Medicare in South Dakota
Medicare open enrollment in South Dakota: October 15 to December 7
Medicare's Annual Enrollment Period runs October 15 to December 7. What to know in South Dakota: the dates, plan changes CMS lists, free local counseling, and a checklist.
The dates
Medicare's Annual Enrollment Period runs October 15 to December 7. Whatever you choose in South Dakota during those weeks starts January 1. If you are already in a Medicare Advantage plan, you also get one change between January 1 and March 31.
The plans offered, their networks and their drug lists are set county by county, so what is available in Sioux Falls, Rapid City, and Aberdeen can differ from what is offered in a neighboring South Dakota county. Your ZIP code decides the list.
What CMS's lists show for South Dakota this year
CMS's 2027 plan list does not show 24 Medicare plans from 5 companies in some South Dakota counties that its 2026 list showed them in. CMS reports at least 48,870 South Dakota residents enrolled in those plans as of September 2026. Some counts are shown as minimums because CMS hides small numbers.
At least 25,485 of them are in counties where their company has no plan listed at all for 2027, and those members would generally need to choose a new plan this fall. Check the written notice from your plan; it is the only place that says what is happening to yours.
- Medicare plan changes for 2027 in South Dakota: plan names, counties and what to check
Free local counseling in South Dakota
South Dakota's State Health Insurance Assistance Program is South Dakota SHIINE (Senior Health Information and Insurance Education), at (800) 536-8197. It offers one-on-one Medicare counseling that is separate from any insurance company or agent, and it is worth knowing about whether or not you also talk to us.
A checklist for the weeks before December 7
- Find the Annual Notice of Change your plan mailed this fall and read the page about next year's costs.
- List every doctor, hospital and prescription you use, and check each against any South Dakota plan you are considering.
- Compare the monthly premium, the deductible, the copays and the yearly limit, not only the premium.
- If you take specialty drugs, check which tier each is on and whether the plan requires approval first.
- Start before the last week. Changes are easier to correct when there is time left.
If money is tight
South Dakota Department of Social Services (DSS) runs South Dakota's Medicaid program and the Medicare Savings Programs, which can help people with limited income pay some Medicare costs. Ask about them before you choose a plan, because they can change which plan makes sense.
More on Medicare in South Dakota
Medicare questions in South Dakota
When is Medicare open enrollment in South Dakota?
Medicare's Annual Enrollment Period is the same in every state: October 15 to December 7. A plan you choose in South Dakota during that time starts January 1.
Can I change my Medicare plan after December 7 if I live in South Dakota?
If you are in a Medicare Advantage plan, you get one change between January 1 and March 31. Outside those windows, most people can change only if something qualifies them for a special enrollment period, such as moving or a plan leaving their area.
Who can help me with Medicare for free in South Dakota?
South Dakota SHIINE (Senior Health Information and Insurance Education) gives one-on-one Medicare counseling at (800) 536-8197. You can also call us, and there is no charge for that either.
Does South Dakota have its own Medicare open enrollment?
No. Medicare is federal, so the dates are national. What differs by state is which plans are offered in your county, and the local programs that help with costs.
Talk through your Medicare options in South Dakota
Call 855-367-1095 and a licensed agent will review your plan, doctors and prescriptions with you before December 7.
- Licensed insurance help
- No guaranteed eligibility, pricing, or availability
- Educational starting point
GetFastRates.com is not connected with or endorsed by the U.S. government or the federal Medicare program. Calling connects you with licensed insurance help. Plan availability, costs, benefits, and enrollment rules can vary by state, carrier, and individual situation.