DOI: 10.1001/jamahealthforum.2026.1865 ISSN: 2689-0186
Insurer Retention of Stand-Alone Part D Plan Enrollees Switching to Medicare Advantage
Asa Hartman, Jingwei Sun, Michael E. Chernew, J. Michael McWilliamsThis cross-sectional study quantifies the extent to which Medicare beneficiaries who switched from stand-alone prescription drug plans to Medicare Advantage plans stayed with the same insurer.