Top 10 US Medicare Advantage Plans 2026

Medicare Advantage covers more than 55% of the nation's 67 million beneficiaries and attracts $450 billion in annual federal funding. But 2026 brings significant market changes: recent rate cuts have forced major carriers like UnitedHealth to exit select markets, triggering the most dramatic Medicare Advantage reshuffling in a decade. For beneficiaries choosing or reconsidering plans, understanding which carriers offer stable, widely-available coverage is essential. We've ranked the 10 largest Medicare Advantage plans by total enrollment to help you identify the most established options likely to serve your area in 2026.