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    FreeTwo 2027 reports
    Medicare Advantage · South Carolina · enrollment Oct 2026

    Medicare Advantage in South Carolina: 551,257 members, 13 carriers, Humana in front.

    Humana holds 39.3% of South Carolina’s visible Medicare Advantage members, ahead of UnitedHealth at 25.6% and Aetna (CVS) at 11.4%. The market grew +4.9% (+25,791 members) from Nov 2025 to Oct 2026 and stepped +0.5% at the 2026 election period. 46.8% of the state's Medicare beneficiaries are in a Medicare Advantage plan.

    Visible members
    551,257
    Oct 2026
    Carriers
    13
    87 plans with members
    MA penetration
    46.8%
    of 1,297,493 eligible
    Twelve months
    +4.9%
    +25,791 members
    Election step
    +0.5%
    December to January 2026
    Top three
    76.2%
    HHI 2,468, moderately concentrated

    Every carrier with members in South Carolina

    Ranked by visible members in Oct 2026. The twelve-month change runs Nov 2025 to Oct 2026; the election step is the carrier’s own December-to-January change. Counties led counts counties where the carrier has the most visible members and at least one other carrier is visible. Humana leads 26 of the 46 counties with a lead. At the election period Independence Health Group, Inc. stepped up most (+1866.7%) and UnitedHealth stepped down most (−24.9%).

    #CarrierMembersShareTwelve monthsElection stepCounties ledRating$0 premiumPlans
    1Humana216,576
    39.3%
    		+26.1%+17.4%26 of 464.1398%24
    2UnitedHealth140,986
    25.6%
    		−23.5%−24.9%20 of 464.27100%12
    3Aetna (CVS)62,699
    11.4%
    		−27.2%−19.8%0 of 463.8596%16
    4BlueCross BlueShield of South Carolina (BCBSSC)49,286
    8.9%
    		+41.6%+30.1%0 of 303.50100%7
    5Devoted30,936
    5.6%
    		+235.3%+157.9%0 of 284.50100%8
    6Centene24,700
    4.5%
    		+7.8%+10.3%0 of 463.00100%7
    7Health Care Service Corporation16,038
    2.9%
    		+26.9%+12.4%0 of 163.0097%5
    8Clover Health Holdings, Inc.3,428
    0.6%
    		+85.6%+73.9%0 of 185.00100%3
    9Molina3,123
    0.6%
    		+235.8%+255.0%0 of 452.50100%1
    10Independence Health Group, Inc.2,495
    0.4%
    		+1644.8%+1866.7%0 of 38–100%1
    11UNICO Services, Inc.567
    0.1%
    		+21.1%+0.8%0 of 12–100%1
    12Missouri Healthcare Advisors, LLC406
    0.1%
    		+20.5%+2.5%0 of 84.50100%1
    13CuraCor Solutions Corp.17
    0.0%
    		+13.3%−15.4%0 of 14.00100%1

    South Carolina county by county

    46 counties with visible members, largest first. A county’s leader is the carrier with the most visible members there; a county with one visible carrier shows no leader, because the others are suppressed, not absent. Penetration is Medicare Advantage members as a share of the county’s Medicare beneficiaries.

    CountyVisible membersCarriersLeaderLeader shareMA penetrationDual eligibles
    Greenville54,85710Humana38.9%49.3%14,059
    Horry52,06711Humana39.7%45.7%10,752
    Spartanburg40,3249Humana48.8%54.3%11,800
    Richland32,5279Humana46.9%43.1%11,817
    Charleston27,88511Humana31.2%35.9%9,483
    Anderson26,15210Humana45.2%53.8%7,356
    Lexington26,0547Humana41.2%42.3%7,357
    York24,1929Humana32.5%46.5%5,782
    Berkeley19,84811Humana36.4%44.3%5,219
    Aiken18,00710Humana52.3%43.6%5,500
    Pickens15,6819Humana45.0%55.0%3,999
    Beaufort15,4228UnitedHealth34.5%32.6%3,011
    Florence14,4817UnitedHealth43.3%47.0%7,002
    Dorchester13,57210Humana35.2%43.2%3,713
    Orangeburg12,3199UnitedHealth58.1%59.0%5,437
    Sumter11,8068Humana54.6%50.0%5,393
    Oconee10,8937Humana50.4%47.4%2,756
    Lancaster10,5567UnitedHealth35.3%45.2%2,779
    Laurens9,1248Humana46.0%52.8%3,180
    Georgetown8,3489UnitedHealth40.4%42.0%2,387
    Greenwood8,0028Humana38.3%48.0%2,947
    Darlington7,9595UnitedHealth42.0%50.1%3,608
    Kershaw7,8029UnitedHealth39.4%48.3%2,523
    Cherokee7,3049Humana45.1%56.3%2,447
    Chesterfield5,2807Humana40.0%51.2%2,345
    Colleton5,19710UnitedHealth41.6%50.5%2,209
    Williamsburg5,0719UnitedHealth54.4%61.3%2,538
    Clarendon4,9066UnitedHealth46.2%53.2%2,162
    Marion4,5558UnitedHealth50.5%57.7%2,320
    Union4,5238Humana34.1%60.6%1,699
    Chester4,3708UnitedHealth42.3%55.1%1,660
    Newberry4,3468Humana51.3%44.8%1,621
    Dillon3,9908UnitedHealth44.5%59.5%2,058
    Jasper3,9459Humana43.5%38.7%1,060
    Marlboro3,8127UnitedHealth46.0%60.7%1,923
    Abbeville3,3437Humana45.3%50.4%1,028
    Fairfield3,26110Humana37.5%54.8%1,198
    Edgefield3,1138Humana52.5%50.0%1,070
    Barnwell2,6928UnitedHealth48.6%58.0%1,412
    Hampton2,5259UnitedHealth51.3%57.5%1,216
    Lee2,4176UnitedHealth46.6%56.4%1,171
    Calhoun1,9247UnitedHealth49.4%49.4%698
    Bamberg1,9219UnitedHealth63.8%59.2%1,051
    McCormick1,9106Humana40.3%48.6%515
    Saluda1,8296Humana42.8%40.5%654
    Allendale1,1456UnitedHealth60.6%59.8%704

    South Carolina's twelve months

    Visible Medicare Advantage members in South Carolina each month, Nov 2025 to Oct 2026. The December-to-January step is the election period; the rest of the year moves on new eligibles, special enrollment and deaths.

    Nov 2025 · 525,466Oct 2026 · 551,257

    What 2027 does to South Carolina

    The fate assigned to every plan for 2027, joined to the members in it today. A plan that ends sends its members to choose again; a plan dropping counties keeps the plan but not every county, and which counties is not stated.

    Plans that end
    734

    members in South Carolina are in plans that end for 2027.

    • Humana549
    • Health Care Service Corporation99
    • Devoted86
    Plans dropping counties
    137,510

    members are in plans that keep selling in South Carolina but drop at least one county for 2027.

    • Humana · 6 plans53,254
    • BlueCross BlueShield of South Carolina (BCBSSC) · 6 plans43,351
    • Aetna (CVS) · 11 plans40,834
    • UnitedHealth · 1 plans71

    The plans on sale in South Carolina for 2027

    Benefit design weighted by each plan’s members today, so a figure is what the market’s members are offered, not a count of plans. The rating is the 2027 overall Star Rating, weighted the same way.

    $0 premium
    99%

    of members are in a plan with no monthly premium

    In-network maximum
    $9,850

    median out-of-pocket maximum, member weighted

    Star Rating
    4.01

    2027 overall, member weighted

    Carrier Command · for Medicare Advantage plans

    The read on every carrier in South Carolina is in Carrier Command.

    A monthly position page for each of the 13 carriers here: risk and rebate against the market, Stars levers, the election-period forecast, county standing and the written read. Launching for Medicare Advantage plans.

    Request early access See Carrier Command

    Other states

    Every state has its own page; the largest carriers have one nationally.

    Humana in every state · UnitedHealth in every state · Aetna (CVS) in every state · All states and carriers

    How these numbers are made

    • Members are visible members: CMS suppresses any plan-county cell of ten or fewer, so small counties undercount. Market share excludes employer group plans.
    • Enrollment is Oct 2026; the twelve months run Nov 2025 to Oct 2026; the election step compares December 2025 with January 2026.
    • Plan fates are the ones assigned for contract year 2027; benefit design is the 2027 filing; the rating is the 2027 overall Star Rating of each carrier's contracts, weighted by members in South Carolina.
    • A carrier is a parent organization; its brands in South Carolina may carry other names. The rank 1st to 13th counts every parent with visible members in 2026.
    • Every figure comes from public CMS data as Livmor reads it, and the page is rebuilt when a new month posts. Livmor Carrier Command, public CMS data.