UnitedHealth in South Dakota: 6,227 Medicare Advantage members, 14.1% share, 3rd of 5.
UnitedHealth Group, Inc., shown as UnitedHealth, lost 4,318 members (−40.9%) from Nov 2025 to Oct 2026 and stepped −44.5% at the 2026 election period against the market's −9.2%. It sells in 38 of South Dakota’s 51 counties with visible members and leads 4; Blue Cross Blue Shield of Michigan Mutual Ins. Co. sits just ahead at 23.6%, Aetna (CVS) just behind at 11.2%.
UnitedHealth's twelve months in South Dakota
Visible members each month, Nov 2025 to Oct 2026. The December-to-January step is the election period. The market line for the state is on the South Dakota page.
Where UnitedHealth's South Dakota members are
The carrier’s five largest counties by visible members, with its share of each county’s visible Medicare Advantage members. It sells in 38 counties and leads 4 of them.
| County | UnitedHealth members | Share of county | County visible members | County leader |
|---|---|---|---|---|
| Minnehaha | 1,418 | 15.7% | 9,057 | Sanford Health |
| Pennington | 1,305 | 15.5% | 8,427 | Medica Holding Company |
| Lawrence | 325 | 11.7% | 2,781 | Medica Holding Company |
| Lincoln | 298 | 11.9% | 2,507 | Sanford Health |
| Codington | 235 | 7.5% | 3,147 | Medica Holding Company |
UnitedHealth against the South Dakota market
The carrier’s figures beside the state’s, each weighted by members. A difference is a difference, not a grade: a higher maximum or a lower rating is a design and a result, read in context.
top three hold 78.0%
market 4.09, +0.41, 1st of 4 rated
market 76%, +24 points
market $7,150, +$2,700
| # | Carrier | Members | Share | Twelve months | Election step | Counties led | Rating | $0 premium |
|---|---|---|---|---|---|---|---|---|
| 1 | Medica Holding Company | 17,789 | 40.3% | +172.5% | +145.7% | 15 of 18 | 4.00 | 38% |
| 2 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. | 10,431 | 23.6% | −26.3% | −29.9% | 14 of 39 | – | – |
| 3 | UnitedHealth | 6,227 | 14.1% | −40.9% | −44.5% | 4 of 38 | 4.50 | 100% |
| 4 | Aetna (CVS) | 4,923 | 11.2% | −30.0% | −38.2% | 2 of 27 | 4.00 | 76% |
| 5 | Sanford Health | 4,789 | 10.8% | +28.8% | +18.5% | 2 of 20 | 4.00 | 91% |
What 2027 does to UnitedHealth's plans in South Dakota
The fate assigned to each of the carrier’s plans for 2027, joined to the members in it today.
Every one of UnitedHealth’s plans in South Dakota renews for 2027 unchanged in status and service area.
The read on UnitedHealth in South Dakota is in Carrier Command.
Risk and rebate against the market, the five-test read on coding versus selection, Stars levers and next year's cut points, the election-period forecast and the county-by-county standing, written as a monthly page.
UnitedHealth elsewhere, and the rest of South Dakota
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.
- UnitedHealth is the parent organization UnitedHealth Group, Inc.; its 3 plans in South Dakota may sell under other brand names. The rating is the 2027 overall Star Rating of its contracts weighted by members in South Dakota; $0 premium and the in-network maximum are the 2027 filings weighted by members today.
- Plan fates are the ones assigned for contract year 2027.
- 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.