Medicare Advantage plans in South Dakota, 2027
25 Medicare Advantage plans are sold in South Dakota for 2027 (27 in 2026); 18 are open to everyone and 5 of those have a $0 premium everywhere they are sold. 19,094 South Dakota members in September 2026 were in plans that end or leave their county for 2027.
What changes in South Dakota for 2027?
| In the state | 2026 | 2027 | Change |
|---|---|---|---|
| Plans sold in the state | 27 | 25 | ▼down 2 |
| Plans open to everyone | 21 | 18 | ▼down 3 |
| Plans with a $0 premium everywhere they are sold | 6 | 5 | ▼down 1 |
| Plans that lower the Part B premium | 3 | 3 | no change |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan benefit package files, 2027 and 2026.
Which companies sell the most plans in South Dakota?
Plans open to everyone, by parent company and the brands it sells under, 2027
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
Which South Dakota counties lose the most?
Plans end in or leave South Dakota counties 420 times for 2027. Counties with the most members in those plans come first; each links to its 2027 plan list.
| County | Plans open to all | $0 premium | Plans that end or leave | Their members here |
|---|---|---|---|---|
| Minnehaha | 14 | 4 | 6 | 5,192 |
| Pennington | 5 | 2 | 4 | 2,215 |
| Lincoln | 14 | 4 | 6 | 1,751 |
| Brookings | 12 | 5 | 5 | 1,426 |
| Davison | 5 | 2 | 8 | 997 |
| Lawrence | 5 | 2 | 4 | 960 |
| Meade | 5 | 2 | 4 | 588 |
| Codington | 5 | 2 | 1 | 489 |
| Roberts | 7 | 2 | 5 | 383 |
| Butte | 5 | 2 | 4 | 381 |
| Custer | 5 | 2 | 4 | 291 |
| Yankton | 12 | 4 | 4 | 273 |
| Walworth | 5 | 2 | 15 | 265 |
| Turner | 14 | 4 | 6 | 250 |
| Day | 7 | 2 | 10 | 233 |
| Lake | 14 | 4 | 6 | 222 |
| Kingsbury | 7 | 2 | 10 | 202 |
| Clay | 14 | 4 | 6 | 198 |
| Deuel | 7 | 2 | 10 | 194 |
| Fall River | 5 | 2 | 4 | 194 |
| Perkins | 5 | 2 | 10 | 172 |
| Beadle | 7 | 1 | 7 | 169 |
| McCook | 14 | 4 | 6 | 147 |
| Charles Mix | 7 | 1 | 9 | 134 |
| Clark | 7 | 2 | 10 | 130 |
| Marshall | 7 | 2 | 10 | 121 |
| Hutchinson | 9 | 1 | 11 | 120 |
| Bon Homme | 7 | 1 | 9 | 110 |
| Moody | 14 | 4 | 6 | 106 |
| Hanson | 9 | 1 | 11 | 103 |
| Sanborn | 7 | 2 | 10 | 101 |
| Spink | 5 | 2 | 6 | 96 |
| Campbell | 5 | 2 | 15 | 91 |
| Hamlin | 5 | 2 | 6 | 86 |
| Union | 12 | 4 | 4 | 85 |
| Haakon | 5 | 2 | 11 | 70 |
| Miner | 9 | 1 | 11 | 68 |
| Douglas | 9 | 1 | 11 | 63 |
| Jackson | 5 | 2 | 11 | 60 |
| Brown | 7 | 1 | 2 | 56 |
| Aurora | 7 | 1 | 9 | 55 |
| Edmunds | 6 | 0 | 4 | 45 |
| Brule | 6 | 0 | 7 | 40 |
| Corson | 5 | 2 | 15 | 36 |
| Harding | 5 | 2 | 10 | 30 |
| Dewey | 5 | 2 | 10 | 24 |
| Hughes | 6 | 0 | 2 | 19 |
| Grant | 6 | 0 | 2 | 14 |
| McPherson | 6 | 0 | 4 | 14 |
| Jerauld | 6 | 0 | 9 | 13 |
| Gregory | 6 | 0 | 7 | 12 |
| Bennett | 6 | 0 | 2 | 0 |
| Buffalo | 6 | 0 | 7 | 0 |
| Faulk | 6 | 0 | 2 | 0 |
| Hand | 6 | 0 | 2 | 0 |
| Hyde | 6 | 0 | 2 | 0 |
| Jones | 6 | 0 | 2 | 0 |
| Lyman | 6 | 0 | 2 | 0 |
| Mellette | 6 | 0 | 2 | 0 |
| Oglala Lakota | 6 | 0 | 2 | 0 |
| Potter | 6 | 0 | 2 | 0 |
| Shannon | 0 | 0 | 0 | 0 |
| Stanley | 6 | 0 | 2 | 0 |
| Sully | 6 | 0 | 2 | 0 |
| Todd | 6 | 0 | 2 | 0 |
| Tripp | 6 | 0 | 2 | 0 |
| Washabaugh | 0 | 0 | 0 | 0 |
| Ziebach | 5 | 2 | 10 | 0 |
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).
Which large plans sold in South Dakota end?
| 2026 plan | Brand | Members in all states, Sept. 2026 |
|---|---|---|
| Blue Medicare Advantage Enhanced PPOH5900-004 | Wellmark Advantage Health Plan | 9,686 |
| Align ChoicePlusH8385-003 | Align powered by Sanford Health Plan | 3,834 |
| Medica Prime Solution Core w/RxH2450-035 | Medica | 1,391 |
| Align ChoiceEliteH8385-001 | Align powered by Sanford Health Plan | 925 |
| Blue Medicare Advantage Classic PPOH5900-008 | Wellmark Advantage Health Plan | 584 |
| Medica Prime Solution Premier w/RxH2450-037 | Medica | 376 |
| Blue Medicare Advantage Valor PPOH5900-007 | Wellmark Advantage Health Plan | 304 |
Source: CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026); CMS monthly enrollment by plan and by county, September 2026 (CMS hides counts under 11).
Which plans in South Dakota lower the Part B premium?
3 plans open to everyone and sold in at least one South Dakota county pay part of the Part B premium in 2027; the largest reduction comes first.
| 2027 plan | Brand | Monthly reduction |
|---|---|---|
| Medica Advantage SaluteH8889-009 | Medica | $160 |
| AARP Medicare Advantage Patriot No Rx SI-MA2H2001-139 | UnitedHealthcare | $115 |
| Aetna Medicare Eagle ClassicH1608-061 | Aetna Medicare | $100 |
Source: CMS plan benefit package files, 2027 and 2026; CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision).
Which South Dakota counties have no Medicare Advantage plan open to everyone in 2027?
2 counties in South Dakota have no plan open to everyone for 2027: people there can use Original Medicare with a stand-alone drug plan and a Medigap policy, or a special needs plan if they qualify.
Shannon, SD
No Medicare Advantage plan open to everyone is sold in Shannon, South Dakota for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in South Dakota.
Washabaugh, SD
No Medicare Advantage plan open to everyone is sold in Washabaugh, South Dakota for 2027. 0 plans were sold here in 2026; 0 of them leave. People here can use Original Medicare with one of the 9 stand-alone drug plans offered in South Dakota.
Source: CMS Medicare Advantage and Part D landscape files for 2027 (Sept. 22, 2026, revised Sept. 30) and 2026 (Sept. 2, 2026 revision); CMS plan crosswalk from 2026 to 2027 (Oct. 1, 2026).
73,086 of South Dakota's 208,048 people with Medicare were in a Medicare Advantage plan in September 2026 (35%).
What else should you check?
- Every plan not offered in 2027By company and state
- Part B giveback plansWhere they are sold
- Every statePlan counts for 2027