Medicare Advantage in Carroll County, Maryland
7,946 people in Carroll County, Maryland were enrolled in Medicare Advantage in October 2026, 20.5% of 38,819 eligible beneficiaries (+0.1 pts since October 2025). CareFirst, Inc. is the largest parent organization with 26% of reported enrollment; 9 parent organizations have 11 or more members and the HHI is 1,744 (moderately concentrated). HRSA classifies the county as partly rural. For 2027, 2,690 members here are in plans that terminate or leave the county, and Humana Inc., SNP Holdings, LLC leave. MA plans offered go from 20 to 13.
Parent organizations in Carroll County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| CareFirst, Inc. | 2,025 | +936 | 25.7% |
| CVS Health Corporation | 1,669 | −393 | 21.2% |
| Humana Inc. | 1,329 | +219 | 16.9% |
| UnitedHealth Group, Inc. | 1,041 | −585 | 13.2% |
| Johns Hopkins Healthcare LLC | 767 | −14 | 9.7% |
| Kaiser Foundation Health Plan, Inc. | 580 | 0 | 7.4% |
| LifeBridge Health, Inc. | 373 | +109 | 4.7% |
| SNP Holdings, LLC | 64 | −22 | 0.8% |
| Elevance Health, Inc. | 22 | +2 | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 4,122 beneficiaries in Carroll County were assigned to 82 Medicare Shared Savings Program ACOs, 18.6% of assignable Original Medicare beneficiaries. Together, roughly 35% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.