Medicare Advantage in Prince William County, Virginia
24,606 people in Prince William County, Virginia were enrolled in Medicare Advantage in October 2026, 37.1% of 66,361 eligible beneficiaries (+0.3 pts since October 2025). Humana Inc. is the largest parent organization with 27% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 2,202 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 925 members here are in plans that terminate or leave the county. MA plans offered go from 32 to 32.
Parent organizations in Prince William County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 6,662 | +2,613 | 27.2% |
| Kaiser Foundation Health Plan, Inc. | 6,646 | +343 | 27.1% |
| UnitedHealth Group, Inc. | 5,077 | −631 | 20.7% |
| Elevance Health, Inc. | 3,407 | −205 | 13.9% |
| CVS Health Corporation | 2,484 | −598 | 10.1% |
| Sentara Health Care (SHC) | 112 | −230 | 0.5% |
| Johns Hopkins Healthcare LLC | 55 | new | 0.2% |
| CareFirst, Inc. | 36 | −1 | 0.1% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 17 | −1 | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 13,699 beneficiaries in Prince William County were assigned to 172 Medicare Shared Savings Program ACOs, 54.2% of assignable Original Medicare beneficiaries. Together, roughly 71% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.