Medicare Advantage in Dillon County, South Carolina
4,151 people in Dillon County, South Carolina were enrolled in Medicare Advantage in October 2026, 59.5% of 6,981 eligible beneficiaries (+0.7 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 44% of reported enrollment; 8 parent organizations have 11 or more members and the HHI is 3,224 (highly concentrated). HRSA classifies the county as fully rural. For 2027, 194 members here are in plans that terminate or leave the county. MA plans offered go from 34 to 35.
Parent organizations in Dillon County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 1,805 | −333 | 43.7% |
| Humana Inc. | 1,409 | +369 | 34.1% |
| CVS Health Corporation | 389 | −45 | 9.4% |
| Centene Corporation | 215 | 0 | 5.2% |
| BlueCross BlueShield of South Carolina (BCBSSC) | 209 | +97 | 5.1% |
| UNICO Services, Inc. | 40 | +6 | 1.0% |
| Molina Healthcare, Inc. | 35 | −2 | 0.8% |
| Independence Health Group, Inc. | 24 | −6 | 0.6% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 945 beneficiaries in Dillon County were assigned to 19 Medicare Shared Savings Program ACOs, 42.3% of assignable Original Medicare beneficiaries. Together, roughly 77% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.