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Two ways to define safety-net ambulatory practices—by share (institution based) vs volume (population based) of underserved patients dually eligible for Medicare and Medicaid—identify almost completely different groups of ambulatory practices. In a cross-sectional analysis of 2022 Medicare data, we examined 106,545 ambulatory practices serving 967,820 dually eligible beneficiaries to compare institution-based and population-based definitions of safety-net practices. Using an

Medicare Advantage (MA) plans offering supplemental benefits to help older adults remain independent at home are becoming more common, but these benefits remain limited in scope, inconsistently provided over time, and about half of plans require cost-sharing—raising concerns about meaningful access for aging beneficiaries. In a national analysis of 2020–2025 Medicare Advantage plan benefit package and enrollment data, the PROPEL team examined trends in supplemental benefits s

Medicare Advantage (MA) plans offering reduced cost-sharing for cardiologists are becoming more common, but access remains uneven across counties—this benefit is more concentrated among higher-quality plans but not consistently aligned with areas of greatest cardiovascular care need. In a cross-sectional analysis of 2022–2024 Medicare Advantage data, the PROPEL team examined plan benefits, enrollment, county-level cardiologist supply, cardiovascular care infrastructure, and H