Medicare Supplement Plan G in South Dakota: 2026 Rates and Guide
This guide covers Medicare Supplement Plan G in South Dakota: average 2026 premiums by age, South Dakota's rating rules, top insurers, and how to enroll with the best protection available in your state.
Plan G Coverage Overview
Medicare Supplement Plan G is the most comprehensive Medigap plan available to new Medicare beneficiaries. It covers all Original Medicare cost-sharing except the annual Part B deductible ($283 in 2026). After you pay that deductible once per year, Plan G pays 100% of all Medicare-approved costs for the remainder of the year.
Plan G benefits are federally standardized; every insurer selling Plan G in South Dakota must provide identical coverage. The only variable between insurers is the monthly premium and their premium increase history over time.
What Plan G Covers
- Part A coinsurance & hospital costs (up to 365 days after Medicare): ✓ Fully covered
- Part A deductible ($1,736 in 2026): ✓ Fully covered
- Part A hospice care coinsurance or copayment: ✓ Fully covered
- Part B coinsurance or copayment (20% of outpatient costs): ✓ Fully covered
- Part B deductible ($283 in 2026): ✗ Not covered (you pay this cost) (The only cost you pay: $283 in 2026)
- Part B excess charges (above Medicare-approved amount): ✓ Fully covered
- Skilled nursing facility care coinsurance: ✓ Fully covered
- Foreign travel emergency coverage (up to plan limits): ✓ Fully covered (Up to plan limits after $250 deductible; 80% covered up to $50,000 lifetime)
Source: CMS standardized Medigap benefit chart. CMS Publication 02110.
Plan G Premiums in South Dakota (2026)
Premiums for Plan G in South Dakota vary by insurer, age, gender, and tobacco use. The estimates below are for a non-smoking female. Men typically pay 5–10% more. Tobacco users may pay significantly more. These are representative starting ranges; always get current quotes directly from insurers or through Medicare.gov.
| Age | Estimated Monthly Premium | Annual Estimate |
|---|---|---|
| Age 65 (new enrollee) | ~$110/mo | ~$1320/yr |
| Age 70 | ~$138/mo | ~$1650/yr |
| Age 75 | ~$171/mo | ~$2046/yr |
| Age 80 | ~$209/mo | ~$2508/yr |
* Age 70–80 estimates use typical attained-age premium progression factors. Verify current rates at Medicare.gov.
How South Dakota Rates Medigap Premiums: Attained-Age Rating
Like most states, South Dakota allows insurers to use attained-age rating for Medigap premiums. This means your premium is based on your current age and will increase automatically each year as you get older, in addition to any general rate increases.
In attained-age states, the premium you pay at age 65 may look very affordable, but premiums typically double or triple by your 80s. When comparing quotes, always ask the insurer for projected premium schedules at ages 70, 75, and 80, not just your age-65 rate.
Strategy tip: In attained-age states like South Dakota, consider whether the insurer has a history of stable rate increases. Some insurers have better track records than others. A free SHIP counselor can help you compare insurer histories.
South Dakota Plan G Costs in Context
At an estimated $110/month for a 65-year-old, Plan G in South Dakota ranks #1 of 51 among states and DC from lowest to highest cost, sitting 19% below the national median of $135/month in our dataset. South Dakota is home to about 205,000 Medicare beneficiaries (#46 by enrollment), so the number of active insurers can be more limited than in the largest states.
South Dakota uses attained-age rating, so the $1,320 a year implied by today's Plan G premium is a starting point that typically rises as you age. Ask each insurer for its rate-increase history before you commit.
Plan G vs Plan N break-even in South Dakota
Plan N costs about $22 less per month than Plan G here, or roughly $264 a year. Because Plan N can charge up to $20 per office visit and up to $50 per emergency room visit that does not lead to admission, that saving is used up after about 13 office visits or 5 ER visits in a year (the copays are maximums, so real-world break-even is often a little higher). Plan N also does not cover Part B excess charges.
| Care use in a year | Plan G total | Plan N total (max copays) | Lower cost |
|---|---|---|---|
| Light use: 2 office visits, no ER | $1,603 | $1,379 | Plan N |
| Typical use: 6 office visits, no ER | $1,603 | $1,459 | Plan N |
| Regular use: 12 office visits, 1 ER visit | $1,603 | $1,629 | Plan G |
| Heavy use: 20 office visits, 2 ER visits | $1,603 | $1,839 | Plan G |
Totals add twelve months of the estimated age-65 premium to the $283 Part B deductible (2026) that both plans leave to you, plus Plan N copays at their maximum. They exclude Part B premiums and Part D. Actual quotes vary by insurer, age, gender, and tobacco use.
How South Dakota compares with nearby states
Other Midwest states with similar Plan G pricing, for comparison:
| State | Plan G (age 65) | Plan N (age 65) | Rating method |
|---|---|---|---|
| South Dakota | ~$110/mo | ~$88/mo | attained age |
| North Dakota | ~$110/mo | ~$88/mo | attained age |
| Kansas | ~$112/mo | ~$90/mo | attained age |
| Nebraska | ~$113/mo | ~$90/mo | attained age |
| Iowa | ~$114/mo | ~$91/mo | attained age |
Top Plan G Insurers in South Dakota
The following insurance companies are among the leading sellers of Medicare Supplement Plan G in South Dakota: Wellmark BCBS South Dakota, Sanford Health, Avera Health Plans.
Because Plan G benefits are standardized, there's no meaningful difference in what these companies cover. Your decision should be based on:
- Current premium: get quotes from all of them
- Premium increase history: ask for data from the past 3–5 years
- Financial strength rating: look for A.M. Best ratings of A- or better
- Customer service reviews: complaints per 1,000 policyholders (available from NAIC)
How to Enroll in Plan G in South Dakota
- Confirm you're eligible: You must be enrolled in Medicare Parts A and B. Most people first become eligible at age 65.
- Enroll during your Open Enrollment Period: Your 6-month Medigap OEP starts the month you're both age 65 and enrolled in Part B. During this window, insurers in South Dakota cannot deny you Plan G or charge more based on health conditions.
- Compare quotes: Use Medicare.gov's Plan Finder or contact a licensed insurance broker who works with multiple companies in South Dakota.
- Review premium increase history: Ask each insurer how much they've raised Plan G rates in South Dakota over the past 3–5 years before enrolling.
- Pair with a Part D drug plan: Plan G does not cover prescription drugs. You'll need a separate Medicare Part D plan.
South Dakota Division of Insurance
The South Dakota Division of Insurance regulates insurance companies operating in South Dakota, handles consumer complaints, and can provide a list of licensed insurers selling Plan G in your area.
- Website: https://dlr.sd.gov/insurance/
- Phone: 1-605-773-3563
If you have a complaint about a Medigap insurer operating in South Dakota, the South Dakota Division of Insurance is your primary resource for resolution.
Plan G vs Plan N in South Dakota
If you're comparing Plan G and Plan N in South Dakota, here are the key numbers:
| Plan | Avg. Premium (Age 65) | Doctor Visit Copay | ER Copay | Excess Charges |
|---|---|---|---|---|
| Plan G | ~$110/mo | $0 | $0 | ✓ Covered |
| Plan N | ~$88/mo | Up to $20 | Up to $50 | ✗ Not covered |
The premium difference in South Dakota is approximately $22/month at age 65. If you rarely visit the doctor and primarily see Medicare-assignment providers, Plan N may be the better value. If you have frequent medical visits or want complete cost predictability, Plan G is worth the extra premium.
Full Plan G vs Plan N comparison →
Frequently Asked Questions
How much does Medicare Supplement Plan G cost in South Dakota?
Average Plan G premiums in South Dakota for a 65-year-old non-smoking female range from approximately $88 to $168 per month in 2026, with a typical starting rate around $110/month. Premiums vary by insurer, your exact age, gender, and tobacco use. Always get multiple quotes before enrolling.
What is attained-age rating in South Dakota?
Attained-age rating means your premium is based on your current age and will increase as you get older. In South Dakota, this is the most common rating method. Starting premiums at age 65 may be lower, but expect increases each year as you age.
What are my Plan G enrollment rights in South Dakota?
In South Dakota, Standard federal protections apply. The most important enrollment window is your 6-month Medigap Open Enrollment Period, which begins the month you are both age 65 and enrolled in Medicare Part B. During this window, insurers cannot deny you coverage or charge more due to pre-existing conditions.
Who are the top Plan G insurers in South Dakota?
Major insurers offering Plan G in South Dakota include Wellmark BCBS South Dakota, Sanford Health, Avera Health Plans. Because Plan G benefits are federally standardized, the main differences between insurers are the monthly premium and their premium increase history. Always compare quotes from at least 3–4 companies.
Does South Dakota have any special Medigap protections?
South Dakota follows federal standard protections. Standard federal protections apply. Some states provide additional protections; contact the South Dakota Division of Insurance to confirm current rules.
This site provides general information about Medicare Supplement insurance and medical alert devices. It is not affiliated with or endorsed by the Centers for Medicare & Medicaid Services (CMS) or any government agency. This is not medical or insurance advice. Always consult a licensed insurance professional for personalized guidance.
Medicare rules, premiums, and plan availability change annually. Always verify current information with Medicare.gov, your State Insurance Department, or a licensed insurance advisor. For free, unbiased help, contact your State Health Insurance Assistance Program (SHIP) at shiphelp.org.
Sources
- Centers for Medicare & Medicaid Services. Medicare Supplement Insurance (Medigap). medicare.gov. Retrieved September 2026.
- CMS. Choosing a Medigap Policy: A Guide to Health Insurance for People with Medicare. Publication 02110. cms.gov. Retrieved September 2026.
- South Dakota Division of Insurance. https://dlr.sd.gov/insurance/. Retrieved September 2026.