Medicare Advantage in Chesterfield County, South Carolina
5,506 people in Chesterfield County, South Carolina were enrolled in Medicare Advantage in October 2026, 51.2% of 10,748 eligible beneficiaries (+0.7 pts since October 2025). Humana Inc. is the largest parent organization with 40% of reported enrollment; 7 parent organizations have 11 or more members and the HHI is 3,288 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 76 members here are in plans that terminate or leave the county. MA plans offered go from 29 to 30.
Parent organizations in Chesterfield County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 2,179 | +616 | 39.8% |
| UnitedHealth Group, Inc. | 2,140 | −484 | 39.1% |
| CVS Health Corporation | 658 | −32 | 12.0% |
| Centene Corporation | 272 | +39 | 5.0% |
| BlueCross BlueShield of South Carolina (BCBSSC) | 160 | +72 | 2.9% |
| Molina Healthcare, Inc. | 42 | −12 | 0.8% |
| Independence Health Group, Inc. | 26 | −1 | 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, 2,038 beneficiaries in Chesterfield County were assigned to 30 Medicare Shared Savings Program ACOs, 51.1% of assignable Original Medicare beneficiaries. Together, roughly 76% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.