Medicare Advantage in Greenbrier County, West Virginia
5,298 people in Greenbrier County, West Virginia were enrolled in Medicare Advantage in October 2026, 52.7% of 10,044 eligible beneficiaries (+1.5 pts since October 2025). Humana Inc. is the largest parent organization with 41% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,617 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 26 members here are in plans that terminate or leave the county. MA plans offered go from 37 to 37.
Parent organizations in Greenbrier County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 2,158 | +159 | 40.9% |
| CVS Health Corporation | 1,126 | +66 | 21.4% |
| Highmark Health | 843 | +32 | 16.0% |
| UnitedHealth Group, Inc. | 773 | −70 | 14.7% |
| UMWA Health and Retirement Funds | 163 | −5 | 3.1% |
| SNP Holdings, LLC | 108 | −13 | 2.0% |
| The Health Plan of West Virginia, Inc. | 48 | +19 | 0.9% |
| Elevance Health, Inc. | 23 | new | 0.4% |
| C & O Employees' Hospital Association | 16 | +2 | 0.3% |
| West Virginia United Health System, Inc. | 14 | new | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 2,565 beneficiaries in Greenbrier County were assigned to 45 Medicare Shared Savings Program ACOs, 62.0% of assignable Original Medicare beneficiaries. Together, roughly 82% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.