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Updated: Aug 11, 2025

Inverse Probability of Treatment Weighting Propensity Score using the Military Health System Data Repository and National Death Index
Published on: January 8, 2020
Substantial Growth In Medicare Advantage And Implications For Reform
Erin Trish1, Samuel Valdez2, Paul B Ginsburg3
1Erin Trish (etrish@usc.edu), University of Southern California, Los Angeles, California.
Abstract:
Medicare Advantage (MA) enrollment increased by 22.2 million beneficiaries (337.0 percent) from 2006 through 2022, whereas traditional Medicare enrollment declined by 1.0 million (-2.9 percent) over that period. In 2022, adjusted MA penetration was 49.9 percent nationally, and 24.0 percent of Medicare beneficiaries with Parts A and B lived in a county with adjusted MA penetration equal to or exceeding 60 percent.
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