Medicare Advantage in DeKalb County, Georgia
72,248 people in DeKalb County, Georgia were enrolled in Medicare Advantage in October 2026, 60.1% of 120,191 eligible beneficiaries (+1.5 pts since October 2025). Humana Inc. is the largest parent organization with 30% of reported enrollment; 14 parent organizations have 11 or more members and the HHI is 1,880 (highly concentrated). For 2027, 4,355 members here are in plans that terminate or leave the county, and CareSource leaves. MA plans offered go from 59 to 55.
Parent organizations in DeKalb County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 21,751 | +4,576 | 30.2% |
| UnitedHealth Group, Inc. | 14,347 | −3,473 | 19.9% |
| CVS Health Corporation | 13,718 | −499 | 19.0% |
| Kaiser Foundation Health Plan, Inc. | 7,570 | +453 | 10.5% |
| Devoted Health, Inc. | 4,431 | +3,593 | 6.1% |
| Elevance Health, Inc. | 4,392 | −773 | 6.1% |
| Centene Corporation | 3,155 | −346 | 4.4% |
| Health Care Service Corporation | 1,888 | +52 | 2.6% |
| Clover Health Holdings, Inc. | 478 | +269 | 0.7% |
| UNICO Services, Inc. | 227 | +131 | 0.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 78 | +10 | 0.1% |
| CareSource | 28 | new | under 0.1% |
| Highmark Health | 15 | +2 | under 0.1% |
| California Physicians' Service | 11 | 0 | 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, 14,746 beneficiaries in DeKalb County were assigned to 167 Medicare Shared Savings Program ACOs, 53.1% of assignable Original Medicare beneficiaries. Together, roughly 81% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.