Medicare Advantage in Oxford County, Maine
11,348 people in Oxford County, Maine were enrolled in Medicare Advantage in October 2026, 61.7% of 18,399 eligible beneficiaries (−0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 31% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 2,011 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 3,291 members here are in plans that terminate or leave the county. MA plans offered go from 21 to 17.
Parent organizations in Oxford County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 3,546 | +330 | 31.4% |
| Martin's Point Health Care, Inc. | 2,111 | −273 | 18.7% |
| Humana Inc. | 2,064 | +446 | 18.3% |
| Elevance Health, Inc. | 1,463 | −1 | 13.0% |
| Centene Corporation | 1,060 | 0 | 9.4% |
| CVS Health Corporation | 1,051 | −338 | 9.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,593 beneficiaries in Oxford County were assigned to 56 Medicare Shared Savings Program ACOs, 54.7% of assignable Original Medicare beneficiaries. Together, roughly 83% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.