Medicare Advantage in Lexington County, South Carolina
28,259 people in Lexington County, South Carolina were enrolled in Medicare Advantage in October 2026, 42.3% of 66,867 eligible beneficiaries (+0.3 pts since October 2025). Humana Inc. is the largest parent organization with 39% of reported enrollment; 13 parent organizations have 11 or more members and the HHI is 2,695 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 1,665 members here are in plans that terminate or leave the county. MA plans offered go from 37 to 37.
Parent organizations in Lexington County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 11,014 | +2,917 | 39.2% |
| UnitedHealth Group, Inc. | 7,358 | −2,380 | 26.2% |
| BlueCross BlueShield of South Carolina (BCBSSC) | 5,194 | +832 | 18.5% |
| CVS Health Corporation | 3,148 | −296 | 11.2% |
| Centene Corporation | 930 | −16 | 3.3% |
| Molina Healthcare, Inc. | 175 | −43 | 0.6% |
| Elevance Health, Inc. | 99 | +6 | 0.4% |
| Independence Health Group, Inc. | 80 | −13 | 0.3% |
| Prisma Health | 52 | +4 | 0.2% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 35 | −2 | 0.1% |
| Highmark Health | 23 | +5 | under 0.1% |
| Health Care Service Corporation | 12 | new | under 0.1% |
| UMWA Health and Retirement Funds | 12 | +1 | 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, 3,305 beneficiaries in Lexington County were assigned to 116 Medicare Shared Savings Program ACOs, 10.8% of assignable Original Medicare beneficiaries. Together, roughly 49% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.