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The year 2020 marks the 10th anniversary of the signing of the Affordable Care Act (ACA). Perhaps the greatest overhaul of the US health care system in the past 50 y, the ACA sought to expand access to care, improve quality, and reduce health care costs. Over the past decade, there have been a number of challenges and changes to the law, which remains in evolution. While the ACA's policies were not intended to specifically target surgical care, surgical patients, surgeons, and the health systems within which they function have all been greatly affected. This article aims to provide a brief overview of the impact of the ACA on surgical patients in reference to its tripartite aim of improving access, improving quality, and reducing costs., (Copyright © 2021 Elsevier Inc. All rights reserved.)

Importance: Safety-net hospitals (SNHs) operate under limited financial resources and have had challenges providing high-quality care. Medicaid expansion under the Affordable Care Act led to improvements in hospital finances, but whether this was associated with better hospital quality, particularly among SNHs given their baseline financial constraints, remains unknown., Objective: To compare changes in quality from 2012 to 2018 between SNHs in states that expanded Medicaid vs those in states that did not., Design, Setting, and Participants: Using a difference-in-differences analysis in a cohort study, performance on quality measures was compared between SNHs, defined as those in the highest quartile of uncompensated care in the pre-Medicaid expansion period, in expansion vs nonexpansion states, before and after the implementation of Medicaid expansion. A total of 811 SNHs were included in the analysis, with 316 in nonexpansion states and 495 in expansion states. The study was conducted from January to November 2020., Exposures: Time-varying indicators for Medicaid expansion status., Main Outcomes and Measures: The primary outcome was hospital quality measured by patient-reported experience (Hospital Consumer Assessment of Healthcare Providers and Systems Survey), health care-associated infections (central line-associated bloodstream infections, catheter-associated urinary tract infections, and surgical site infections following colon surgery) and patient outcomes (30-day mortality and readmission rates for acute myocardial infarction, heart failure, and pneumonia). Secondary outcomes included hospital financial measures (uncompensated care and operating margins), adoption of electronic health records, provision of safety-net services (enabling, linguistic/translation, and transportation services), or safety-net service lines (trauma, burn, obstetrics, neonatal intensive, and psychiatric care)., Results: In this difference-in-differences analysis of a cohort of 811 SNHs, no differential changes in patient-reported experience, health care-associated infections, readmissions, or mortality were noted, regardless of Medicaid expansion status after the Affordable Care Act. There were modest differential increases between 2012 and 2016 in the adoption of electronic health records (mean [SD]: nonexpansion states, 99.4 [7.4] vs 99.9 [3.8]; expansion states, 94.6 [22.6] vs 100.0 [2.2]; 1.7 percentage points; P = .02) and between 2012 and 2018 in the number of inpatient psychiatric beds (mean [SD]: nonexpansion states, 24.7 [36.0] vs 23.6 [39.0]; expansion states: 29.3 [42.8] vs 31.4 [44.3]; 1.4 beds; P = .02) among SNHs in expansion states, although they were not statistically significant at a threshold adjusted for multiple comparisons. In subgroup analyses comparing SNHs with higher vs lower baseline operating margins, an isolated differential improvement was noted in heart failure readmissions among SNHs with lower baseline operating margins in expansion states (mean [SD], 22.8 [2.1]; -0.53 percentage points; P = .001)., Conclusions and Relevance: This difference-in-differences cohort study found that despite reductions in uncompensated care and improvements in operating margins, there appears to be little evidence of quality improvement among SNHs in states that expanded Medicaid compared with those in states that did not.

Background: Traumatic injuries are significant sources of morbidity and mortality in the pediatric population. Using a national database, this study aims to characterize pediatric facial fracture management and the effect of health care policy changes on populations receiving treatment., Methods: A retrospective cohort study was performed using Healthcare Cost and Utilization Project Kids' Inpatient Database databases from 2000 to 2016. Pediatric patients admitted with a facial fracture diagnosis were included. Clinical outcomes include mortality, reduction of fracture during hospital stay, and open fracture reduction. The impact of the Affordable Care Act on patient demographics and management was assessed., Results: Between 2000 and 2016, 82,414 patients were managed for facial fractures, 8.3 percent of whom were managed after implementation of the Affordable Care Act (n = 6841). Mean age was 15.2 years, and the male-to-female ratio was 2.9:1. Significant racial disparities were identified before the Affordable Care Act: African American and Native American patients had decreased odds of having facial fracture reduction during the initial hospital stay (OR, 0.84 and 0.86, respectively), and identifying as either Hispanic or Native American was associated with higher odds of mortality (OR, 1.4 or 2.4, respectively). Race was not contributory to patient mortality after the Affordable Care Act. Before Affordable Care Act implementation, patients receiving care with no charge (including charity care/charity research) had lower odds of having an open reduction or any reduction; insurance status was not contributory to management after the Affordable Care Act., Conclusion: Although the Affordable Care Act may have increased access to care for certain populations, race- and sex-associated differences in mortality rate and fracture management should be further investigated to ensure a national standard of equitable patient care., (Copyright © 2020 by the American Society of Plastic Surgeons.)

Background: We aimed to analyze the impact of the Affordable Care Act's Medicaid Expansion on clinical outcomes and patient disposition after burn injury. We hypothesized that increased insurance coverage results in improved outcomes and higher rates of discharge to inpatient rehabilitation., Methods: We reviewed the University of Washington Regional Burn Center registry data for patients admitted from 2011 to 2018. Patients were grouped into two categories: before (2011-2013) and after (2015-2018) Medicaid expansion; we excluded 2014 data to serve as a washout period. Outcomes assessed included length of hospital stay, patient disposition, and mortality. Multivariable logistic and linear regression models with covariates for sex, age, burn size, ethnicity ethnicity, distance from burn center, etiology of burn, and presence of inhalation injury were used to determine the impact of Medicaid expansion on outcomes., Results: Rates of uninsured patients decreased while Medicaid coverage increased. Despite increased median burn size after Medicaid expansion, inpatient mortality rates did not change, but average acute care length of stay increased. More patients were discharged to rehabilitation centers., Conclusions: Our study corroborates prior findings of increased insurance coverage since Medicaid expansion. Increased insurance coverage is associated with higher rates of discharge to inpatient rehabilitation programs after burn injury., (Copyright © 2020 Elsevier Ltd and ISBI. All rights reserved.)

Background: Short- and long-term effects of COVID-19 will likely be designated pre-existing conditions. We describe the prevalence of pre-existing conditions among community health center patients overall and those with COVID-19 by race/ethnicity., Materials and Methods: This cross-sectional study used electronic health record data from OCHIN, a network of 396 community health centers across 14 states., Results: Among all patients with COVID-19, 33% did not have a pre-existing condition before the pandemic. Up to half of COVID-19-positive non-Hispanic Asians (51%), Hispanic (36%), and non-Hispanic black (28%) patients did not have a pre-existing condition before the pandemic., Conclusions: The future of the Patient Protection and Affordable Care Act is uncertain, and the long-term health effects of COVID-19 are largely unknown; therefore, ensuring people with pre-existing conditions can acquire health insurance is essential to achieving health equity., Competing Interests: Conflict of interest: None., (© Copyright 2021 by the American Board of Family Medicine.)

Competing Interests: POTENTIAL CONFLICT OF INTEREST: The authors have indicated they have no potential conflicts of interest to disclose.

Importance: Federally qualified health centers (FQHCs) receive federal funding to serve medically underserved areas and provide a range of services including comprehensive primary care, enabling services, and behavioral health care. Greater funding for FQHCs could increase the local availability of clinic-based care and help reduce more costly resource use, such as emergency department visits (ED)., Objective: To examine the impact of funding increases for FQHCs after the ACA on the use of FQHCs and EDs., Methods: Retrospective study using the Massachusetts All Payer Claims Database (APCD) 2010-2013 that included APCD enrollees in 559 Massachusetts ZIP codes (N = 6,173,563 in 2010). We calculated shift-share predictions of changes in FQHC funding at the ZIP code-level for FQHCs that received Community Health Center funds in any year, 2010-13 (N = 31). Outcomes were the number of ZIP code enrollees with visits to FQHCs and EDs, overall and for emergent and non-emergent diagnoses., Results: In 2010, 4% of study subjects visited a FQHC, and they were more likely to be younger, have Medicaid, and live in low-income areas. We found that a standard deviation increase in prior year FQHC funding (+31 percentage point (pp)) at the ZIP code level was associated with a 2.3pp (95% CI 0.7pp to 3.8pp) increase in enrollees with FQHC visits and a 1.3pp (95% CI -2.3pp to -0.3pp) decrease in enrollees with non-emergent ED visits, but no significant change in emergent ED visits (0.3pp, 95% CI -0.8pp to 1.4pp)., Conclusions: We found that areas exposed to greater FQHC funding increases had more growth in the number of enrollees seen by FQHCs and greater reductions in ED visits for non-emergent conditions. Investment in FQHCs could be a promising approach to increase access to care for underserved populations and reduce costly ED visits, especially for primary care treatable or non-emergent conditions., Competing Interests: The authors have declared that no competing interests exist.

Importance: The Affordable Care Act (ACA) sought to improve access and affordability of health insurance. Although most ACA policies targeted childless adults, the extent to which these policies also impacted families with children remains unclear., Objective: To examine changes in health care-related financial burden for US families with children before and after the ACA was implemented based on income eligibility for ACA policies., Design, Setting, and Participants: Data used for this cohort study were obtained from the 2000-2017 Medical Expenditure Panel Survey, a nationally representative, population-based survey. Multivariable regression with a difference-in-differences estimator was used to examine changes in family financial burden before and after ACA implementation according to income-based ACA eligibility groups (≤138% [lowest-income], 139%-250% [low-income], 251%-400% [middle-income], and >400% [high-income] federal poverty level). The cohort included 92 165 families with 1 or more children (age ≤18 years) and 1 or more adult parents/guardians., Exposures: Income-based eligibility groups during post-ACA years (calendar years 2014-2017) vs pre-ACA years (calendar years 2000-2013)., Main Outcomes and Measures: Family annual out-of-pocket (OOP) health care and premium cost burden relative to income. High OOP burden was determined based on a previously validated algorithm with relative cost thresholds that vary across incomes, and extreme OOP burden was defined as costs exceeding 10% of income. Premiums exceeding 9.5% of income were classified as burdensome and premiums relative to median household income defined an unaffordability index., Results: Compared with high-income families who experienced a lesser change post-ACA implementation (high OOP burden, 1.1% pre-ACA vs 0.9% post-ACA), the lowest-income families saw the greatest reduction in high OOP burden (35.6% pre-ACA vs 23.7% post-ACA; difference-in-differences: -11.4%; 95% CI, -13.2% to -9.5%) followed by low-income families (24.6% pre-ACA vs 17.3% post-ACA, difference-in-differences: -6.8%; 95% CI, -8.7% to -4.9%) and middle-income families (6.1% pre-ACA vs 4.6% post-ACA, difference-in-differences: -1.2%; 95% CI, -2.3% to -0.01%). Although premiums rose for all groups, premium unaffordability was the least exacerbated for the lowest-, low-, and middle-income families compared with higher-income families., Conclusions and Relevance: The findings of this study suggest that low- and middle-income families with children who were eligible for ACA Medicaid expansions and Marketplace subsidies experienced greater reductions in health care-related financial burden after the ACA was implemented compared with families with higher incomes. However, despite ACA policies, many low- and middle-income families with children appear to continue to face considerable financial burden from premiums and OOP costs.

Objective: The purpose of this study was to measure changes in the payer mix and incidence of emergency department (ED) opioid-related overdose encounters after an April 2014 expansion of Medicaid to childless adults led to a 43% increase in Medicaid coverage for men and 8% for women statewide., Method: We explored two competing hypotheses using data visualization and comparative interrupted time-series analysis (CITS): (a) expanded eligibility for Medicaid is associated with a change in payer mix only and (b) sociodemographic groups that gained Medicaid eligibility were more likely to use ED services for opioid overdose. Data included encounters at all Wisconsin nonfederal hospitals over 23 quarters from 2010 to 2015 and American Community Survey estimates of pre- and post-policy Medicaid eligibility by sex and age., Results: We found an increase in the share of opioid-related ED visits covered by Medicaid for men and women ages 19-29 and for men ages 30-49 following the expansion. The number of visits increased substantially in April 2014 for men ages 30-49, with Medicaid-covered visits driving this result. We found little evidence of an increase in overall visits for other age groups for either men or women., Conclusions: The relationship between Medicaid expansion and opioid ED use is complex. Changes in case mix and increased access to care likely both play a role in the overall increase in these ED visits. Being uninsured may be an important barrier to seeking emergency care for opioid-related overdoses.

Background: Low-income adults in the United States have historically had poor access to dental services largely due to limited dental coverage., Objective: We examined the effects of recent Medicaid income-eligibility expansions under the Affordable Care Act on dental visits separately for preventive care and treatments., Research Design: We used restricted data from the 2011 to 2016 Medical Expenditure Panel Survey with state geocodes. The main analytical sample included nearly 21,000 individuals who were newly eligible for Medicaid. We employed a quasi-experimental difference-in-differences design to identify the impact of the state Medicaid expansions effective in 2014 on dental services use by the level of state Medicaid dental benefit for the newly eligible., Results: Expanding Medicaid in 2014 with extensive or limited dental coverage increased preventive dental visits and use of major dental treatments by over 5 percentage-points in 2014 and 2015. The increase in preventive visits continued in 2016 in expanding states with extensive coverage, while increase in major dental treatments continued in 2016 in expanding states with limited coverage. There is some but less consistent evidence of an increase in dental treatment with emergency-only coverage., Conclusions: Medicaid expansions with dental coverage beyond emergency-only services have increased access of the newly eligible low-income adults to dental treatments and preventive services, with extensive coverage showing continuing increase in preventive services use 3 years after the expansion. With limited coverage, there is some evidence of individuals needing to stretch treatments over a longer period. Providing comprehensive dental coverage can address unmet dental needs and improve oral health among low-income adults.

Background: Under the Affordable Care Act, the Centers for Medicare and Medicaid Services has greatly expanded inpatient fee-for-value programs including the Hospital Value-based Purchasing (HVBP) program. Existing evidence from the HVBP program is mixed. There is a need for a systematic review of the HVBP program to inform discussions on how to improve the program's effectiveness., Objective: To review and summarize studies that evaluated the HVBP program's impact on clinical processes, patient satisfaction, costs and outcomes, or assessed hospital characteristics associated with performance on the program., Design: We searched the MEDLINE/PubMed, Scopus, ProQuest database for literature published between January 2013 and July 2019 using the Preferred Reporting Items for Systematic Reviews and Meta-Analysis guidelines., Results: Of 988 studies reviewed, 33 studies that met the selection criteria were included. A small group of studies (n=7) evaluated the impact of the HVBP program, and no impact on processes or patient outcomes was reported. None of the included studies evaluated the effect of HVBP program on health care costs. Other studies (n=28) evaluated the hospital characteristics associated with HVBP performance, suggesting that safety-net hospitals reportedly performed worse on several quality and cost measures. Other hospital characteristics' associations with performance were unclear., Conclusions: Our findings suggest that the current HVBP does not lead to meaningful improvements in quality of care or patient outcomes and may negatively affect safety-net hospitals. More rigorous and comprehensive adjustment is needed for more valid hospital comparisons.

Objective: To examine trends in uninsured rates between 2012 and 2016 among low-income adults aged <65 years and to determine whether the Patient Protection and Affordable Care Act (ACA), which expanded Medicaid, impacted insurance coverage in the Diabetes Belt, a region across 15 southern and eastern U.S. states in which residents have high rates of diabetes., Research Design and Methods: Data for 3,129 U.S. counties, obtained from the Small Area Health Insurance Estimates and Area Health Resources Files, were used to analyze trends in uninsured rates among populations with a household income ≤138% of the federal poverty level. Multivariable analysis adjusted for the percentage of county populations aged 50-64 years, the percentage of women, Distressed Communities Index value, and rurality., Results: In 2012, 39% of the population in the Diabetes Belt and 34% in non-Belt counties were uninsured ( P < 0.001). In 2016 in states where Medicaid was expanded, uninsured rates declined rapidly to 13% in Diabetes Belt counties and to 15% in non-Belt counties. Adjusting for county demographic and economic factors, Medicaid expansion helped reduce uninsured rates by 12.3% in Diabetes Belt counties and by 4.9% in non-Belt counties. In 2016, uninsured rates were 15% higher for both Diabetes Belt and non-Belt counties in the nonexpansion states than in the expansion states., Conclusions: ACA-driven Medicaid expansion was more significantly associated with reduced uninsured rates in Diabetes Belt than in non-Belt counties. Initial disparities in uninsured rates between Diabetes Belt and non-Belt counties have not existed since 2014 among expansion states. Future studies should examine whether and how Medicaid expansion may have contributed to an increase in the use of health services in order to prevent and treat diabetes in the Diabetes Belt., (© 2020 by the American Diabetes Association.)

Background: American health care is facing unprecedented challenges due to population aging, chronic disease prevalence, and financial restructuring. The Affordable Care Act (ACA) is transforming the primary care landscape from a reactive, episodic, fee-for-service system to a proactive, preventive, value-based system. A proactive, preventive, and value-based primary care model requires Registered Nurses (RNs) prepared to lead integrated, team-based, coordinated, and proactively managed care. The Health Resources and Service Administration (HRSA) forecasted an inadequate supply of RNs prepared to meet future primary care demands and highlighted the lack of education as a key problem. The primary care RN workforce shortage requires immediate attention by academic, political, and research stakeholders. HRSA has responded with academic funding to increase primary care RN education., Procedures: This article describes key barriers and resolutions one HRSA-funded academic institution experienced while implementing a primary care RN education program, along with research implications for the future of primary care nursing., Results: This article describes the project's stakeholder, faculty, and student engagement methods. This article also describes the clinic RN preceptor development program, and depicts the Primary Care RN Education Program Student Clinical Experience Preceptorship Model., Conclusions: Nursing education must align with transforming healthcare models while anticipating potential barriers and resolutions to enhancing curriculum with primary care nursing education and clinical experiences. This article provides insight for other academic institutions interested in developing primary care curriculum and academic-clinic partnership models to foster community-based primary care clinical experiences., (© 2020 Wiley Periodicals, Inc.)

Background: To assess the association between the implementation of Medicare Part D and the use of outpatient prescription opioids., Methods: Nationally representative data on community-dwelling adults aged 60-69 came from the 2000-2015 Medical Expenditure Panel Survey (MEPS) (N = 26,545). A difference-in-differences approach was used to compare opioid use between Medicare eligible (ages 66-69) and Medicare ineligible (ages 60-64) adults before and after the introduction of Part D in 2006, while controlling for socio-demographic characteristics, risk factors for opioid use, and secular trends., Results: Medicare Part D was associated with a small and statistically non-significant increase in the number of outpatient prescription opioids filled in a year (coefficient, 0.03; 95% CI, -0.08 to 0.13), in the amount of morphine milligrams equivalents (coefficient, 113.23; 95% CI, -25.47 to 251.93), and in the odds of using any prescription opioid (OR, 1.03; 95% CI, 0.85 to 1.26). There was no evidence for a heterogeneous effect of Part D across subgroups. The results were robust to the impacts of the 2007-2009 recession, the spillover effect of the Affordable Care Act, and the anticipation effect of Part D., Discussion: Although policymakers suggested that gaining access to medical care as a result of insurance expansion might have fueled the opioid epidemic, this paper found limited evidence to support this claim. While Part D took effect more than a decade ago, its long-term implication for opioid use is still relevant for the recent opioid epidemic and future health insurance expansions such as the proposed Medicare-for-all initiative., Competing Interests: Declaration of Competing Interest The author declares no competing interests., (Copyright © 2020 Elsevier B.V. All rights reserved.)

Background: Although the reasons for discontinued breastfeeding are multifactorial, an unsupportive work environment is consistently reported as a barrier to continued breastfeeding. In the United States, several state breastfeeding advocates have taken a distinctive approach to promote worksite lactation support by developing statewide recognition initiatives aimed at incentivizing employers to support breastfeeding employees by offering public recognition for the worksites' efforts., Research Aim: To identify and describe statewide worksite lactation support recognition initiatives in the United States., Methods: Between May 2016 and June 2017, semi-structured phone interviews were conducted with breastfeeding experts in each U.S. state ( N = 60 participants) for this cross-sectional study. Experts in states with a recognition initiative were asked about the background, structure, and requirements of the initiative., Results: Twenty-six states had a current initiative, and some had requirements for providing a private space ( n = 19; 73%) and time ( n = 18; 69%) for employees to express human milk, as well as a written worksite lactation support policy ( n = 10; 38%)., Conclusions: This was the first study in which researchers systematically identified ongoing worksite lactation support recognition initiatives in the United States. The results of this work also served to highlight both the similarities and the variety between initiatives. Future researchers should aim to determine the components of an initiative that increase employer support and, in turn, breastfeeding rates.

Background: Medicaid plays a critical role during the perinatal period, but pregnancy-related Medicaid eligibility only extends for 60 days post partum. In 2014, the Affordable Care Act's (ACA's) Medicaid expansions increased adult Medicaid eligibility to 138% of the federal poverty level in participating states, allowing eligible new mothers to remain covered after pregnancy-related coverage expires. We investigate the impact of ACA Medicaid expansions on insurance coverage among new mothers living in poverty., Methods: We define new mothers living in poverty as women ages 19 to 44 with incomes below the federal poverty level who report giving birth in the past 12 months. We use 2010-2017 American Community Survey data and a difference-in-differences approach using parental Medicaid-eligibility thresholds to estimate the effect of ACA Medicaid expansions on insurance coverage among poor new mothers., Results: A 100-percentage-point increase in parental Medicaid-eligibility is associated with an 8.8-percentage-point decrease ( P < .001) in uninsurance, a 13.2-percentage-point increase ( P < .001) in Medicaid coverage, and a 4.4-percentage-point decrease in private or other coverage ( P = .001) among poor new mothers. The average increase in Medicaid eligibility is associated with a 28% decrease in uninsurance, a 13% increase in Medicaid coverage, and an 18% decline in private or other insurance among poor new mothers in expansion states. However, in 2017, there were ∼142 000 remaining uninsured, poor new mothers., Conclusions: ACA Medicaid expansions are associated with increased Medicaid coverage and reduced uninsurance among poor new mothers. Opportunities remain for expansion and nonexpansion states to increase insurance coverage among new mothers living in poverty., Competing Interests: POTENTIAL CONFLICT OF INTEREST: The authors have indicated they have no potential conflicts of interest to disclose., (Copyright © 2020 by the American Academy of Pediatrics.)

Background: The Affordable Care Act (ACA) has been associated with increased heart transplant listings among blacks, who are disproportionately uninsured. It is unclear whether the ACA is also associated with increased ventricular assist device implantation in blacks., Methods: Using Healthcare Cost and Utilization Project Data State Inpatient Databases from 19 states and Washington DC, we analyzed 1157 patients from early-adopter states (ACA Medicaid expansion by January 2014) and 785 patients from nonadopter states (no implementation from 2013 to 2014). Piecewise Poisson regression with a discontinuity was used to estimate change in census-adjusted rates of ventricular assist device implants by race and ACA adopter status 1 year before and after January 2014., Results: Following the ACA Medicaid expansion, the proportional change in rate increased significantly among blacks from early adopter (1.40 [95% CI, 1.12-1.75], pre 0.57/100 000 to post-ACA 0.80/100 000) but not nonadopter states (1.25 [95% CI, 0.98-1.58], pre 0.40/100 000 to post-ACA 0.50/100 000). However, the early and nonadopter changes in implantation rates were not statistically different from each other ( P =0.50). There were no immediate changes in whites in either state group following the ACA Medicaid expansion (early adopter, 1.12 [95% CI, 0.98-1.29], pre 0.27/100 000 to post-ACA 0.30/100 000; nonadopter, 0.98 [95% CI, 0.82-1.16], pre 0.27/100 000 to post-ACA 0.26/100 000)., Conclusions: Among eligible states participating in Healthcare Cost and Utilization Project Data State Inpatient Databases, the ACA was not associated with immediate changes in ventricular assist device implantation rates by race. Although a significant increase in implantation rate was observed among blacks from early-adopter states, the change was not statistically different from the change seen in nonadopter states.

Persons without health care coverage have poorer health outcomes. We investigated the association between health care coverage and trends in the prevalence of cardiovascular disease (CVD) and diabetes pre- and post-Affordable Care Act (ACA) periods. Using data from 3,824,678 surveyed adults in the Behavioral Risk Factor Surveillance System survey from 2007 - 2016, we calculated the yearly prevalence of CVD and diabetes. Using logistic regression, we investigated the association between health care coverage and CVD and diabetes, controlling for sociodemographic factors (age, sex, race, marital status, education and income). The mean age of participants was 55.3 ± 18.9 years. Health care coverage increased from 88.6% in 2007 to 93% in 2016. The prevalence of CVD and diabetes increased from pre- to post-ACA periods. After adjustment, in pre-ACA period, the odds ratio (OR) for the association between health care coverage and CVD and diabetes was 1.32 (95% CI:1.30-1.34) and 1.44 (95% CI:1.41-1.46), respectively; in the post-ACA period, the OR was 1.26 (95% CI:1.22-1.30) and 1.48 (95% CI:1.44-1.52), respectively. We found a significant association between health care coverage and trends in the prevalence of CVD and diabetes in the pre- and post-ACA periods., (Copyright © 2020 Elsevier Inc. All rights reserved.)

Objective: To examine the impact of the Affordable Care Act on preventable hospitalizations and associated charges for patients living with systemic lupus erythematosus, before and after Medicaid expansion., Methods: A retrospective, quasi-experimental study, using an interrupted time series research design, was conducted to analyze data for 8 states from the Healthcare Cost and Utilization Project state inpatient databases. Lupus hospitalizations with a principal diagnosis of predetermined ambulatory-care sensitive (ACS) conditions were the unit of primary analysis. The primary outcome variable was access to care measured by preventable hospitalizations caused by an ACS condition., Results: There were 204,150 lupus hospitalizations in the final analysis, with the majority (53.5%) of lupus hospitalizations in states that did not expand Medicaid. In unadjusted analysis, Medicaid expansion states had significantly lower odds of having preventable lupus hospitalizations (odds ratio [OR] 0.958); however, after adjusting for several covariates, Medicaid expansion states had increased odds of having preventable lupus hospitalizations (OR 1.302). Adjusted analysis showed that those individuals with increased age, public insurance (Medicare or Medicaid), no health insurance, rural residence, or low income had significantly higher odds of having a preventable lupus hospitalization. States that expanded Medicaid had $523 significantly more charges than states that did not expand Medicaid. Older age and rural residence were associated with significantly higher charges., Conclusion: Our findings suggest that while Medicaid expansion increased health insurance coverage, it did not address other issues related to access to care that could reduce the number of preventable hospitalizations., (© 2019, American College of Rheumatology.)

Few investigations have explored the potential impact of the Affordable Care Act on health disparity outcomes in states that chose to forgo Medicaid expansion. Filling this evidence gap is pressing as Congress grapples with controversial healthcare legislation that could phase out Medicaid expansion. Colorectal cancer (CRC) is a commonly diagnosed, preventable cancer in the US that disproportionately burdens African American men and has substantial potential to be impacted by improved healthcare insurance coverage. Our objective was to estimate the impact of the Affordable Care Act (increasing insurance through health exchanges alone or with Medicaid expansion) on colorectal cancer outcomes and economic costs among African American and White males in North Carolina (NC), a state that did not expand Medicaid. We used an individual-based simulation model to estimate the impact of ACA (increasing insurance through health exchanges alone or with Medicaid expansion) on three CRC outcomes (screening, stage-specific incidence, and deaths) and economic costs among African American and White males in NC who were age-eligible for screening (between ages 50 and 75) during the study period, years of 2013-2023. Health exchanges and Medicaid expansion improved simulated CRC outcomes overall, though the impact was more substantial among AAs. Relative to health exchanges alone, Medicaid expansion would prevent between 7.1 to 25.5 CRC cases and 4.1 to 16.4 per 100,000 CRC cases among AA and White males, respectively. Our findings suggest policies that expanding affordable, quality healthcare coverage could have a demonstrable, cost-saving impact while reducing cancer disparities., Competing Interests: Stephanie Wheeler discloses that she received unrelated grant funding from Pfizer. This does not alter our adherence to PLOS ONE policies on sharing data and materials. The other authors have declared that no competing interests exist.

Healthcare delivery in the Unites States stimulates policy change at a rapid pace. The Patient Protection and Affordable Care Act of 2010 (ACA) is intended to expand access to care and ultimately improve the health of Americans. The Triple Aim, created by The Institute for Healthcare Improvement, delineates policy implications for improving population health, the healthcare experience, and per capita cost. The Quadruple Aim adds a fourth policy implication, for example, addressing the needs of the healthcare provider. Advanced practice registered nurses are key in carrying out the goals of the ACA and achieving the Triple and Quadruple Aims, via the formation of interprofessional teams. This article offers insight into these policy implications and identifies filters through which related nursing policy will be developed., (© 2019 Wiley Periodicals, Inc.)

Context: This article argues that the devolution of the Affordable Care Act (ACA) to the states contributed to the slow progression of national public support for health care reform., Methods: Using small-area estimation techniques, the authors measured quarterly state ACA attitudes on five topics from 2009 to the start of the 2016 presidential election., Findings: Public support for the ACA increased after gubernatorial announcement of state-based exchanges. However, the adoption of federal or partnership marketplaces had virtually no effect on public opinion of the ACA and, in some cases, even decreased positive perceptions., Conclusions: The authors' analyses point to the complexities in mass preferences toward the ACA and policy feedback more generally. The slow movement of national ACA support was due partly to state-level variations in policy making. The findings suggest that, as time progresses, attitudes in Republican-leaning states with state-based marketplaces will become more positive toward the ACA, presumably as residents begin to experience the positive effects of the law. More broadly, this work highlights the importance of looking at state-level variations in opinions and policies., (Copyright © 2019 by Duke University Press.)

Objective: In response to rising national health expenditures, the Patient Protection and Affordable Care Act (ACA) was passed in 2010, with major provisions implemented in 2014. Due to increasing concerns about workload and compensation among neurosurgeons, we evaluated trends in neurosurgical reimbursement, productivity and compensation before and after the implementation of the major provisions of the ACA., Patients and Methods: Results from Neurosurgery Executives' Resource Value and Education Society (NERVES) annual surveys were collected, representing data from 2011 to 2016. Responses from different practice settings across the six years were categorized into groups, and inverse variance-weighted averaging was performed within the frameworks of a one-way ANOVA model with year. Data from 2011 to 2013 and 2014-2016 were analyzed similarly for differences among practice setting and region., Results: The NERVES survey response rates ranged from 20% to 36%. Median values for compensation decreased by 3.66%, 6.42%, and 10.34% within private, hospital, and academic practices respectively after 2014 although these trends did not reach statistical significance. Median work RVUs had a trend to decrease by 5.67%, 13.08%, and 19.44% within private, hospital, and academic practices respectively after 2014. Academic practices showed statistically significant decreases in annual total RVUs, total gross charges and collections., Conclusion: These data demonstrate neurosurgical reimbursement and productivity have trended down during a time that increases in productivity and reimbursement were predicted. This phenomenon is most notable in academic practices compared to private or hospital based practices. Prospective analyses of the impact of healthcare policy reform on neurosurgical productivity are urgently needed., (Published by Elsevier B.V.)

Analyzing national survey data, we found that workers in traditionally blue-collar industries (service jobs, farming, construction, and transportation) experienced the largest gains in health insurance after implementation of the Affordable Care Act (ACA) in 2014. Compared to other occupations, these had lower employer-based coverage rates before the ACA. Most of the post-ACA coverage gains came from Medicaid and directly purchased nongroup insurance.

Objectives: After the Affordable Care Act (ACA) took full effect in 2014, 900 000 children obtained health insurance. Researchers have found variable effects of insurance on adult emergency department (ED) use, but the effect in pediatric patients is unknown. We examined ED visit rates before and after 2014 among children., Methods: We used estimates of ED visit counts from the Nationwide Emergency Department Sample and population estimates from the American Community Survey in a cross-sectional, retrospective study of ED visit rates among children. We compared the trend in ED visit rates before (2009-2013) and after (2014-2016) the ACA took full effect, controlling for age, sex, and census region., Results: The mean ED use rate was 35.2 visits per 100 children from 2009 to 2013 and 36.6 from 2014 to 2016. ED visit rates increased by 1.1% per year pre-2014 and 9.8% from 2014 to 2016 (incidence rate ratio 1.09, 95% confidence interval 1.03-1.15, P = .005). Results did not vary significantly when insurance was included as a control variable., Conclusions: There was no immediate change in pediatric ED visit rates the year after the ACA took full effect in 2014, but the rate of change from 2014 to 2016 was significantly higher than previous rate trends. In our model, increased pediatric insurance coverage neither drove nor counteracted the observed trends., Competing Interests: POTENTIAL CONFLICT OF INTEREST: The authors have indicated they have no potential conflicts of interest to disclose., (Copyright © 2019 by the American Academy of Pediatrics.)

Purpose: Federally Qualified Health Centers (FQHCs), which were expanded under the Affordable Care Act, are federally funded health centers that aim to improve access to primary care in underserved areas. With continued federal support, the number of FQHCs in the United States has increased >80% within a decade. However, the expansion patterns and their impact on the population served are unknown., Methods: A pre (2007)-post (2014) study of FQHC locations. FQHC locations were identified from the Provider of Services Files then linked to primary care service areas (PCSAs), which represent the service markets that FQHCs served. Road-based travel time was estimated from each 2007 FQHC to the nearest new FQHC as an indicator of geographic expansion in access. PCSA-level characteristics were used to compare 2007 and 2014 FQHC service markets., Findings: Between 2007 and 2014, there was greater expansion in the number of FQHCs (3,489 vs 6,376; 82.7%) than in the number of service markets (1,835 vs 2,695; 46.9%). Nearly half of 2007 FQHCs (47%) had at least one new FQHC within 30 minutes travel time. Most newly certified FQHCs (81%) were located in urban areas. Compared to 2007 service markets, the new 2014 markets (N = 174) were much less likely to be in areas with >20% of the population below poverty (31.4% vs 14.9%, P < .001)., Conclusions: The latest expansion of FQHCs was less likely to be in rural or high poverty areas, suggesting the impact of expansion may have limitations in improving access to care among the most financially disadvantaged populations., (© 2018 National Rural Health Association.)

Importance: The Hospital Readmissions Reduction Program (HRRP) was recently expanded to penalize excessive readmissions after total hip arthroplasty (THA) and total knee arthroplasty (TKA). These are the first surgical procedures to be included in the HRRP., Objective: To determine whether the HRRP was associated with a greater decrease in readmissions after targeted procedures (THA and TKA) compared with similar nontargeted procedures (lumbar spine fusion and laminectomy)., Design, Setting, and Participants: A retrospective cohort study was conducted of patients 50 years or older among all payers in the Nationwide Readmissions Database who underwent THA, TKA, lumbar spine fusion, or laminectomy between January 1, 2010, and September 30, 2015. Multivariable logistic regression and interrupted time-series models were used to calculate and compare 30-day readmission trends in 3 periods associated with the HRRP: preimplementation (January 2010-September 2012), implementation (October 2012-September 2014), and penalty (October 2014-September 2015). Statistical analysis was performed from January 1, 2010, to September 30, 2015., Exposures: Announcement and implementation of the HRRP., Main Outcomes and Measures: Readmission within 30 days after hospitalization for THA, TKA, lumbar spine fusion, or laminectomy surgery., Results: The study included 6 687 077 (58.3% women and 41.7% men; mean age, 66.7 years; 95% CI, 66.7-66.8 years) weighted hospitalizations for THA, TKA, lumbar spine fusion, and laminectomy surgery: 4 765 466 hospitalizations for targeted conditions and 1 921 611 for nontargeted conditions. After passage of the Patient Protection and Affordable Care Act, the risk-adjusted rates of readmission after all procedures decreased in a similar fashion. Implementation of the HRRP was associated with a 0.018% per month decrease in the rate of readmission (95% CI, -0.025% to -0.010%) after targeted procedures, which was not observed after nontargeted procedures (slope per month, -0.003%; 95% CI, -0.016% to 0.010%). Penalties were not associated with a greater decrease in readmission for either targeted or nontargeted procedures., Conclusions and Relevance: These results appear to be consistent with hospitals responding to the future possibility of penalties by reducing readmissions after surgical procedures targeted by the HRRP.

Background: Insurance coverage of vascular surgery patients may differ from patients with less chronic surgical pathologies. The goal of this study is to identify trends in insurance status of vascular surgery patients over the last 10 years at a busy academic center., Methods: All consecutive patient visits for a vascular procedure from 2006 to 2016 were retrospectively reviewed from a prospectively collected institutional database. Data points included insurance status, procedures performed, and date of admission. The insurance status was categorized as Medicare, Medicaid, and uninsured. Samples were divided between 2006-2009 and 2011-2016 for comparison. Unpaired t-test, chi-squared test, and regression analysis were used to determine significant trends over the study period., Results: From 2006 to 2016, 6,007 vascular surgery procedures were performed. Procedure volume increased significantly from 1,309 to 4,698 between the 2 timeframes (P < 0.05), whereas the percentage of Medicaid and Medicare patients trended upward but did not achieve significance. There was a significant decrease in the percentage of uninsured patients between the cohorts (5.65% vs. 2.96%, P < 0.05). In 2012, 10.14% of patients were uninsured compared with 2.56% in 2016 (P < 0.05)., Conclusions: Insurance status affects access to care and subsequent outcomes. In our busy academic center, insurance coverage for vascular surgery has significantly increased over the past decade. The number of Medicaid and Medicare patients has slowly increased, but a significant and continuing decline in uninsured patients was observed. Implementation of the Affordable Care Act during this time period may have played a role in providing coverage for patient needing vascular surgery., (Copyright © 2018. Published by Elsevier Inc.)

Objective: To estimate the impact of the major components of the ACA (Medicaid expansion, subsidized Marketplace plans, and insurance market reforms) on disparities in insurance coverage after three years., Data Source: The 2011-2016 waves of the American Community Survey (ACS), with the sample restricted to nonelderly adults., Design: We estimate a difference-in-difference-in-differences model to separately identify the effects of the nationwide and Medicaid expansion portions of the ACA using the methodology developed in the recent ACA literature. The differences come from time, state Medicaid expansion status, and local area pre-ACA uninsured rates. In order to focus on access disparities, we stratify our sample separately by income, race/ethnicity, marital status, age, gender, and geography., Principal Findings: After three years, the fully implemented ACA eliminated 43% of the coverage gap across income groups, with the Medicaid expansion accounting for this entire reduction. The ACA also reduced coverage disparities across racial groups by 23%, across marital status by 46%, and across age-groups by 36%, with these changes being partly attributable to both the Medicaid expansion and nationwide components of the law., Conclusions: The fully implemented ACA has been successful in reducing coverage disparities across multiple groups., (© 2018 The Authors. Health Services Research published by Wiley Periodicals, Inc. on behalf of Health Research and Educational Trust.)

Background: Michigan expanded Medicaid under the Affordable Care Act (Healthy Michigan Plan [HMP]) to improve the health of low-income residents and the state's economy., Objective: To understand HMP's impact on enrollees' health, ability to work, and ability to seek employment DESIGN: Mixed methods study, including 67 qualitative interviews and 4090 computer-assisted telephone surveys (response rate 53.7%) PARTICIPANTS: Non-elderly adult HMP enrollees MAIN MEASURES: Changes in health status, ability to work, and ability to seek employment KEY RESULTS: Half (47.8%) of respondents reported better physical health, 38.2% better mental health, and 39.5% better dental health since HMP enrollment. Among employed respondents, 69.4% reported HMP helped them do a better job at work. Among out-of-work respondents, 54.5% agreed HMP made them better able to look for a job. Among respondents who changed jobs, 36.9% agreed HMP helped them get a better job. In adjusted analyses, improved health was associated with the ability to do a better job at work (aOR 4.08, 95% CI 3.11-5.35, p < 0.001), seek a job (aOR 2.82, 95% CI 1.93-4.10, p < 0.001), and get a better job (aOR 3.20, 95% CI 1.69-6.09, p < 0.001), but not with employment status (aOR 1.08, 95% CI 0.89-1.30, p = 0.44). In interviews, several HMP enrollees attributed their ability to get or maintain employment to improved physical, mental, and dental health because of services covered by HMP. Remaining barriers to work cited by enrollees included older age, disability, illness, and caregiving responsibilities., Conclusions: Many low-income HMP enrollees reported improved health, ability to work, and job seeking after obtaining health insurance through Medicaid expansion.

Background: The Patient Protection and Affordable Care Act was signed into law in 2010 and enacted in 2013 which improved insurance coverage across America due to increasing Medicaid eligibility as well as changes to individual insurance markets. In Arkansas, this was implemented by a Medicaid expansion waiver which allowed patients to purchase insurance with funds provided by the government to subsidize premiums through the marketplace. The goal of this study was to determine the effects of the Affordable Care Act (ACA) on Arkansas patients with peripheral arterial disease., Methods: A pre-post research design using the Arkansas Hospital Discharge Dataset was used to study the impact of the ACA on limb amputation, distal bypass, discharge disposition, and total costs for patients diagnosed with peripheral arterial disease/atherosclerosis. The data were obtained for the years 2007 through 2009 (pre-ACA), 2011 through 2013 (post-ACA), and 2014 through 2015 (post-Arkansas expansion). Bivariate analysis, analysis of variance, and regression analyses were performed to analyze the data., Results: A total of 10,923 patients were identified. Uninsured patients ("self-pay") decreased from 7% pre-ACA to 3.4% post-Arkansas expansion (P < 0.0001). There was a decrease in adjusted health-care costs after the Arkansas expansion (P < 0.0001). There was no change in mortality or transfer to rehabilitation facilities, but there was an increase in discharge to skilled nursing facilities along with a decrease in patients being discharged home (P < 0.0001). Regression analysis showed private insurance to be associated with a 49% reduction in the odds of an amputation (P < 0.0001). The Arkansas expansion was associated with a 26% reduction in the odds of an amputation when compared with that before the ACA implementation (P < 0.005). Having private insurance was associated with a 26% increase in the odds of having a bypass when compared with uninsured patients (P < 0.05)., Conclusions: Patients with private insurance have a decreased chance of amputation and increased odds of having a bypass when compared with patients who were of the self-pay category. The increase in private insurance coverage in our patient population could improve the rate of amputation in the vascular population in Arkansas by increasing early interventions for peripheral vascular disease., (Copyright © 2018 Elsevier Inc. All rights reserved.)

Introduction: Disparities in receiving advice to quit smoking and other tobacco use from health professionals may contribute to the continuing gap in smoking prevalence among priority populations. Under the Affordable Care Act (ACA), beginning in 2010, tobacco cessation services are currently covered in private and public health insurance plans. Providers and hospitals are also incentivized through the Meaningful Use of Electronic Health Records (EHRs) to screen and document patients' tobacco use and deliver brief cessation counseling. This study analyzes trends and correlates of receiving health professionals' advice to quit and potential disparities among US adult smokers from 2010 to 2015., Methods: Data were from the National Health Interview Survey in 2010 and 2015. We analyzed the weighted prevalence of smokers' receipt of advice to quit smoking and other tobacco use from a health professional in 2010 and 2015 and correlates of receiving advice to quit., Results: Prevalence of receiving advice to quit from a health professional increased from 51.4% in 2010 to 60.6% in 2015. This positive trend was observed across tobacco disparity population groups. Survey year (2015), age (older), ethnicity (non-Hispanic), region (Northeast), poverty level (above 100% poverty level), past quit attempt, daily smoking, cigarettes per day (11+ per day), and psychological distress were associated with higher odds of receiving advice to quit., Conclusion: Based on national level data, receipt of advice to quit from health professionals increased between 2010 and 2015. However, disparities in receiving advice to quit from health professionals persist in certain populations., Implications: This study provides important data on the national trends in receipt of health professional advice to quit smoking and other tobacco use in the context of the ACA and Meaningful Use implementation and whether these policies helped to narrow the gaps in receipt of health professional advice among vulnerable populations.

Issue: The Affordable Care Act (ACA) made it easier for older adults and those with medical conditions to enroll in individual-market coverage by eliminating risk rating and limiting age rating. While the ACA also encourages young and healthy people to enroll through subsidies and the individual mandate, it’s not clear whether these incentives have been sufficient to prevent the risk pool from becoming disproportionately old and sick., Goal: To assess whether patterns in individual-market participation changed following ACA implementation., Methods: Comparison of Medical Expenditure Panel Survey (MEPS) data for the periods 2003–09 and 2014–15., Findings and Conclusion: The analysis found few differences in individual-insurance market participation before and after the ACA. Adverse selection occurred during both: people switching into individual insurance coverage after being uninsured were higher utilizers prior to the switch than were those who remained uninsured. Those who disenrolled from individual plans tended to be lower utilizers of care before switching compared with those who kept their coverage. The main difference was that more people--especially young adults--switched from Medicaid to individual insurance, and vice versa, after the ACA. Adverse enrollment or disenrollment in the individual market did not increase following ACA implementation. The combination of easing rating rules and encouraging participation appears to have maintained market stability.

The cost of providing healthcare in the United States continues to rise. The Affordable Care Act created systems to test value-based alternative payments models. Traditionally, procedure-based specialists such as neurointerventionalists have largely functioned in, and are thus familiar with, the traditional Fee for Service system. Administrative charge data would suggest that neurointerventional surgery is an expensive specialty. The Medicare Access and CHIP Reauthorization Act consolidated pre-existing federal performance programs in the Merit-based Incentive Payments System (MIPS), including a performance category called 'cost'. Understanding cost as a dimension that contributes to the value of care delivered is critical for succeeding in MIPS and offers a meaningful route for favorably bending the cost curve., Competing Interests: Competing interests: JAH has consulted for Medtronic and Globus in the last 36 months – unrelated. JAH and ABR are supported by Research Grants from the Harvey L. Neiman Health Policy Institute NC and RD and both work for Acumen, LLC. This article does not express the opinions of Acumen, LLC., (© Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2018. All rights reserved. No commercial use is permitted unless otherwise expressly granted.)

Background: Access to medical care, by adequate insurance coverage, has a direct impact on outcomes for patients undergoing vascular procedures. We evaluated in-hospital mortality for patients undergoing index vascular procedures before and after the Massachusetts Healthcare Reform Law (MHRL) in 2006, which mandated insurance for all Massachusetts residents, both in Massachusetts and throughout the United States., Methods: The National Inpatient Sample was queried to identify patients undergoing interventions for peripheral arterial disease, carotid artery stenosis, and abdominal aortic aneurysms based on International Classification of Diseases, Ninth Revision, Clinical Modification procedural and diagnostic codes. The cohort was then divided into patients treated within Massachusetts (MA) and non-Massachusetts (NMA) hospitals. Two time intervals were examined: before (2003-2006, P1) and after the MHRL (2007-2011, P2). The primary outcome of interest included in-hospital mortality. Patients in MA and NMA hospitals were described in terms of demographics and presentation by time interval (P2 vs P1) compared using χ 2 and t-tests. Weighted logistic regression with term modeling change in the odds ratio (OR) for P2 was performed to test and to estimate trends in mortality. Time (year of procedure) and region interactions were investigated by inclusion of time-region interactions in our analyses. Subgroup analysis was performed for P2 vs P1 among nonwhite, nonelderly, and low-income patients., Results: We identified 306,438 patients who underwent repair of abdominal aortic aneurysm, lower extremity bypass, or carotid endarterectomy in MA and NMA hospitals. MA hospital patients had an increase in both Medicaid and private insurance status after the MHRL (P1 = 2.6% and 21% vs P2 = 3.3% and 21.7%, respectively; P = .034). In-hospital mortality trended down for all groups across the entire study. In comparing P2 vs P1 trends, MA hospital odds of mortality per year was lowered by 26% (OR, 0.74; 95% confidence interval [CI], 0.56-0.99; P = .042) not seen in NMA hospitals (OR, 1.03; 95% CI, 0.97-1.09; P = .405). Time and region interaction terms indicated significant time trend difference in both unadjusted (P = .031) and adjusted (P = .033) analysis in MA hospitals not observed in NMA hospitals. This pattern continued when the samples were stratified by procedure. Patients undergoing vascular procedures in MA hospitals had a significantly lowered OR of mortality, with fewer patients presenting at late disease stages in P2 vs P1. Nonelderly patients in Massachusetts, who benefit from the Medicaid expansion provided by the MHRL, had a profound 92% drop in odds of mortality in P2 vs P1 (OR, 0.08; 95% CI, 0.010-0.641; P = .017) compared with the 14% drop in NMA (OR, 0.86; 95% CI, 0.709-1.032; P = .103)., Conclusions: The 2006 MHRL is associated with a decrease in mortality for patients undergoing index vascular surgery procedures in MA compared with NMA hospitals. This study suggests that governmental policy may play a key role in positively affecting the outcomes for patients., (Copyright © 2018 Society for Vascular Surgery. Published by Elsevier Inc. All rights reserved.)

While the Affordable Care Act has expanded health insurance to millions of Americans through the expansion of eligibility for Medicaid and the health insurance Marketplaces, concerns about Marketplace stability persist-given increasing premiums and multiple insurers exiting selected markets. Yet there has been little investigation of what factors underlie this pattern. We assessed the county-level prevalence of limited insurer participation (defined as having two or fewer distinct participating insurers) in Marketplaces in the period 2014-18. Overall, in 2015 and 2016 rates of insurer participation were largely stable, and approximately 80 percent of counties (containing 93 percent of US residents) had at least three Marketplace insurers. However, these proportions declined sharply starting in 2017, falling to 36 percent of counties and 60 percent of the population in 2018. We also examined county-level factors associated with limited insurer competition and found that it occurred disproportionately in rural counties, those with higher mortality rates, and those where insurers had lower medical loss ratios (that is, potentially higher profit margins), as well as in states where Republicans controlled the executive and legislative branches of government. Decreased competition was less common in states with higher proportions of residents who were Hispanic or ages 45-64 and states that chose to expand Medicaid.

Background: The Affordable Care Act introduced a major systematic change aimed to promote coordination across the care continuum. Yet, it remains unknown the extent to which hospital system structures have changed following the Affordable Care Act. The structure of hospital systems has important implications for the cost, quality, and accessibility of health services., Objectives: To assess trends in the structures of hospital systems., Research Design: We aggregated data from the American Hospital Association (AHA) Annual Survey to the system level. Using a panel of hospital systems from 2008 to 2015, we assessed trends in the number of hospital systems, their size, ownership characteristics, geospatial arrangements, and integration with outpatient services., Results: In the period 2008-2015, there was an increasing percentage of hospitals that were system affiliated as well as growth in the number of hospital systems. A greater percentage of hospital systems that were organized as moderately centralized systems transitioned to centralized systems than to decentralized systems (19.8% vs. 4.7%; P<0.001). In terms of geospatial arrangement, a greater percentage of hub-and-spoke systems moved to a regional design than to national systems (20.0% vs. 8.2%; P<0.05). An increasing trend over time toward greater integration with outpatient services was found in a measure of total system level integration with outpatient services., Conclusions: Our findings suggest that hospital systems may be moving toward more regional designs. In addition, the trend of increasing integration offered across hospital systems overall, and as portion of total integration, suggests that systems may be increasing their services along the continuum of care.