Medicare Advantage in Lancaster County, South Carolina
12,560 people in Lancaster County, South Carolina were enrolled in Medicare Advantage in October 2026, 45.2% of 27,792 eligible beneficiaries (−0.1 pts since October 2025). UnitedHealth Group, Inc. is the largest parent organization with 35% of reported enrollment; 10 parent organizations have 11 or more members and the HHI is 2,372 (highly concentrated). HRSA classifies the county as partly rural. For 2027, 15 members here are in plans that terminate or leave the county. MA plans offered go from 34 to 34.
Parent organizations in Lancaster County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| UnitedHealth Group, Inc. | 4,396 | −1,271 | 35.3% |
| Humana Inc. | 3,433 | +1,386 | 27.5% |
| Health Care Service Corporation | 1,633 | +556 | 13.1% |
| CVS Health Corporation | 1,530 | −1,108 | 12.3% |
| BlueCross BlueShield of South Carolina (BCBSSC) | 713 | new | 5.7% |
| Centene Corporation | 481 | +129 | 3.9% |
| Highmark Health | 93 | −4 | 0.7% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 68 | +4 | 0.5% |
| Molina Healthcare, Inc. | 66 | −16 | 0.5% |
| Elevance Health, Inc. | 56 | +4 | 0.4% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 6,607 beneficiaries in Lancaster County were assigned to 81 Medicare Shared Savings Program ACOs, 53.8% of assignable Original Medicare beneficiaries. Together, roughly 75% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.