Medicare Advantage in Columbia County, Florida
9,789 people in Columbia County, Florida were enrolled in Medicare Advantage in October 2026, 53.0% of 18,479 eligible beneficiaries (+0.3 pts since October 2025). Humana Inc. is the largest parent organization with 62% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 4,948 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 3,591 members here are in plans that terminate or leave the county, and CVS Health Corporation, Centene Corporation leave. MA plans offered go from 23 to 16.
Parent organizations in Columbia County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 6,039 | +842 | 61.9% |
| UnitedHealth Group, Inc. | 3,236 | −522 | 33.2% |
| CVS Health Corporation | 294 | +17 | 3.0% |
| Guidewell Mutual Holding Corporation | 91 | −28 | 0.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 37 | +3 | 0.4% |
| Centene Corporation | 36 | −87 | 0.4% |
| Elevance Health, Inc. | 17 | −5 | 0.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 954 beneficiaries in Columbia County were assigned to 60 Medicare Shared Savings Program ACOs, 15.2% of assignable Original Medicare beneficiaries. Together, roughly 60% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.