Free tool · public CMS data
South Carolina Medicare Advantage market share
In September 2026, 595,987 South Carolina Medicare beneficiaries were enrolled in a Medicare Advantage plan across 91 parent carriers and 46 counties, led by Humana Inc. with 37.5% of counted enrollment.
Data month
September 2026
Advantage enrollees
595,987
+4.5% vs September 2025
Parent carriers
91
Advantage penetration
45.4%
CMS Medicare Monthly Enrollment, 2024
Carriers in South Carolina
CMS Monthly Enrollment by Contract/Plan/State/County (CPSC) · September 2026
| # | Parent organisation | Enrollees | Share | Counties | vs September 2025 |
|---|---|---|---|---|---|
| 1 | Humana Inc. | 223,198 | 37.5% | 46 | +25.8% |
| 2 | UnitedHealth Group, Inc. | 157,661 | 26.5% | 46 | -22.5% |
| 3 | CVS Health Corporation | 79,359 | 13.3% | 46 | -21.8% |
| 4 | BlueCross BlueShield of South Carolina (BCBSSC) | 49,034 | 8.2% | 46 | +42.8% |
| 5 | Devoted Health, Inc. | 30,486 | 5.1% | 37 | +234.7% |
| 6 | Centene Corporation | 24,736 | 4.2% | 46 | +6.2% |
| 7 | Health Care Service Corporation | 16,008 | 2.7% | 46 | +26.3% |
| 8 | Clover Health Holdings, Inc. | 3,410 | 0.6% | 28 | +87.0% |
| 9 | Elevance Health, Inc. | 3,181 | 0.5% | 46 | +4.8% |
| 10 | Molina Healthcare, Inc. | 3,121 | 0.5% | 46 | +227.5% |
| 11 | Independence Health Group, Inc. | 2,557 | 0.4% | 46 | +1651.4% |
| 12 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 1,261 | 0.2% | 46 | -2.4% |
| 13 | Highmark Health | 742 | 0.1% | 46 | +7.4% |
| 14 | UNICO Services, Inc. | 555 | 0.1% | 30 | +32.8% |
| 15 | Missouri Healthcare Advisors, LLC | 393 | 0.1% | 23 | +39.4% |
| 16 | CareFirst, Inc. | 112 | 0.0% | 46 | +119.6% |
| 17 | Horizon Mutual Holdings, Inc | 64 | 0.0% | 46 | +93.9% |
| 18 | Lifetime Healthcare, Inc. | 49 | 0.0% | 46 | +11.4% |
| 19 | CuraCor Solutions Corp. | 20 | 0.0% | 46 | +66.7% |
| 20 | MVP Health Care, Inc. | 16 | 0.0% | 46 | — |
| 21 | Blue Cross & Blue Shield of Rhode Island | 12 | 0.0% | 46 | +9.1% |
| 22 | Blue Cross and Blue Shield of Massachusetts, Inc. | 12 | 0.0% | 46 | — |
| 23 | Alignment Healthcare USA, LLC | 0 | 0.0% | 46 | — |
| 24 | Allina Health and Aetna Insurance Holding Company | 0 | 0.0% | 46 | — |
| 25 | Aspirus, Inc. | 0 | 0.0% | 1 | — |
| 26 | Athena Healthcare Holdings, LLC | 0 | 0.0% | 2 | — |
| 27 | ATRIO Health Plans | 0 | 0.0% | 1 | — |
| 28 | Aultman Health Foundation | 0 | 0.0% | 46 | — |
| 29 | Aware Integrated, Inc. | 0 | 0.0% | 46 | — |
| 30 | BayCare Health System, Inc. | 0 | 0.0% | 3 | — |
| 31 | Baylor Scott & White Health | 0 | 0.0% | 1 | — |
| 32 | Baystate Health, Inc. | 0 | 0.0% | 46 | — |
| 33 | Blue Cross Blue Shield of Arizona | 0 | 0.0% | 1 | — |
| 34 | Blue Cross Blue Shield of Kansas | 0 | 0.0% | 46 | — |
| 35 | Blue Cross Blue Shield of Nebraska | 0 | 0.0% | 46 | — |
| 36 | BlueCross BlueShield of Alabama | 0 | 0.0% | 46 | — |
| 37 | BlueCross BlueShield of Tennessee | 0 | 0.0% | 46 | — |
| 38 | BMC Health System, Inc. | 0 | 0.0% | 1 | — |
| 39 | California Physicians' Service | 0 | 0.0% | 46 | — |
| 40 | Cambia Health Solutions, Inc. | 0 | 0.0% | 46 | — |
| 41 | CAPITAL BLUE CROSS | 0 | 0.0% | 46 | — |
| 42 | CareSource | 0 | 0.0% | 9 | — |
| 43 | Clever Care Health Plan, Inc. | 0 | 0.0% | 1 | — |
| 44 | Corewell Health | 0 | 0.0% | 46 | — |
| 45 | Curana Health Holdings, LLC | 0 | 0.0% | 1 | — |
| 46 | DLP Marquette Health Plan, LLC | 0 | 0.0% | 1 | — |
| 47 | Elderplan, Inc. | 0 | 0.0% | 1 | — |
| 48 | EmblemHealth, Inc. | 0 | 0.0% | 46 | — |
| 49 | Fallon Community Health Plan, Inc. | 0 | 0.0% | 46 | — |
| 50 | Fenyx Health Holdings, Inc. | 0 | 0.0% | 46 | — |
| 51 | Gemstone Holdings, Inc. | 0 | 0.0% | 1 | — |
| 52 | General Catalyst Group Management Holdings LP | 0 | 0.0% | 46 | — |
| 53 | Gold Kidney Health Plan | 0 | 0.0% | 1 | — |
| 54 | Guidewell Mutual Holding Corporation | 0 | 0.0% | 46 | — |
| 55 | Hamaspik of Rockland County, Inc. | 0 | 0.0% | 1 | — |
| 56 | Hawaii Medical Service Association | 0 | 0.0% | 46 | — |
| 57 | Healthfirst, Inc. | 0 | 0.0% | 46 | — |
| 58 | HealthPartners, Inc. | 0 | 0.0% | 46 | — |
| 59 | Henry Ford Health System | 0 | 0.0% | 46 | — |
| 60 | Imperial Health Plan of California | 0 | 0.0% | 1 | — |
| 61 | Independent Health Association, Inc. | 0 | 0.0% | 46 | — |
| 62 | Johns Hopkins Healthcare LLC | 0 | 0.0% | 46 | — |
| 63 | Kaiser Foundation Health Plan, Inc. | 0 | 0.0% | 12 | — |
| 64 | Liberty Healthcare Insurance | 0 | 0.0% | 1 | — |
| 65 | LifeBridge Health, Inc. | 0 | 0.0% | 1 | — |
| 66 | Local Initiative Health Authority for LA County | 0 | 0.0% | 1 | — |
| 67 | Longevity Health Founders, LLC | 0 | 0.0% | 2 | — |
| 68 | Louisiana Health Service & Indemnity Company | 0 | 0.0% | 46 | — |
| 69 | Lumeris Group Holdings Corporation | 0 | 0.0% | 1 | — |
| 70 | Martin's Point Health Care, Inc. | 0 | 0.0% | 46 | — |
| 71 | Mass General Brigham Incorporated | 0 | 0.0% | 3 | — |
| 72 | Medica Holding Company | 0 | 0.0% | 46 | — |
| 73 | MEDICAL MUTUAL OF OHIO | 0 | 0.0% | 46 | — |
| 74 | MHH Healthcare, L.P. | 0 | 0.0% | 2 | — |
| 75 | NEIGHBORHOOD HEALTH PLAN OF RHODE ISLAND | 0 | 0.0% | 2 | — |
| 76 | Network Health, Inc. | 0 | 0.0% | 46 | — |
| 77 | Point32Health, Inc. | 0 | 0.0% | 3 | — |
| 78 | Presbyterian Healthcare Services | 0 | 0.0% | 1 | — |
| 79 | Risant Health, Inc. | 0 | 0.0% | 6 | — |
| 80 | SCAN Group | 0 | 0.0% | 5 | — |
| 81 | Sentara Health Care (SHC) | 0 | 0.0% | 1 | — |
| 82 | The Health Plan of West Virginia, Inc. | 0 | 0.0% | 46 | — |
| 83 | Thomas Jefferson University | 0 | 0.0% | 3 | — |
| 84 | Trinity Health Corporation | 0 | 0.0% | 4 | — |
| 85 | Troy Holdings, Inc. | 0 | 0.0% | 1 | — |
| 86 | Universal Health Services, Inc. | 0 | 0.0% | 4 | — |
| 87 | UPMC Health System | 0 | 0.0% | 46 | — |
| 88 | USAble Mutual Insurance Company | 0 | 0.0% | 46 | — |
| 89 | VISITING NURSE ASSOCIATION OF CENTRAL NEW YORK | 0 | 0.0% | 1 | — |
| 90 | Visiting Nurse Service of New York | 0 | 0.0% | 1 | — |
| 91 | Zing Health Consolidator, Inc | 0 | 0.0% | 1 | — |
County view
Leading carrier and Advantage enrollment in each South Carolina county. Penetration is from CMS Medicare Monthly Enrollment, 2024.
| County | Advantage enrollees | Leading carrier | Leader share | Carriers | Penetration |
|---|---|---|---|---|---|
| Horry | 62,668 | Humana Inc. | 35.7% | 65 | 43.7% |
| Greenville | 58,457 | Humana Inc. | 37.5% | 60 | 48.0% |
| Spartanburg | 41,671 | Humana Inc. | 48.0% | 59 | 52.8% |
| Richland | 34,184 | Humana Inc. | 45.0% | 58 | 41.2% |
| Charleston | 31,122 | UnitedHealth Group, Inc. | 31.8% | 60 | 35.9% |
| Lexington | 27,877 | Humana Inc. | 39.3% | 60 | 39.7% |
| Anderson | 27,173 | Humana Inc. | 43.8% | 53 | 52.4% |
| York | 26,730 | Humana Inc. | 32.0% | 58 | 45.0% |
| Berkeley | 21,509 | Humana Inc. | 34.4% | 55 | 42.1% |
| Beaufort | 20,151 | UnitedHealth Group, Inc. | 34.5% | 58 | 33.1% |
| Aiken | 19,967 | Humana Inc. | 48.5% | 57 | 42.8% |
| Pickens | 16,374 | Humana Inc. | 43.8% | 54 | 52.5% |
| Florence | 15,069 | UnitedHealth Group, Inc. | 43.9% | 53 | 44.8% |
| Dorchester | 14,693 | Humana Inc. | 33.3% | 55 | 41.3% |
| Orangeburg | 12,715 | UnitedHealth Group, Inc. | 57.7% | 53 | 56.6% |
| Lancaster | 12,302 | UnitedHealth Group, Inc. | 35.6% | 54 | 43.6% |
| Sumter | 12,166 | Humana Inc. | 53.1% | 53 | 48.4% |
| Oconee | 11,785 | Humana Inc. | 47.6% | 53 | 45.9% |
| Georgetown | 9,673 | UnitedHealth Group, Inc. | 38.7% | 54 | 42.2% |
| Laurens | 9,244 | Humana Inc. | 45.8% | 53 | 51.8% |
| Greenwood | 8,356 | Humana Inc. | 38.2% | 53 | 46.4% |
| Darlington | 8,228 | UnitedHealth Group, Inc. | 42.8% | 51 | 49.2% |
| Kershaw | 8,172 | UnitedHealth Group, Inc. | 39.8% | 54 | 44.0% |
| Cherokee | 7,399 | Humana Inc. | 45.0% | 52 | 55.0% |
| Chesterfield | 5,394 | Humana Inc. | 40.2% | 51 | 49.1% |
| Colleton | 5,325 | UnitedHealth Group, Inc. | 41.5% | 53 | 49.3% |
| Williamsburg | 5,171 | UnitedHealth Group, Inc. | 54.1% | 53 | 58.4% |
| Clarendon | 5,094 | UnitedHealth Group, Inc. | 45.7% | 52 | 50.9% |
| Marion | 4,583 | UnitedHealth Group, Inc. | 50.7% | 54 | 55.3% |
| Jasper | 4,552 | Humana Inc. | 39.2% | 54 | 44.1% |
| Union | 4,552 | Humana Inc. | 33.7% | 52 | 59.2% |
| Newberry | 4,478 | Humana Inc. | 50.5% | 53 | 43.8% |
| Chester | 4,438 | UnitedHealth Group, Inc. | 42.1% | 53 | 53.8% |
| Dillon | 4,037 | UnitedHealth Group, Inc. | 44.1% | 52 | 56.0% |
| Marlboro | 3,864 | UnitedHealth Group, Inc. | 45.7% | 51 | 57.4% |
| Abbeville | 3,366 | Humana Inc. | 45.4% | 54 | 50.0% |
| Fairfield | 3,350 | Humana Inc. | 36.6% | 53 | 52.5% |
| Edgefield | 3,348 | Humana Inc. | 49.3% | 55 | 48.3% |
| Barnwell | 2,720 | UnitedHealth Group, Inc. | 48.5% | 53 | 53.1% |
| Hampton | 2,547 | UnitedHealth Group, Inc. | 51.2% | 53 | 54.3% |
| Lee | 2,420 | UnitedHealth Group, Inc. | 46.9% | 51 | 54.2% |
| McCormick | 2,188 | Humana Inc. | 36.5% | 54 | 48.6% |
| Calhoun | 1,961 | UnitedHealth Group, Inc. | 49.8% | 54 | 49.8% |
| Bamberg | 1,936 | UnitedHealth Group, Inc. | 62.8% | 53 | 57.1% |
| Saluda | 1,832 | Humana Inc. | 42.6% | 54 | 45.9% |
| Allendale | 1,146 | UnitedHealth Group, Inc. | 60.2% | 54 | 60.2% |
What is missing
CMS suppresses any plan-county cell with fewer than 11 enrollees. Those enrollees are missing from these counts, so every figure is a floor, not an exact total.
What is counted
Counts cover Medicare Advantage contracts only (Local CCP, Regional CCP, PFFS and MSA). Standalone Part D drug plans, cost plans, HCPP and PACE contracts are excluded.
Source: CMS Monthly Enrollment by Contract/Plan/State/County (CPSC).