South Dakota’s Medicare Advantage market is small and changing fast, with fewer carriers and mostly PPO plans. That makes careful comparison more important than ever.
This guide covers the best Medicare Advantage plans in South Dakota, what they cost, what they cover, and how to choose and enroll for 2027.
1. 5 Best Medicare Advantage Plans in South Dakota
The best Medicare Advantage plans in South Dakota for 2027 depend on your county, healthcare providers, prescription needs, and budget. The five insurers below offer different options, including PPO plans and Special Needs Plans for eligible beneficiaries.
Wellmark Advantage Health Plan will end its Medicare Advantage coverage after December 31, 2026. Current members should review replacement coverage before their plan ends.
| Carrier | Plan Types | 2026 CMS Rating | Avg. Monthly Premium | Best For |
| Align (Sanford Health Plan) | PPO | 3.5 | ~$33 | Sanford Health patients |
| Aetna Medicare | PPO, D-SNP | 3.5 | ~$26 | Low premiums |
| UnitedHealthcare | PPO, D-SNP | Up to 4.5 (D-SNP) | ~$28 | Dual-eligible members |
| Great Plains Medicare Advantage | I-SNP | Varies | Varies | Nursing home residents |
| Medica | Medicare Cost plans | 3.5 | ~59–335 | Broad provider access |
Align powered by Sanford Health Plan
Align offers regional Medicare Advantage PPO plans, including Align SecureChoice and SecureChoice Gold, in select South Dakota counties.
Its connection with Sanford Health makes it worth considering for patients who regularly use Sanford facilities. However, confirm that your doctors and hospitals participate in the specific plan’s 2027 network.
Aetna Medicare
Aetna offers Medicare Advantage PPO plans and Dual Eligible Special Needs Plans (D-SNPs) in parts of South Dakota.
Its 2027 options include Aetna Medicare Signature and Enhanced Extra. Compare each plan’s premiums, out-of-pocket limits, prescription coverage, and provider network before enrolling.
UnitedHealthcare
UnitedHealthcare offers Medicare Advantage PPO and D-SNP options in South Dakota, making it a provider worth considering when comparing the best Medicare Advantage plans in South Dakota.
Its relatively broad geographic availability may appeal to eligible Medicare-Medicaid beneficiaries. However, available plans, prescription drug benefits, and provider networks vary by county.
Great Plains Medicare Advantage
Great Plains offers Institutional Special Needs Plans (I-SNPs) for people who live in qualifying care facilities or require an institutional level of care.
Unlike standard Medicare Advantage plans, these options have specific eligibility requirements. They are most relevant to eligible long-term care residents and people requiring similar levels of care.
Medica
Medica offers Medicare Advantage PPO plans in South Dakota for 2027, including Medica Advantage Essential, Preferred, and Select.
It also has Medicare Cost plan offerings, which are a different type of Medicare health plan. Compare available PPO options based on provider networks, prescription benefits, and total out-of-pocket costs.
Before choosing any plan, enter your ZIP code in Medicare Plan Finder to confirm available 2027 coverage.
2. How Much Do Medicare Advantage Plans Cost in South Dakota?
Even the best Medicare Advantage plans in South Dakota come with costs. Here’s what to budget for:
- Monthly premiums: Several carriers offer $0-premium plans, while others charge more. The average South Dakota Medicare Advantage premium rose to about $58 in 2026.
- Deductibles and copays: Expect copays for doctor visits and hospital stays, plus possible drug deductibles.
- Maximum out-of-pocket limits: In-network limits vary widely, from about $4,200 to $6,700 or more depending on the plan.
- Part B premium: You still pay your Part B premium, which is $202.90 per month in 2026.
A $0-premium plan isn’t always the cheapest overall. Some $0 plans have higher copays or a higher out-of-pocket limit. If you need frequent care, a plan with a modest premium and lower cost-sharing may cost less over the year.
>>> Read more: Medicare Plan F vs Plan G 2026: Costs & Key Differences
3. What Do South Dakota Medicare Advantage Plans Cover?
Medicare Advantage plans in South Dakota cover nearly all medically necessary services covered by Original Medicare, and many offer additional benefits. Coverage generally includes:
- Hospital and medical services: Inpatient hospital stays, doctor visits, outpatient care, and preventive services.
- Prescription drugs: Most plans include Medicare Part D, but some offer medical coverage without prescription benefits.
- Dental, vision, and hearing: Depending on the plan, benefits may include routine exams, glasses, dental care, or hearing aids.
- Additional benefits: Some plans offer fitness memberships, over-the-counter (OTC) allowances, or transportation to medical appointments.
Coverage restrictions vary. PPO plans generally allow out-of-network care at a higher cost, while certain services may require prior authorization. Supplemental benefits may also have annual limits.
Before enrolling, check whether your preferred providers, including Sanford Health, Avera Health, or Monument Health, participate in the plan’s 2027 network.
4. How to Choose the Best Medicare Advantage Plan in South Dakota
The best Medicare Advantage plans in South Dakota for you depend on five practical factors:
- County and ZIP code availability: Plan choices vary by county, and some rural counties have very few options.
- Doctors and hospitals: Make sure your doctors and preferred health system, such as Sanford, Avera, or Monument Health, are in network.
- Total annual costs: Add premiums, expected copays, and the out-of-pocket limit.
- Drug coverage: Confirm your prescriptions are covered and your pharmacy is in network.
- Star Ratings and extras: Compare CMS ratings and the extra benefits you’ll actually use.
CMS rates plans from 1 to 5 stars based on care quality, member experience, and customer service. A plan with 4 or more stars generally performs better on these measures.
5. How to Find and Enroll in Medicare Advantage Plans in South Dakota
To find the best Medicare Advantage plans in South Dakota, follow these steps:
- Visit Medicare Plan Finder to explore available coverage.
- Enter your ZIP code and select the 2027 coverage year to see plans available in your area.
- Compare your options, including premiums, out-of-pocket costs, prescription coverage, and provider networks.
- Confirm eligibility. You generally need Medicare Part A and Part B and must live in the plan’s service area.
- Enroll through Medicare.gov, the insurance carrier, or 1-800-MEDICARE.
For coverage beginning January 1, 2027, the Annual Enrollment Period runs from October 15 to December 7, 2026.
If your current plan is ending, such as Wellmark Advantage Health Plan, you may qualify for a Special Enrollment Period. Check your termination notice for applicable deadlines.
>>> Read more: AARP Medicare Advantage Plans: How They Work, What They Cover & 2027 Changes
6. FAQs
What is the highest-rated Medicare Advantage plan in South Dakota?
Among the best Medicare Advantage plans in South Dakota, UnitedHealthcare’s Dual Complete SD-Q1 D-SNP earned the highest local rating in 2026, at 4.5 stars. Most standard PPOs in the state are rated 3.5 stars.
Are there $0-premium Medicare Advantage plans in South Dakota?
Yes. Aetna, Align, and UnitedHealthcare offer $0-premium plans in some counties, though you still pay your Part B premium.
Can I change my Medicare Advantage plan every year?
Yes. You can switch during the Annual Enrollment Period, from October 15 to December 7. If you’re already in a Medicare Advantage plan, you can also make one change between January 1 and March 31.
Is Medicare Advantage better than Original Medicare in South Dakota?
It depends on your needs. The best Medicare Advantage plans in South Dakota often have lower premiums and extra benefits. Original Medicare with a Medigap plan offers wider provider access, which can matter in rural areas.
7. Final Thoughts
The best Medicare Advantage plans in South Dakota for 2027 come from a short list: Align, Aetna, UnitedHealthcare, and Sanford’s Great Plains I-SNP, with Medica’s Cost plans as an alternative. Compare plans by ZIP code, check your doctors and drugs, and enroll by December 7.
