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RESEARCH OBJECTIVE: Socioeconomic disparities in mental health care use can be mitigated by interventions to systematically improve disease diagnosis and treatment. Beginning 2010, Los Angeles County Departments of Health Services (DHS) and Mental Health (DMH) collaborated to increase access to effective mental health treatment. Implemented in staggered fashion among select safety‐net clinics, the Mental Health Integration Program (MHIP) embedded behavioral health specialists to co‐manage primary care patients (e.g., psychiatric consultation support for medication prescription, brief problem‐focused psychotherapy). This study examined whether clinic MHIP implementation was associated with higher treatment initiation (medication receipt and/or specialist follow‐up [for psychotherapy]) in safety‐net clinic sites. STUDY DESIGN: This retrospectively cohort study examined 33,537 primary care patients who were newly diagnosed with depression from June 30, 2009 to July 1, 2014 (n = 39,066 person‐years), using merged medical and pharmacy records from DHS and DMH. Patients were seen in one of 19 clinics that were either: (1) before, (2) after, or (3) had never implemented MHIP. We followed patients for 90 days after a new diagnosis, defined as having no diagnoses in the prior year. Then, we determined whether patients received antidepressant medication (prescription filled per pharmacy records) and/or mental health specialist follow‐up (completed referral documented in medical records). In multilevel regression models, we used MHIP implementation status to predict odds of treatment initiation, controlling for time and patient demographic and clinical characteristics (e.g., comorbidity). POPULATION STUDIED: 255,840 safety‐net patients seen in LA County. PRINCIPAL FINDINGS: In 30.1% of episodes, primary care patients received any treatment within 90 days of a new depression diagnosis (38.7% [after] vs 36.2% [before] vs 25.0% [never implemented MHIP in clinic]). 27.9% received medication within 90 days, while only 3% reached specialists. In multivariate analyses (n = 30,347 person‐years), we found that there was 2.35‐times odds of treatment initiation among patients in clinics after MHIP implementation (odds ratio [OR] = 2.35; 95% confidence interval [CI] = 2.18–2.55; p Latino > Black) than White patients, Spanish‐ than English‐speaking patients, and uninsured than insured patients in the study sample. CONCLUSIONS: Collaboration between two large, distinct health systems and its resulting integrated care programs were associated with greater odds of treatment initiation among patients newly diagnosed with depression, compared to patients in clinics before implementation or in clinics that did not implement. Findings suggest potential positive effects of targeted outreach (to minority and Spanish‐speaking patients) and possible leakage of insured patients to private sectors for depression treatment. IMPLICATIONS FOR POLICY OR PRACTICE: This evaluation is one of few to document effects from widescale implementation of integrated mental health care, in particular within the country's second largest public health system. Observed mental health integration programs may need further innovation to address current access gaps in mental health specialty care, such that evidence‐based psychotherapy options are also available to safety‐net primary care patients. PRIMARY FUNDING SOURCE: Department of Veterans Affairs.

BackgroundBeginning in 2010, Los Angeles County Departments of Health Services and Mental Health collaborated to increase access to effective mental health care. The Mental Health Integration Program (MHIP) embedded behavioral health specialists in primary care clinics to deliver brief, problem-focused treatments, and psychiatric consultation support for primary care-prescribed psychotropic medications.ObjectiveThe aim was to compare primary care visits associated with psychiatric diagnoses before and after MHIP implementation.MethodsThis retrospective cohort study (2009-2014) examined 62,945 patients from 8 safety-net clinics that implemented MHIP in a staggered manner in Los Angeles. Patients' primary care visits (n=695,354) were either associated or not with a previously identified or "new" (defined as having no diagnosis within the prior year) psychiatric diagnosis. Multilevel regression models used MHIP implementation to predict odds of visits being associated with psychiatric diagnoses, controlling for time, clinic, and patient characteristics.Results9.4% of visits were associated with psychiatric diagnoses (6.4% depression, 3.1% anxiety