Medicare Advantage in Fairfax City, Virginia
1,992 people in Fairfax City, Virginia were enrolled in Medicare Advantage in October 2026, 40.2% of 4,961 eligible beneficiaries (+0.6 pts since October 2025). Kaiser Foundation Health Plan, Inc. is the largest parent organization with 24% of reported enrollment; 6 parent organizations have 11 or more members and the HHI is 2,088 (highly concentrated). For 2027, 98 members here are in plans that terminate or leave the county. MA plans offered go from 33 to 34.
Parent organizations in Fairfax City
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Kaiser Foundation Health Plan, Inc. | 477 | +38 | 24.3% |
| Humana Inc. | 473 | +226 | 24.1% |
| UnitedHealth Group, Inc. | 437 | −32 | 22.3% |
| CVS Health Corporation | 328 | −70 | 16.7% |
| Elevance Health, Inc. | 234 | +1 | 11.9% |
| Sentara Health Care (SHC) | 14 | new | 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, 1,019 beneficiaries in Fairfax City were assigned to 40 Medicare Shared Savings Program ACOs, 51.4% 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.