Medicare Advantage in Washington County, Maine
4,949 people in Washington County, Maine were enrolled in Medicare Advantage in October 2026, 46.8% of 10,569 eligible beneficiaries (+0.00 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 30% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 2,024 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 2,361 members here are in plans that terminate or leave the county, and Elevance Health, Inc. leaves. MA plans offered go from 18 to 11.
Parent organizations in Washington County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,463 | +348 | 29.8% |
| Martin's Point Health Care, Inc. | 1,113 | −153 | 22.7% |
| Centene Corporation | 741 | +105 | 15.1% |
| Elevance Health, Inc. | 658 | −132 | 13.4% |
| CVS Health Corporation | 656 | +22 | 13.4% |
| Humana Inc. | 272 | −89 | 5.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,408 beneficiaries in Washington County were assigned to 39 Medicare Shared Savings Program ACOs, 34.5% of assignable Original Medicare beneficiaries. Together, roughly 65% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.