How is Medicare Advantage developing in Oregon?
Oregon's MA-and-other health plan share is 53.8% — above the 51.1% national share by 2.7 points, ranking 20 of 53 with 523,363 people in a Medicare Advantage or other Medicare health plan out of 972,585 Medicare beneficiaries, on the CMS state record for June 2026.
Share and enrollee counts are the CMS state record for June 2026 (Medicare Monthly Enrollment). Summing this state’s 36 county rows gives 53.8% on 972,585 beneficiaries, the same total as the state record. Both figures are published; the state record is canonical for the state. Dual counts are county-file aggregates.
County detail
All 36 Oregon counties are in the county explorer, with June 2026 MA & other health plan share, 12-month momentum and market size from the CMS Medicare Monthly Enrollment county file. Dedicated county pages are published for the highest-signal markets first; Oregon does not have one yet. How the county file is used.
Sales playbook one-pager
The Oregon state sales playbook PNG has been withdrawn. It was rendered from the February 2026 enrollment file and carried a Growth Runway class, both retired by the 2026-08-24 data audit. Use the county explorer for June 2026 health plan share, momentum and market size, and the carrier battlecards for competitive facts. Read the audit.
So what / Now what Interpretation
Oregon 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: rank this market on health-plan share headroom and momentum in the county explorer, and see which competitive facts apply on the carrier battlecards.
Provenance — MA & other health plan enrollment and share by state
- Source file
- Medicare Monthly Enrollment (CCW-derived national, state and county beneficiary counts; data.cms.gov dataset
d7fabe1e-d19b-4333-9eff-e80e0643f2fd, public API) - Vintage
- June 2026
- Last updated
- September 26, 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
- Health plan share here is measured against all Medicare beneficiaries (Parts A and/or B), not the KFF eligible-only basis, which runs ~4pts higher.