Medicare Advantage in Barnwell County, South Carolina
2,872 people in Barnwell County, South Carolina were enrolled in Medicare Advantage in October 2026, 57.9% of 4,956 eligible beneficiaries (−0.5 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 47% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,919 (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 38 to 40.
Parent organizations in Barnwell County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,333 | −281 | 47.1% |
| Humana Inc. | 1,154 | +243 | 40.8% |
| CVS Health Corporation | 109 | −48 | 3.9% |
| Centene Corporation | 99 | +3 | 3.5% |
| Devoted Health, Inc. | 71 | new | 2.5% |
| Molina Healthcare, Inc. | 27 | +4 | 1.0% |
| Clover Health Holdings, Inc. | 23 | +11 | 0.8% |
| UNICO Services, Inc. | 13 | new | 0.5% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 300 beneficiaries in Barnwell County were assigned to 18 Medicare Shared Savings Program ACOs, 17.3% of assignable Original Medicare beneficiaries. Together, roughly 65% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.