Medicare in South Dakota: Plans and Coverage (2026)

Medicare in South Dakota runs on federal rules, but the state adds free counseling through SHIINE and its own Medicaid process for the Medicare Savings Programs. This guide covers every part of Medicare for South Dakota residents in 2026: what it costs, what plans exist, and how to get help paying.1,2

In This Guide

• Key Takeaways
• Original Medicare: Parts A and B
• Medicare Advantage in South Dakota (Part C)
• Medicare Part D: Prescription Drugs
• Medigap in South Dakota
• Help Paying for Medicare in South Dakota
• Medicare Enrollment Periods
• Free Medicare Help: South Dakota SHIINE
• Frequently Asked Questions

About these numbers: The premiums and deductibles below come from CMS for calendar year 2026, effective January 1.3 Medicare costs change every year, and the figures in effect for the year you're reading in are always posted at medicare.gov. To reach a person, call Medicare at 1-800-633-4227 (1-800-MEDICARE), open 24 hours a day, 7 days a week; TTY users call 1-877-486-2048.5 South Dakota SHIP counselors will also walk through your costs with you, free, through consumer.sd.gov.1

Original Medicare: Parts A and B

Original Medicare is run directly by the federal government and has two parts. The mechanics and costs are identical in South Dakota and every other state.

Part A (Hospital Insurance)

Part A covers inpatient hospital stays, limited skilled nursing facility care, hospice, and some home health care.3

The hospital deductible rose $60 from 2025, to $1,736 per benefit period.3 A benefit period starts the day you're admitted and ends once you have gone 60 days in a row without inpatient hospital care or skilled care in a skilled nursing facility. Get readmitted after that and the deductible applies again.

Part B (Medical Insurance)

Part B covers doctor visits, outpatient care, preventive services, durable medical equipment, and mental health care. It doesn't cover routine dental, vision, or hearing.3,6

• Monthly premium: $202.90 (higher if your 2024 income was above $109,000 single or $218,000 married, under the income-related adjustment)3
• Annual deductible: $2833
• After the deductible: you pay 20% of the Medicare-approved amount for most services3

Part B is technically optional, but nearly everyone signs up. Delay past your enrollment window without qualifying for a Special Enrollment Period or a Medicare Savings Program and you'll owe a late penalty of 10% for every 12 months you could have had it, for as long as you keep Part B.7

Medicare Advantage in South Dakota (Part C)

Medicare Advantage plans are an alternative to Original Medicare, sold by private insurers. They cover everything Parts A and B do, except hospice, which Original Medicare keeps covering. Most bundle in Part D drug coverage along with extras like dental, vision, and hearing.8

South Dakota residents in the Sioux Falls and Rapid City areas generally see the widest plan selection. Rural counties across the state tend to have fewer choices, and some areas may have very limited Medicare Advantage availability. Plan options, networks, and prices change every year and differ by county, so compare what's available at your address before you decide.

How These Plans Work

• You keep paying your Part B premium ($202.90) on top of any plan premium. The CMS estimate for the average Medicare Advantage premium in 2026 is about $14 a month, and many plans charge $0 extra. Some plans go further and help pay all or part of your Part B premium.3,8
• Plans run on networks (HMO or PPO). Confirm your doctors and hospitals are in-network before you enroll. Emergency care, out-of-area urgent care, and temporary out-of-area dialysis are covered whether you get them in the plan's network or outside it.8
• Plans usually require prior authorization for certain services, which Original Medicare generally does not.8
• Every plan caps your annual in-network out-of-pocket spending (federally limited to $9,250 in 2026; many plans set it lower). Original Medicare has no such cap on its own. CMS's sentence adds the condition: no yearly limit on what you pay out of pocket unless you have supplemental coverage, like Medigap, Medicaid, employer, retiree, or union coverage. What each covers varies by policy.8

Use the Medicare Plan Finder at medicare.gov to compare plans by ZIP code. Enter your doctors and prescriptions and it shows which plans cover them and your estimated cost. A South Dakota SHIP counselor can help you work through the results for free.

Medicare Part D: Prescription Drugs

Part D covers outpatient prescription drugs. You can get it as a standalone plan paired with Original Medicare, or built into a Medicare Advantage plan.

The Inflation Reduction Act eliminated the old coverage gap, so that higher-cost middle stage is gone.4 Part D now moves through three phases:

1. Deductible: you pay full price until you meet your plan's deductible (up to $615 in 2026).9
2. Initial coverage: you pay copays or coinsurance while your plan and drug makers cover the rest.
3. Catastrophic: once your out-of-pocket spending reaches $2,100, you pay $0 for covered drugs the rest of the year.4

That $2,100 cap is the number that matters most in Part D. It was $2,000 in 2025 and rises with drug-spending growth. The average standalone Part D premium for 2026 is about $34.50 a month, though actual plan premiums vary widely.3 Every plan also has to offer the Medicare Prescription Payment Plan, which lets you spread your out-of-pocket drug costs into capped monthly payments across the year instead of paying in full at the pharmacy.4 People who qualify for Extra Help often pay much less, sometimes nothing.

For a deeper look at how the redesigned Part D benefit works, see our guide to Medicare Part D drug coverage.

Medigap in South Dakota

Medigap, also called Medicare Supplement Insurance, is extra insurance you buy from a private health insurance company to help pay your share of out-of-pocket costs in Original Medicare. You can't use a Medigap policy to pay a Medicare Advantage plan's copayments, coinsurance, deductibles, or premiums.10

Medigap plans are standardized by letter. Medicare's 2026 guide Choosing a Medigap Policy charts them as Plans A, B, C, D, F, G, K, L, M, and N, and every insurance company that sells Medigap policies must offer at least Plan A.11 Plans C and F are no longer available to people new to Medicare, meaning anyone who turned 65 on or after January 1, 2020 and got Part A on or after January 1, 2020; those buyers have the right to buy Plans D and G instead, which give the same benefits but don't cover the Part B deductible.11 Plan G covers the same benefits as Plan F except the annual Part B deductible: it pays the Part A deductible, Part A coinsurance and hospital costs, skilled nursing facility coinsurance, and Part B excess charges.11

Your strongest opening is the six-month Medigap Open Enrollment Period that begins with the first month you are 65 or older and enrolled in Part B. South Dakota law (SDCL 58-17A-17) protects an application submitted before or during that window: no insurer may deny, condition, or price a policy because of your health status, claims experience, receipt of health care, or medical condition, and each policy an insurer currently offers must be made available to you.11 Outside that window, an insurance company is allowed to deny you a policy if you don't meet its medical underwriting requirements, and you may have additional rights under state law.12

South Dakota's Medicare Supplement rules also cover people under 65 who have Medicare because of a disability. Under ARSD 20:06:13:84, any individual, regardless of age, who becomes eligible for Medicare by reason of age or disability is entitled to open enrollment into any Medigap policy if they apply within six months of enrolling in Part B; the rule applies only to people who became eligible for Medicare on or after July 1, 1999.11 An insurer may rate people who qualify by disability as a separate class, but only at an actuarially justified rate that does not exceed what it charges someone who qualifies for Medicare by age and is 75 years old.11 Already having Part B doesn't use up your age-65 window: you still get a Medigap Open Enrollment Period when you turn 65.11

After certain coverage losses, South Dakota's guaranteed issue rules (ARSD 20:06:13:79 through 20:06:13:80.01) apply. They include situations such as employer coverage ending or a Medicare Advantage plan no longer serving your area, and for an eligible person an insurer may not deny certain Medigap policies, price them based on health status, or impose a pre-existing condition exclusion.11 The guaranteed issue windows generally close 63 days after a date the rule sets, such as the date the coverage ends, and you must send evidence of the termination or disenrollment date with your application.11

Medigap or Medicare Advantage?

You can't run both at once: you can't use a Medigap policy to pay your Medicare Advantage copayments, coinsurance, deductibles, or premiums, and while you're in an Advantage plan it's illegal for anyone to sell you a Medigap policy unless you're switching back to Original Medicare.10 The choice isn't always permanent. If you join a Medicare Advantage plan for the first time and aren't happy with it, federal law gives you a trial right to buy a Medigap policy and a separate Medicare drug plan if you return to Original Medicare within 12 months of joining.10 South Dakota's guaranteed issue rules also cover someone who dropped a Medigap policy to enroll for the first time in a Medicare Advantage plan and ends that enrollment within the first 12 months.11 Otherwise, CMS warns that in most cases, if you drop your Medigap policy to join a Medicare Advantage plan, you may not be able to get the same policy back.10 For a side-by-side look at the trade-off, see our guide to Original Medicare vs. Medicare Advantage.

Help Paying for Medicare in South Dakota

If you're on a fixed income, two programs can cut your Medicare costs sharply.

Medicare Savings Programs

South Dakota administers its Medicare Savings Programs through SD DSS Medicaid. The income limits below are the federal 2026 standards from the POMS row covering all states except Alaska and Hawaii, and DSS uses its own QI-1 label for the highest tier. DSS publishes that top threshold ($1,816 for an individual, $2,455 for a couple) and the resource limits itself; it does not publish a QMB or SLMB income figure of its own, so those two tiers are the federal standards rather than numbers the state states.2

QMB is the most generous, covering your Part B premium plus your deductibles and coinsurance, and federal law bars providers from billing a QMB enrollee for that cost-sharing. QI has to be applied for again every year, because being selected one year does not carry you into the next.2 For all three programs the 2026 resource limit is $9,950 for one person and $14,910 for a couple, and DSS publishes those same figures. That limit is not a cap on everything you own. DSS counts checking and savings accounts and certificates of deposit, and its brochure states that in figuring your savings you do not include your home, one car per couple used for transportation, burial plots, up to $1,500 for burial expenses, or a limited amount in an irrevocable burial trust.2 Each income figure above is that tier's Federal Poverty Level percentage plus the $20 monthly SSI general income exclusion, not the bare poverty-level amount, and DSS says the income and savings limits may change slightly each year.2 None of these numbers is an absolute cutoff: states can effectively raise both the income and the resource limits by disregarding certain income and resources, so someone somewhat over should still apply. You apply through SD DSS online or at a local DSS office on 877.999.5612, and SHIINE volunteers fill out the Medicare Savings Program application with you free of charge.2 Enrolling in QMB, SLMB, or QI-1 automatically qualifies you for Extra Help with Part D; QDWI, the fourth savings program, does not.2

Extra Help for Part D

Extra Help, also called the Low-Income Subsidy, pays Part D premiums, deductibles, and copays for people with limited income and resources.13 Since 2024 the partial-subsidy tier is gone, so everyone who qualifies now gets the full subsidy.

• Income limit (2026): up to about $1,995 a month for an individual, $2,705 for a couple, in the 48 contiguous states and DC (Alaska and Hawaii are higher)13
• Resource limits: $16,590 for an individual, $33,100 for a married couple, rising to $18,090 and $36,100 if you tell Social Security you expect to use some of your resources for burial expenses13
• If you qualify for QMB, SLMB, or QI-1, you're enrolled in Extra Help automatically2

Apply through Social Security at ssa.gov/benefits/medicare/prescriptionhelp.html or call 1-800-772-1213 (TTY 1-800-325-0778). Extra Help isn't available in Puerto Rico, the U.S. Virgin Islands, Guam, the Northern Mariana Islands, or American Samoa, where residents should call their State Medical Assistance (Medicaid) office about the other programs offered there instead.13,14

Medicare Enrollment Periods

Miss a deadline and you can face coverage gaps or permanent penalties. These dates are federal and the same in South Dakota as everywhere else.15

Changes you make during Annual Open Enrollment take effect the following January 1. If you're already getting Social Security before 65, you're enrolled in Parts A and B automatically; if not, you sign up yourself through Social Security.15 If you're still working past 65 with group health coverage based on that current employment, you can delay Part B without penalty and use an eight-month Special Enrollment Period to sign up, counted from the month that job or coverage ends, whichever comes first; miss that window and you wait for the General Enrollment Period (January 1 to March 31) and may owe a late penalty. COBRA and retiree coverage do not count as coverage based on current employment, and if you're self-employed or your plan isn't available to everyone at the company, ask your insurer whether it qualifies before you delay; if it doesn't, sign up at 65. This Special Enrollment Period does not apply if you're eligible for Medicare based on End-Stage Renal Disease (ESRD).16

Free Medicare Help: South Dakota SHIINE

You don't have to figure this out alone, and you don't have to pay a broker. South Dakota's State Health Insurance Assistance Program is called SHIINE, Senior Health Information and Insurance Education. It is federally funded and gives free, unbiased, confidential information about Medicare through trained staff and volunteers, and every Medicare beneficiary in South Dakota is eligible to use it. Counselors don't sell insurance.1

A SHIINE counselor can help you:

• Understand your Medicare options and what each part covers
• Compare Medicare Advantage, Part D, and Medigap plans side by side
• Apply for Medicare Savings Programs and Extra Help
• Sort out claims, denials, and appeals

Call SHIINE's centralized call center at 1-888-854-5321 to be connected with a trained volunteer, or find your regional office at dhs.sd.gov.1

Key South Dakota Medicare Contacts

Learn More

Find personalized help with Medicare in South Dakota at brevy.com.

The information on Brevy.com is for educational purposes only and is not a substitute for professional legal, financial, or medical advice. Rules vary by state and program and change frequently. Always verify with the relevant agency or a qualified professional. Brevy is not a law firm, financial advisor, or healthcare provider.