Medicare Advantage in Aiken County, South Carolina
20,241 people in Aiken County, South Carolina were enrolled in Medicare Advantage in October 2026, 43.7% of 46,371 eligible beneficiaries (+0.2 pts since October 2025). Humana Inc. is the largest parent organization with 48% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 3,374 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 0 members here are in plans that terminate or leave the county. MA plans offered go from 38 to 40.
Parent organizations in Aiken County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 9,710 | +2,538 | 48.2% |
| UnitedHealth Group, Inc. | 6,074 | −2,153 | 30.2% |
| CVS Health Corporation | 2,103 | −165 | 10.4% |
| BlueCross BlueShield of South Carolina (BCBSSC) | 927 | +229 | 4.6% |
| Centene Corporation | 497 | +55 | 2.5% |
| Elevance Health, Inc. | 297 | +29 | 1.5% |
| Clover Health Holdings, Inc. | 197 | +94 | 1.0% |
| UNICO Services, Inc. | 87 | +25 | 0.4% |
| Molina Healthcare, Inc. | 82 | −8 | 0.4% |
| Independence Health Group, Inc. | 66 | −14 | 0.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 57 | −2 | 0.3% |
| Missouri Healthcare Advisors, LLC | 29 | −6 | 0.1% |
| Highmark Health | 13 | −4 | 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, 12,296 beneficiaries in Aiken County were assigned to 137 Medicare Shared Savings Program ACOs, 63.5% of assignable Original Medicare beneficiaries. Together, roughly 79% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.