Medicare Advantage & Part D Enrollment Map

Enrollment by company, plan, and county · October 2026

Program

Company

Plan type

SNP plans

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Vibe-coded by Jonathan Pearlstein, see my portfolio

About this data

Source: CMS Monthly Enrollment by Contract/Plan/State/County (CPSC), October 2026. Medicare Advantage includes HMO, PPO, PFFS, MSA, SNP, employer group, cost, and PACE plans. Part D shows standalone prescription drug plans (PDPs); drug coverage inside MA plans is counted under Medicare Advantage. Companies are grouped by CMS parent organization. Counts under 11 are suppressed by CMS, so county totals are slightly understated and gray counties have no reported enrollment, not necessarily no coverage.