Health Affairs October 21, 2025
Editor’s Note
This article is part of a Health Affairs Forefront featured series, “Assessing The Evidence For MA Reform.” The series was developed and supported by the research firm, Stage Analytics, through a grant from Bristol Myers Squibb. The articles analysesʼ and conclusions remain that of the authors. Health Affairs retained review and editing rights, as well as the right to decline any articles that failed to meet Health Affairs Forefront editorial standards.
Over the past two decades, enrollment in Medicare Advantage (MA) grew significantly compared to traditional fee-for-service Medicare. Since 2003, MA enrollment increased steadily, and its market penetration exceeded fee-for-service in 2023. In 2024, around 54 percent of Medicare beneficiaries were enrolled in Medicare Advantage.
Fee-for-service Medicare consists...
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