How is Medicare Advantage developing in Washington?
Data through February 2026 · Updated June 15, 2026
live
Washington's MA penetration is 56.1% — below the 57.8% national share by 1.7 points, ranking 28 of 52 with 0.942M MA enrollees of 1.68M Medicare beneficiaries as of February 2026.
#28
National rank (of 52)
February 2026
0.942M
MA enrollees
February 2026
10.4%
Dual-eligible share of Medicare
2025 Q4
County detail
No Washington counties are in the current tracked set. County-level pages for every state arrive with the full CPSC county pipeline — see methodology.
Sales playbook one-pager
↓ Download the Washington sales playbook (PNG): a branded snapshot of penetration, runway class, carrier positions, D-SNP gap, and contestable members for this state. Runway class and score are a MedicareInsights modeled index, never citable as CMS data; source vintages are printed on the image.
So what / Now what
Washington is a switcher market — expansion means winning members from incumbent MA plans on benefits, network, and brand.
- Compare against neighboring states on the national table.
- Check 2026 plan exits for orphaned membership contestable in this market.
- Sales teams: see where this state ranks on the growth runway index and which competitive facts apply on the carrier battlecards.
Provenance — MA enrollment & penetration by state
- Source file
- CMS Medicare Monthly Enrollment (data.cms.gov, public API)
- Vintage
- February 2026
- Last updated
- June 15, 2026
- Refresh cadence
- Monthly (CMS publishes ~3 months in arrears)
- Method
- State-level rows pulled from the Medicare Monthly Enrollment API; MA share = MA_AND_OTH_BENES / TOT_BENES. Refreshed via automated pipeline from the CMS public API.
- Known limitations
- Penetration here is share of all Medicare beneficiaries (Parts A and/or B), not the KFF eligible-only basis, which runs ~4pts higher.