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Objective: Our objective was to identify the hospital- and community-related factors associated with the hospital-level rate of potentially unnecessary interfacility transfers (IFTs) for pediatric patients with asthma exacerbations., Methods: We analyzed California Emergency Department (ED) data from 2016 to 2019 to capture ED visits where a pediatric patient (age, 2-17 years) presented with an asthma exacerbation and was transferred to another ED or acute care hospital. The primary outcome was hospital-level rate of potentially unnecessary IFTs, defined as a visit where length of stay after transfer was <24 hours and no advanced services (eg, critical care) were used. Hospital- and community-related characteristics included urbanicity, teaching hospital status, availability of pediatric resources in the sending facility and patient's community, pediatric patient volume, and Social Vulnerability Index. We described and compared hospitals in the top quartile of potentially unnecessary IFT rate versus all others and used a multivariable modified Poisson model to identify factors associated with potentially unnecessary IFT., Results: A total of 325 sending hospitals were included, with a median 573 pediatric asthma visits (interquartile range, 183-1309) per hospital annually. Nearly half of the hospitals (145/325, 45%) sent a potentially unnecessary IFT. Most (90%) hospitals were urban, 9% were teaching hospitals, 5% had >500 beds, and 22% had a pediatric ED on-site. Factors associated with higher adjusted prevalence of potentially unnecessary IFT included availability of pediatric telehealth (prevalence ratio [PR], 1.5; 95% confidence interval [CI], 1.2-2.0), increased pediatric volume (eg, <1800 vs ≥10,000 visits: PR, 2.6; 95% CI, 1.4-4.7), and higher community Social Vulnerability Index (PR, 1.5; 95% CI, 1.1-1.9)., Conclusions: Several hospital- and community-related factors were associated with potentially unnecessary IFTs among pediatric patients presenting to the ED with asthma exacerbations. These findings provide insight into disparities in potentially unnecessary IFT across communities and can guide the development of future interventions., Competing Interests: Disclosure: The authors declare no conflict of interest., (Copyright © 2024 Wolters Kluwer Health, Inc. All rights reserved.)