State guide

How to pay less for medication in South Dakota

The state programs and rules that affect what you pay for prescriptions in South Dakota, plus the nationwide help that works everywhere.

Last checked October 1, 2026

Medicaid expansion	Yes
State insulin copay cap	None (Medicare and maker $35 programs still apply)
Health insurance marketplace	HealthCare.gov
State drug help programs	None listed besides the HIV program (ADAP)

Medicaid in South Dakota

South Dakota expanded Medicaid. Adults under 65 with income up to 138% of the federal poverty level can qualify, and most prescriptions cost little or nothing.

You can apply for Medicaid any time of year. Find your state agency through Medicaid.gov.

Insulin

South Dakota doesn’t have its own insulin copay cap. Medicare still caps covered insulin at $35 a month, and Lilly, Novo Nordisk and Sanofi each offer $35-a-month programs outside Medicare.

All $35 insulin programs →

HIV medication

South Dakota runs an AIDS Drug Assistance Program (ADAP) that helps pay for HIV medication. See HIV.gov to find it.

On Medicare in South Dakota?

Your State Health Insurance Assistance Program (SHIP) gives free, unbiased Medicare help. Find it at shiphelp.org or call 877-839-2675.
Check whether you qualify for Extra Help, which can cut copays to a few dollars.
Open enrollment runs October 15 to December 7. Use our checklist.

Help that works in every state

Look up your medication for its drugmaker program, generics and cash prices.
Community health centers in South Dakota charge by income.
Six ways to pay less, and what to do with no insurance.

Common questions

Did South Dakota expand Medicaid?

South Dakota expanded Medicaid. Adults under 65 with income up to 138% of the federal poverty level can qualify, and most prescriptions cost little or nothing.

Does South Dakota cap insulin costs?

South Dakota doesn’t have its own insulin copay cap. Medicare still caps covered insulin at $35 a month, and Lilly, Novo Nordisk and Sanofi each offer $35-a-month programs outside Medicare.

Where do I buy a Marketplace health plan in South Dakota?

South Dakota uses HealthCare.gov.

Sources: KFF (Medicaid expansion) · American Diabetes Association (insulin caps) · NCSL (state programs) · healthinsurance.org (marketplaces). Last checked October 1, 2026.