Sanford Health in South Dakota: 4,789 Medicare Advantage members, 10.8% share, 5th of 5.
Sanford Health added 1,070 members (+28.8%) from Nov 2025 to Oct 2026 and stepped +18.5% at the 2026 election period against the market's −9.2%. It sells in 20 of South Dakota’s 51 counties with visible members and leads 2; Aetna (CVS) sits just ahead at 11.2%.
Sanford Health'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 Sanford Health'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 20 counties and leads 2 of them.
| County | Sanford Health members | Share of county | County visible members | County leader |
|---|---|---|---|---|
| Minnehaha | 3,077 | 34.0% | 9,057 | Sanford Health |
| Lincoln | 865 | 34.5% | 2,507 | Sanford Health |
| Roberts | 139 | 18.7% | 743 | Medica Holding Company |
| Brookings | 116 | 4.4% | 2,629 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. |
| Turner | 89 | 24.3% | 367 | Blue Cross Blue Shield of Michigan Mutual Ins. Co. |
Sanford Health 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, −0.09, 2nd of 4 rated
market 76%, +15 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 Sanford Health's plans in South Dakota
The fate assigned to each of the carrier’s plans for 2027, joined to the members in it today.
4,486 members are in 2 plans that end and must choose again. 303 members move with 2 plans consolidated into another of the carrier’s plans. In all, 100% of Sanford Health’s South Dakota members are in a plan whose service area or status changes.
The read on Sanford Health 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.
Sanford Health 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.
- Sanford Health is the parent organization Sanford Health; its 4 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.