Medicare Advantage in Frederick County, Maryland
10,939 people in Frederick County, Maryland were enrolled in Medicare Advantage in October 2026, 20.3% of 53,996 eligible beneficiaries (−0.5 pts since October 2025). Humana Inc. is the largest parent organization with 27% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 1,883 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 2,345 members here are in plans that terminate or leave the county, and CVS Health Corporation leaves. MA plans offered go from 23 to 17.
Parent organizations in Frederick County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 2,934 | +949 | 27.1% |
| CareFirst, Inc. | 2,358 | +1,054 | 21.8% |
| Kaiser Foundation Health Plan, Inc. | 2,027 | +81 | 18.7% |
| UnitedHealth Group, Inc. | 1,351 | −1,734 | 12.5% |
| CVS Health Corporation | 1,202 | −220 | 11.1% |
| Johns Hopkins Healthcare LLC | 735 | +77 | 6.8% |
| LifeBridge Health, Inc. | 156 | +109 | 1.4% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 30 | +1 | 0.3% |
| Elevance Health, Inc. | 29 | −1 | 0.3% |
| Highmark Health | 16 | 0 | 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, 8,330 beneficiaries in Frederick County were assigned to 135 Medicare Shared Savings Program ACOs, 27.9% of assignable Original Medicare beneficiaries. Together, roughly 43% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.