Medicare Advantage in King William County, Virginia
1,667 people in King William County, Virginia were enrolled in Medicare Advantage in October 2026, 37.9% of 4,394 eligible beneficiaries (−0.1 pts since October 2025). Humana Inc. is the largest parent organization with 42% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 2,836 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 301 members here are in plans that terminate or leave the county. MA plans offered go from 27 to 23.
Parent organizations in King William County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 686 | +278 | 41.8% |
| Elevance Health, Inc. | 375 | −220 | 22.9% |
| UnitedHealth Group, Inc. | 332 | −2 | 20.2% |
| CVS Health Corporation | 202 | +27 | 12.3% |
| Devoted Health, Inc. | 35 | new | 2.1% |
| Sentara Health Care (SHC) | 11 | −73 | 0.7% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 958 beneficiaries in King William County were assigned to 20 Medicare Shared Savings Program ACOs, 47.4% of assignable Original Medicare beneficiaries. Together, roughly 67% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.