Medicare Advantage in Columbia County, Georgia
14,039 people in Columbia County, Georgia were enrolled in Medicare Advantage in October 2026, 46.3% of 30,339 eligible beneficiaries (+0.3 pts since October 2025). Humana Inc. is the largest parent organization with 40% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,720 (highly concentrated). For 2027, 172 members here are in plans that terminate or leave the county. MA plans offered go from 48 to 50.
Parent organizations in Columbia County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 5,585 | +1,315 | 39.9% |
| UnitedHealth Group, Inc. | 3,991 | −401 | 28.5% |
| CVS Health Corporation | 1,780 | −315 | 12.7% |
| Elevance Health, Inc. | 1,637 | −88 | 11.7% |
| Centene Corporation | 461 | −255 | 3.3% |
| Devoted Health, Inc. | 297 | +188 | 2.1% |
| Clover Health Holdings, Inc. | 153 | +74 | 1.1% |
| UNICO Services, Inc. | 40 | +9 | 0.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 28 | −2 | 0.2% |
| Highmark Health | 14 | new | 0.1% |
| Mitchell Family Office | 11 | new | 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, 7,650 beneficiaries in Columbia County were assigned to 100 Medicare Shared Savings Program ACOs, 67.1% of assignable Original Medicare beneficiaries. Together, roughly 82% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.