Medicare Advantage in Cook County, Georgia
2,226 people in Cook County, Georgia were enrolled in Medicare Advantage in October 2026, 58.3% of 3,821 eligible beneficiaries (+0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 42% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 2,536 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 34 to 32.
Parent organizations in Cook County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 918 | +20 | 41.7% |
| CVS Health Corporation | 405 | +33 | 18.4% |
| Humana Inc. | 386 | −157 | 17.5% |
| Elevance Health, Inc. | 212 | −44 | 9.6% |
| Devoted Health, Inc. | 109 | new | 5.0% |
| Clover Health Holdings, Inc. | 100 | +52 | 4.5% |
| Centene Corporation | 70 | +4 | 3.2% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 631 beneficiaries in Cook County were assigned to 15 Medicare Shared Savings Program ACOs, 52.2% of assignable Original Medicare beneficiaries. Together, roughly 80% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.