Medicare Advantage in Clarendon County, South Carolina
5,232 people in Clarendon County, South Carolina were enrolled in Medicare Advantage in October 2026, 53.2% of 9,840 eligible beneficiaries (+0.2 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 46% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 3,777 (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 31 to 33.
Parent organizations in Clarendon County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 2,367 | −412 | 45.5% |
| Humana Inc. | 2,084 | +523 | 40.1% |
| CVS Health Corporation | 458 | −18 | 8.8% |
| Centene Corporation | 219 | +9 | 4.2% |
| Molina Healthcare, Inc. | 30 | −7 | 0.6% |
| Independence Health Group, Inc. | 26 | −6 | 0.5% |
| Elevance Health, Inc. | 14 | +2 | 0.3% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 1,402 beneficiaries in Clarendon County were assigned to 28 Medicare Shared Savings Program ACOs, 39.4% of assignable Original Medicare beneficiaries. Together, roughly 72% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.