Medicare Advantage in Chatham County, Georgia
31,730 people in Chatham County, Georgia were enrolled in Medicare Advantage in October 2026, 55.0% of 57,730 eligible beneficiaries (+0.3 pts since October 2025). Humana Inc. is the largest parent organization with 34% of reported enrollment; 11 parent organizations have 11 or more members and the HHI is 2,422 (highly concentrated). For 2027, 789 members here are in plans that terminate or leave the county, and Health Care Service Corporation leaves. MA plans offered go from 54 to 49.
Parent organizations in Chatham County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 10,711 | +1,985 | 33.9% |
| UnitedHealth Group, Inc. | 9,616 | −560 | 30.4% |
| CVS Health Corporation | 4,938 | −724 | 15.6% |
| Elevance Health, Inc. | 2,143 | −663 | 6.8% |
| Centene Corporation | 1,948 | −112 | 6.2% |
| Devoted Health, Inc. | 1,127 | +823 | 3.6% |
| Clover Health Holdings, Inc. | 668 | +161 | 2.1% |
| Health Care Service Corporation | 271 | −81 | 0.9% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 79 | −7 | 0.3% |
| UNICO Services, Inc. | 78 | +12 | 0.2% |
| Highmark Health | 15 | 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, 11,224 beneficiaries in Chatham County were assigned to 172 Medicare Shared Savings Program ACOs, 59.9% 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.