AJMC October 4, 2022
Jeffrey Dong, MD, Alan M. Zaslavsky, PhD, John Z. Ayanian, MD, MPP, Bruce E. Landon, MD, MBA

Enrollees who join Medicare Advantage undergo significant turnover in the years following enrollment.

ABSTRACT

Objectives: To characterize the proportion of Medicare Advantage (MA) enrollees who switched insurers or disenrolled to traditional Medicare (TM) in the years immediately after first choosing to join an MA health plan.

Study Design: Retrospective analysis using 2012-2017 Medicare enrollment data.

Methods: We studied enrollees who joined MA between 2012 and 2016 and identified all enrollees who changed insurers (switched insurance or disenrolled to TM) at least once between the start of enrollment and the end of the study period. We categorized each change as switching insurers or disenrollment to TM, and by whether the previous insurer had exited the market.

Results: Among 6,520,169 new MA...

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