Medicare Advantage in Greenville County, South Carolina
59,066 people in Greenville County, South Carolina were enrolled in Medicare Advantage in October 2026, 49.3% of 119,774 eligible beneficiaries (−0.2 pts since October 2025). Humana Inc. is the largest parent organization with 37% of reported enrollment; 16 parent organizations have 11 or more members and the HHI is 2,424 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 26 members here are in plans that terminate or leave the county. MA plans offered go from 51 to 51.
Parent organizations in Greenville County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 22,009 | +3,256 | 37.4% |
| CVS Health Corporation | 15,859 | −2,236 | 26.9% |
| UnitedHealth Group, Inc. | 8,403 | −2,487 | 14.3% |
| Devoted Health, Inc. | 3,249 | +2,132 | 5.5% |
| BlueCross BlueShield of South Carolina (BCBSSC) | 3,099 | +787 | 5.3% |
| Health Care Service Corporation | 2,543 | +542 | 4.3% |
| Centene Corporation | 2,505 | −445 | 4.3% |
| Molina Healthcare, Inc. | 310 | −19 | 0.5% |
| Elevance Health, Inc. | 251 | +29 | 0.4% |
| Independence Health Group, Inc. | 215 | −22 | 0.4% |
| Prisma Health | 168 | +13 | 0.3% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 151 | −16 | 0.3% |
| Missouri Healthcare Advisors, LLC | 43 | −1 | under 0.1% |
| Highmark Health | 31 | +3 | under 0.1% |
| CareFirst, Inc. | 13 | 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, 11,183 beneficiaries in Greenville County were assigned to 197 Medicare Shared Savings Program ACOs, 24.3% of assignable Original Medicare beneficiaries. Together, roughly 62% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.