Medicare Advantage in Williamsburg City, Virginia
757 people in Williamsburg City, Virginia were enrolled in Medicare Advantage in October 2026, 24.6% of 3,072 eligible beneficiaries (−1.9 pts since October 2025). Humana Inc. is the largest parent organization with 41% of reported enrollment; 5 parent organizations have 11 or more members and the HHI is 3,065 (highly concentrated). For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 37 to 39.
Parent organizations in Williamsburg City
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 297 | +157 | 40.7% |
| UnitedHealth Group, Inc. | 242 | −18 | 33.2% |
| Elevance Health, Inc. | 103 | −64 | 14.1% |
| CVS Health Corporation | 73 | −10 | 10.0% |
| Sentara Health Care (SHC) | 14 | −92 | 1.9% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 829 beneficiaries in Williamsburg City were assigned to 31 Medicare Shared Savings Program ACOs, 52.9% of assignable Original Medicare beneficiaries. Together, roughly 64% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.