• Nathalie Huguet, Tahlia Hodes, Shuling Liu, Miguel Marino, Teresa D Schmidt, Robert W Voss, Katherine D Peak, and Ana R Quiñones.
• From the Department of Family Medicine (NH, TH, SL, MM, KDP, ARQ); OHSU-PSU School of Public Health, Oregon Health & Science University, Portland, OR (MM, ARQ); Research Department, OCHIN Inc., Portland, OR (TDS, RWV).
• J Am Board Fam Med. 2023 Oct 11; 36 (5): 839850839-850.

BackgroundPatients have varying levels of chronic conditions and health insurance patterns as they become Medicare age-eligible. Understanding these dynamics will inform policies and reforms that direct capacity and resources for primary care clinics to care for these aging patients. This study 1) determined changes in chronic condition rates following Medicare age eligibility among patients with different insurance patterns and 2) estimated the number of chronically ill patients who remain inadequately insured post-Medicare eligibility among patients receiving care in community health centers.MethodWe used retrospective electronic health record data from 45,527 patients aged 62 to 68 from 990 community health centers in 25 states in 2014 to 2019. Insurance patterns (continuously insured, continuously uninsured, uninsured/discontinuously insured who gained insurance after age 65, lost insurance after age 65, discontinuously insured) and diagnosis of chronic conditions were defined at each visit pre- and post-Medicare eligibility. Difference-in-differences Poisson GEE models estimated changes of chronic condition rates by insurance groups pre- to post-Medicare age eligibility.ResultsPost-Medicare eligibility, 72% patients were continuously insured, 14% gained insurance; and 14% were uninsured or discontinuously insured. The prevalence of multimorbidity (≥2 chronic conditions) was 77%. Those who gained insurance had a significantly larger increase in the rate of documented chronic conditions from pre- to post-Medicare (DID: 1.06, 95%CI:1.05-1.07) compared with the continuously insured group.ConclusionsPost-Medicare age eligibility, a significant proportion of patients were diagnosed with new conditions leading to high burden of disease. One in 4 older adults continue to have inadequate health care coverage in their older age.© Copyright by the American Board of Family Medicine.

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