Medicare Advantage in Mason County, West Virginia
4,219 people in Mason County, West Virginia were enrolled in Medicare Advantage in October 2026, 61.8% of 6,824 eligible beneficiaries (+1.9 pts since October 2025). Humana Inc. is the largest parent organization with 40% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 2,742 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 37 to 37.
Parent organizations in Mason County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 1,675 | +100 | 40.0% |
| CVS Health Corporation | 1,270 | +19 | 30.3% |
| UnitedHealth Group, Inc. | 483 | −94 | 11.5% |
| Highmark Health | 295 | −99 | 7.0% |
| West Virginia United Health System, Inc. | 226 | +161 | 5.4% |
| UMWA Health and Retirement Funds | 114 | −15 | 2.7% |
| The Health Plan of West Virginia, Inc. | 82 | +43 | 2.0% |
| SNP Holdings, LLC | 44 | +4 | 1.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,362 beneficiaries in Mason County were assigned to 19 Medicare Shared Savings Program ACOs, 61.4% of assignable Original Medicare beneficiaries. Together, roughly 85% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.