Best Health Insurance in South Dakota (2026)

Sanford Health Plan and Wellmark offer the best health insurance in South Dakota for the 2026 plan year.

Compare top health insurance plans in South Dakota below.

Updated: July 9, 2026

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Key Takeaways

Sanford Health Plan has the best HMO and PPO plans in South Dakota for 2026, with Silver-tier HMO rates averaging $547 per month for a 40-year-old.

Wellmark has the best EPO plans in South Dakota, with $740 average monthly premiums for Silver-tier plans. Its Gold plan at $720 costs less than Silver and carries a deductible less than half as large.

Confirm your preferred doctors are in the plan network before enrolling. Then compare deductibles across both carriers. At Sanford, switching from Silver to Gold HMO saves $1,342 on the deductible for $27 more per month.

South Dakota's ACA marketplace has three carriers for 2026: Avera Health Plans, Sanford Health Plan and Wellmark. Avera's coverage is concentrated in eastern South Dakota, so for most of the state the practical comparison is between Sanford and Wellmark.

Rural geography affects network access. Sanford's HMO coverage follows its system's footprint, so coverage quality depends on where in the state you live. Our review of every 2026 plan found a $193 a month difference between the cheapest Silver-tier HMO and the cheapest Silver-tier EPO, or $2,316 a year.

At Wellmark, Gold costs less than Silver: $720 a month against $740 a month, with a $1,406 deductible against $3,007.

Best Health Insurance Companies in South Dakota

Sanford Health Plan is the best health insurance provider in South Dakota for HMO and PPO policies, with the most affordable rates in the state for these plan types.

Wellmark features lower maximum out-of-pocket (MOOP) limits and is best suited for shoppers who prefer EPO plans and more predictable cost sharing.


Sanford Health Plan	$547	$5,881	$2,748	4.5	HMO, PPO
Wellmark Of South Dakota, Inc.	$740	$5,325	$3,007	5	EPO

*Our picks reflect the best companies for 40-year-olds seeking Silver-tier plans. Rates vary by age and coverage level.

MONEYGEEK EXPERT TIP

South Dakota expanded Medicaid in July 2023, later than most states. That expansion moved a portion of low-income residents from ACA coverage into Medicaid. 2026 rates reflect a more stable post-expansion enrollment baseline.

Sanford Health Plan

MoneyGeek Rating

4.5/ 5

4.2/5Affordability

5/5Deductible

5/5MOOP

Average Monthly Rate
$547
Average MOOP
$5,881
Average Deductible
$2,748

pros
- HMO and PPO plans across all metal tiers
- Gold HMO features low $1,406 deductible
cons
- PPO plans cost $175 to $230 more monthly than HMO equivalents
- High deductibles on Catastrophic plans at $10,600
Sanford Health Plan offers HMO and PPO plans across all metal levels from Catastrophic to Gold. HMO plans are the stronger choice at every tier.

Gold HMO averages $574 per month against Silver HMO's $547, a $27 difference that reduces the deductible from $2,748 to $1,406. If you are someone who expect to use their coverage, we'd suggest that trade is worth taking.

PPO options add out-of-network access but cost $175 to $230 more per month than HMO equivalents. Silver PPO reaches $753 with the same $2,748 deductible as Silver HMO. Catastrophic PPO starts at $411.
The $206 monthly premium gap between Sanford's HMO and PPO is the most avoidable cost in South Dakota's 2026 market. Both plans reach on the same Sanford network. The PPO's out-of-network access adds little value in a state where Sanford covers the majority of providers.

Avoid the Sanford PPO entirely as its Silver HMO at $547 per month gives you the same network at a fraction of the cost. And if you see specialists regularly and want to book appointments without a referral, choose Wellmark instead. Wellmark's EPO at $740 per month costs $13 less than Sanford's Silver PPO and removes the referral requirement.
Sanford Health Plan South Dakota health insurance plans for 2026:
Data filtered by:
Plan Type
HMO
Metal Level
Catastrophic
Sanford Individual True $10,600 $294 HMO Catastrophic $10,600 $10,600 Yes


Sanford Individual True $10,600	$294	HMO	Catastrophic	$10,600	$10,600	Yes

Wellmark of South Dakota

MoneyGeek Rating

5/ 5

5/5Affordability

5/5Deductible

5/5MOOP

Average Monthly Rate
$740
Average MOOP
$5,325
Average Deductible
$3,007

pros
- EPO network lets you see specialists without a referral, with in-network primary care required
- Gold plan has a $1,406 deductible at $720 a month
- Expanded Bronze is HSA-eligible at $537 a month
cons
- In-network primary care required for all EPO plans
- Silver costs more than Gold ($740 a month) with a higher deductible
Wellmark sells EPO plans only in South Dakota. EPO plans let you see specialists without a referral but require in-network primary care. Monthly rates go from $537 a month for Expanded Bronze to $740 a month for Silver, with Gold at $720 a month. Gold costs $20 less a month than Silver and has a deductible of $1,406 versus Silver's $3,007.

For enrollees who don't qualify for Silver cost-sharing reductions, Gold is the better option. The Expanded Bronze plan at $537 a month is HSA-eligible, making it a good fit for buyers who want tax-advantaged savings at the lowest monthly rate.
Wellmark's Silver plan is the wrong choice for most buyers in South Dakota. Silver costs $740 per month with a $3,007 deductible. Gold costs $720 with a $1,406 deductible. Paying more per month for a deductible more than twice as large is rarely the right trade.

But there's an exception to this when your income is between 100% and 250% of the federal poverty level and you qualify for cost-sharing reductions available on Silver plans alone through HealthCare.gov.

Incase cost-sharing reductions don't apply, buy Gold. And if keeping the monthly premium as low as possible is the priority, Sanford's Silver HMO at $547 is $173 less per month than Wellmark's Gold.

Wellmark South Dakota health insurance plans for 2026:

Data filtered by:


Wellmark Bronze Traditional Epo	$520	EPO	Expanded Bronze	$7,425	$5,400	Yes
Wellmark Bronze Hdhp Epo Hsa Qualified	$531	EPO	Expanded Bronze	$6,225	$6,225	Yes
Wellmark Standard Bronze Epo	$558	EPO	Expanded Bronze	$7,500	$5,625	Yes

Which Is the Best Health Insurance in South Dakota by Age and Plan Type?

Plan value in South Dakota varies by age and network type.

By Age:

Teens (18): Sanford Health Plan HMO ($391), Wellmark EPO ($529)
Young adults (26): Sanford Health Plan HMO ($438), Wellmark EPO ($593)
Adults (40): Sanford Health Plan HMO ($547), Wellmark EPO ($740)
Seniors (60): Sanford Health Plan HMO ($1,162), Wellmark EPO ($1,571)

Sanford Health Plan's HMO is our top pick on affordability at every age. An 18-year-old pays $391 a month for Sanford's HMO versus $529 a month for Wellmark's EPO. By age 60, that difference reaches $409 a month, or $4,908 a year.

Adults approaching 65 should move to Medicare rather than renewing an ACA plan, where age-rated premiums peak sharply. Buyers in their 50s should model 2027 and 2028 premiums before committing to either carrier. South Dakota's ACA plans are age-rated, so each renewal year raises the base cost. By age 60, Sanford's Silver HMO reaches $1,162 a month, which is more than double the $547 rate at 40.

By Network Type (40-year-olds):

HMO: Sanford Health Plan offers the best HMO policies at $547 per month
PPO: Sanford Health Plan provides coverage at $753 monthly
EPO: Wellmark offers Silver-tier EPO plans at $740 monthly

In my analysis, the $206 monthly gap is the most instructive number in this table. Sanford's PPO costs more for access to the same network its HMO already covers.

So I'd suggest that Sanford's Silver HMO at $547 is the right call for most South Dakota residents. The only profile that benefits from the Sanford PPO is a buyer with regular specialist care outside the Sanford system. For that profile, Wellmark's EPO at $740 offers the same no-referral structure at $13 less per month.

Compare Health Insurance Companies in South Dakota

Health insurance costs in South Dakota change based on your age, metal tier and provider choice.

Data filtered by:


Avera Health Plans	$545	HMO	Silver	$5,998	$3,021	40	No
Sanford Health Plan	$547	HMO	Silver	$5,881	$2,748	40	No

*Some providers offer multiple plans of the same type and tier. Rates are based on company averages across all available plans for the given age, plan type and metal tier.

Sanford and Avera are $2 apart at the Silver HMO tier for a 40-year-old. The choice between them is geographic, not financial. Avera operates in eastern counties only. Sanford covers more of the state. For buyers where both are available, Sanford's broader network makes it the stronger default.

How to Find the Best Health Insurance in South Dakota

South Dakota's three carriers have different strengths across plan types, metal tiers and counties. The four steps below cut to the decision that matters most for your situation.

Decide on your coverage needs before buying
Compare monthly premiums against out-of-pocket limits based on how often you use health care. Higher-premium plans usually cost less overall if you use care often.

Buyers who see a doctor once or twice a year usually spend less on a lower-premium plan, where the monthly savings outweigh the higher deductible.
Sanford Gold HMO costs $27 more per month than Silver, or $324 more per year. The deductible is $1,342 lower. If your annual care costs toward the deductible exceed $324, Gold costs less overall. A single specialist visit or one urgent care trip crosses that threshold for most enrollees.
Compare company offerings and reputations
South Dakota has three marketplace carriers for 2026: Avera Health Plans, Sanford Health Plan and Wellmark. Avera operates in eastern counties only. That narrow field makes comparison faster than most states, but plan structure varies enough to shift your annual cost by more than $2,300.

Check Sanford's provider directory for your county before enrolling. Its HMO network is strongest in eastern South Dakota and the Sioux Falls area. Wellmark's EPO network may cover providers outside the Sanford footprint, which matters for buyers in rural or western counties.
Shop around
Open enrollment for 2026 coverage ran from November 1, 2025, through January 15, 2026. Outside that window, enrollment requires a qualifying life event: job loss, marriage, divorce or a new dependent.

The monthly gap between Sanford's Silver HMO and Wellmark's Silver EPO is $193. Choosing the cheaper plan saves $2,316 per year.
Take advantage of federal programs and subsidies
South Dakota expanded Medicaid in July 2023, covering adults with household income at or below 138% of the federal poverty level. For a single adult in 2026, that's $22,025 annually. Check eligibility at HealthCare.gov before buying a marketplace plan.

Marketplace buyers with income between 100% and 400% of the federal poverty level may qualify for advance premium tax credits that lower monthly costs. Income-eligible enrollees on Silver plans at either Sanford or Wellmark may also qualify for cost-sharing reductions that lower the deductible.

Adults 65 and older qualify for Medicare. Compare Medicare Supplement and Medicare Advantage plans separately from the ACA options. Check HealthCare.gov to see your current subsidy estimate before comparing 2026 plan prices.

How Much Does Health Insurance Cost in South Dakota?

HMO plans are the most affordable health insurance plans in South Dakota, with Silver coverage averaging $546 a month. EPO Silver plans average $740 a month. PPO Silver plans average $765 a month, the highest in the state.


HMO	$546	$597
EPO	$740	$720
PPO	$765	$805

*Average monthly premiums for 40-year-olds in South Dakota by plan type. Rates vary by age and location.

Wellmark's Gold EPO at $720 is $20 less per month than Silver at $740. HMO Gold at $597 is above HMO Silver's $546, as expected. For EPO buyers, Gold is the right tier unless cost-sharing reduction eligibility makes Silver the better deal.

Best South Dakota Health Insurance: FAQ

South Dakota does not require residents to have health insurance at the state level. Residents don't pay penalties for being uninsured. People may still qualify for federal subsidies through the health insurance marketplace to make coverage more affordable.

South Dakota's open enrollment period for 2026 health coverage begins November 1, 2025, and ends January 15, 2026. You must select your plan by December 31, 2025, to have coverage start January 1, 2026.

Yes, South Dakota residents can access free health insurance through Medicaid if they meet income requirements. Residents above the Medicaid income threshold may qualify for premium subsidies through the federal marketplace that reduce or eliminate monthly costs.

Sanford Health Plan offers South Dakota's cheapest Silver-tier coverage at $547 per month for a 40-year-old on an HMO plan. Sanford's Gold HMO drops the deductible to $1,406 for $574 per month. Avera Health Plans appears at $545 in some counties but serves a more limited geographic footprint. Verify availability at HealthCare.gov.

How We Chose the Best Health Insurance in South Dakota

We weighted three cost factors: monthly premiums, maximum out-of-pocket limits and deductibles.

Monthly premium (60%): Plans with the lowest average monthly costs score highest.
Maximum out-of-pocket (20%): The annual cap on health care costs beyond premiums. Lower average MOOP limits score better.
Deductible (20%): The amount you pay before coverage begins. Lower average deductibles score higher.

Scores are standardized within each filter group. For Silver-tier HMO options, the top-performing plan earns a 5 out of 5, with all other plans scored relative to it.

MoneyGeek examined every 2026 health plan offered in South Dakota for people ages 18, 26, 40, 50 and 60. Premium costs shown reflect 40-year-old rates unless stated otherwise. Our analysis covers Catastrophic, Bronze, Expanded Bronze, Silver, Gold and Platinum coverage levels.

About Mark Fitzpatrick

Mark Fitzpatrick, a licensed Property and Casualty (P&C) Insurance Producer in Connecticut, is MoneyGeek's resident insurance expert. He has spent nearly a decade analyzing the market, first at LendingTree and now at MoneyGeek, where he produces original research on hundreds of carriers and millions of rates across auto, home, renters, health and life insurance.

He covers economics and insurance at MoneyGeek, and his work has been featured in The Washington Post, The New York Times and NPR, among other outlets.

Like all MoneyGeek analysts, he draws on independent cost and consumer experience data. No insurance company partnership influences his recommendations.

Mark holds a B.A. from Boston College and an M.A. in Economics and International Relations from Johns Hopkins University. He started his career in financial risk management at State Street and is also a five-time “Jeopardy!” champion.

Read Full Bio »

Sources

HealthCare.gov. "Welcome to the Health Insurance Marketplace." Accessed July 17, 2026.

Best Health Insurance in South Dakota (2026)

Best Health Insurance Companies in South Dakota

Sanford Health Plan

Wellmark of South Dakota

Which Is the Best Health Insurance in South Dakota by Age and Plan Type?

Compare Health Insurance Companies in South Dakota

How to Find the Best Health Insurance in South Dakota

How Much Does Health Insurance Cost in South Dakota?

Best South Dakota Health Insurance: FAQ

Is health insurance required in South Dakota?

When is open enrollment in South Dakota?

Can you get free health insurance in South Dakota?

What is the cheapest health insurance in South Dakota?

How We Chose the Best Health Insurance in South Dakota

Related Pages

Sources