Medicare Advantage in Horry County, South Carolina
63,587 people in Horry County, South Carolina were enrolled in Medicare Advantage in October 2026, 45.7% of 139,018 eligible beneficiaries (+0.4 pts since October 2025). Humana Inc. is the largest parent organization with 36% of reported enrollment; 22 parent organizations have 11 or more members and the HHI is 2,362 (highly concentrated). For 2027, 130 members here are in plans that terminate or leave the county, and CuraCor Solutions Corp. leaves. MA plans offered go from 39 to 41.
Parent organizations in Horry County
| Parent organization | Members | Change since October 2025 | Share |
|---|---|---|---|
| Humana Inc. | 22,475 | +5,819 | 35.5% |
| UnitedHealth Group, Inc. | 15,647 | −6,432 | 24.7% |
| BlueCross BlueShield of South Carolina (BCBSSC) | 12,215 | +3,394 | 19.3% |
| CVS Health Corporation | 6,076 | −2,318 | 9.6% |
| Devoted Health, Inc. | 2,764 | new | 4.4% |
| Centene Corporation | 1,853 | −12 | 2.9% |
| Elevance Health, Inc. | 717 | +4 | 1.1% |
| Clover Health Holdings, Inc. | 496 | +286 | 0.8% |
| Highmark Health | 277 | +24 | 0.4% |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 189 | −11 | 0.3% |
| Molina Healthcare, Inc. | 160 | −13 | 0.3% |
| CareFirst, Inc. | 84 | +25 | 0.1% |
| UMWA Health and Retirement Funds | 83 | −1 | 0.1% |
| Horizon Mutual Holdings, Inc | 70 | +32 | 0.1% |
| Lifetime Healthcare, Inc. | 52 | +10 | under 0.1% |
CMS suppresses county and contract counts of 10 or fewer; shares are of reported enrollment.
Value-based care alongside MA
In PY 2024, 22,321 beneficiaries in Horry County were assigned to 256 Medicare Shared Savings Program ACOs, 38.4% of assignable Original Medicare beneficiaries. Together, roughly 67% of all Medicare beneficiaries in the county are in Medicare Advantage or an MSSP ACO. See the ACOs in the MSSP Explorer.