Market intelligence
Where is Medicare Advantage gaining or losing share, and how fast?
Penetration, momentum, and concentration — national to county.
Where is MA penetration highest — and where is the runway?
82.1%Puerto Rico, highest state
Data through February 2026 · live monthly feed
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Which counties are gaining MA share fastest?
+1.35 ptsMiami-Dade, FL YoY
Data through Plan year 2026, with 2023–2026 penetration history
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Has Medicare Advantage passed half of Medicare?
50.8%of Medicare, 2026
Plan year 2026 (Feb 2026 enrollment)
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Where are dual-eligible concentrations highest?
24.8%of Medicare in Mississippi
Data through 2025 Q4
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Coming soon
How concentrated is each state's MA market (HHI)?
State-level HHI concentration scores are on the public roadmap, arriving with the full-county enrollment pipeline.
Planned CMS source: MA Enrollment by State/County/Plan (CPSC)