Medicare Advantage in Adams County, Washington
988 people in Adams County, Washington were enrolled in Medicare Advantage in October 2026, 34.8% of 2,839 eligible beneficiaries (−0.7 pts since October 2025). Centene Corporation is the largest parent organization with 43% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,070 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 403 members here are in plans that terminate or leave the county. MA plans offered go from 9 to 6.
Parent organizations in Adams County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Centene Corporation | 418 | +62 | 43.0% |
| Humana Inc. | 309 | +177 | 31.8% |
| Community Health Plan of Washington | 95 | −214 | 9.8% |
| Molina Healthcare, Inc. | 76 | −23 | 7.8% |
| UnitedHealth Group, Inc. | 75 | +6 | 7.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 934 beneficiaries in Adams County were assigned to 20 Medicare Shared Savings Program ACOs, 69.4% of assignable Original Medicare beneficiaries. Together, roughly 80% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.