MA Enrollment Explorer / States / South Carolina
Medicare Advantage in South Carolina: enrollment, penetration and market share
606,606 people in South Carolina were enrolled in Medicare Advantage in October 2026. 46.8% of the state's 1,297,493 eligible Medicare beneficiaries are in Medicare Advantage, +0.1 pts since October 2025. Humana Inc. is the largest parent organization with 37% of reported enrollment; 26 parent organizations have 11 or more members, and the market's HHI is 2,385 (highly concentrated). Through the 2026 Annual Election Period (December to February), reported MA enrollment in South Carolina changed by +5,243 (+0.9%).
46.8%MA penetration, October 2026
607KMA enrollees
26parent organizations (11+ members)
2,385HHI, highly concentrated
Parent organizations in South Carolina
| Parent organization | Members | Change | Share | Share change |
|---|---|---|---|---|
| Humana Inc. | 224,916 | +46,451 | 37.3% | +6.7 pts |
| UnitedHealth Group, Inc. | 159,459 | −45,821 | 26.4% | −8.7 pts |
| CVS Health Corporation | 80,452 | −22,577 | 13.3% | −4.3 pts |
| BlueCross BlueShield of South Carolina (BCBSSC) | 49,417 | +14,841 | 8.2% | +2.3 pts |
| Devoted Health, Inc. | 31,198 | +21,976 | 5.2% | +3.6 pts |
| Centene Corporation | 24,967 | −629 | 4.1% | −0.2 pts |
| Health Care Service Corporation | 16,260 | +3,397 | 2.7% | +0.5 pts |
| Clover Health Holdings, Inc. | 3,497 | +1,628 | 0.6% | +0.3 pts |
| Elevance Health, Inc. | 3,284 | +141 | 0.5% | +0.01 pts |
| Molina Healthcare, Inc. | 3,123 | −288 | 0.5% | −0.1 pts |
| Independence Health Group, Inc. | 2,526 | −451 | 0.4% | −0.1 pts |
| Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 1,319 | −63 | 0.2% | −0.02 pts |
| Highmark Health | 841 | +51 | 0.1% | +0.00 pts |
| UNICO Services, Inc. | 567 | +129 | under 0.1% | +0.02 pts |
| Prisma Health | 440 | +29 | under 0.1% | +0.00 pts |
| Missouri Healthcare Advisors, LLC | 406 | +93 | under 0.1% | +0.01 pts |
| BoldAge PACE, LLC | 122 | +106 | under 0.1% | +0.02 pts |
| CareFirst, Inc. | 121 | +40 | under 0.1% | +0.01 pts |
| UMWA Health and Retirement Funds | 121 | −2 | under 0.1% | −0.00 pts |
| Orangeburg Senior Helping Center, LLC | 96 | +6 | under 0.1% | +0.00 pts |
Change and share change are since October 2025. Shares are of reported enrollment in the CMS State/County/Contract file.