Employer-Group Medicare Advantage Enrollment Trends Highlight Market Shifts

As of November 1, 2025, over 35.2 million individuals in the United States were enrolled in Medicare Advantage (MA) plans, according to data compiled from the Centers for Medicare & Medicaid Services (CMS) and analyzed by Mark Farrah Associates (MFA). Employer-group Medicare Advantage plans, also known as Medicare Advantage employer-group waiver plans (MA-EGWPs), accounted for 16.2% of total MA enrollment, representing over 5.7 million members. This segment of the market experienced a modest growth of 0.35% compared to the previous year, adding nearly 20,000 new enrollees. The competitive landscape of employer-group MA plans is concentrated, with the top five carriers covering 83% of enrollees in this segment. UnitedHealth remains the leading carrier, serving more than 1.8 million members, although it saw a membership decline of 6.2% year over year. Geographic distribution highlights California as the largest state market for employer-group MA plans, with nearly 752,000 beneficiaries. These trends and market insights are drawn from monthly updated data provided by CMS and processed through MFA's Medicare Business Online™ platform, which streamlines the tracking of Medicare Advantage and Prescription Drug Plan (PDP) enrollments. The analysis supports health insurance professionals in understanding shifts in employer-based Medicare Advantage enrollment and informs strategic decision-making. Mark Farrah Associates specializes in health plan market data aggregation and analytics. Their resources help stakeholders navigate the complexities of the Medicare Advantage market by providing timely and detailed enrollment intelligence. The ongoing tracking of employer-group MA plan performance is critical for insurers, brokers, and healthcare providers aiming to optimize their participation in this segment of Medicare. Overall, the incremental growth in employer-group MA enrollment and the dominance of leading carriers underscore the evolving dynamics within Medicare Advantage. Market participants must monitor these trends closely given the significant role MA plans play in the broader Medicare ecosystem.