Do American Indians in Florida need Medicare Part B and Part D if they use IHS or tribal clinics?

Part B: why enrolling on time matters

Part B covers doctors, outpatient care, tests and medical equipment. Using IHS or a tribal clinic doesn't change Part B's rules:

• The late penalty applies. If you don't sign up when you're first eligible, your premium can go up 10% for each full 12-month period you could have had Part B, for as long as you have it. Tribal and IHS care aren't coverage from current employment, so they don't give you a Special Enrollment Period to sign up later without the penalty.
• IHS expects Medicare to pay first. IHS is the payer of last resort for referred care (42 CFR 136.61), and IHS says an individual must apply for and use alternate resources "such as Medicare A and B."

Most people pay $202.90 a month for Part B in 2026. CMS adds that enrolling brings your tribal health program more resources.

Part D: no penalty if you wait

CMS's drug coverage guide says health care from the Indian Health Service, a Tribe or Tribal Organization, or an Urban Indian Organization includes creditable prescription drug coverage, so you won't pay a Part D late enrollment penalty if you join a Medicare drug plan later (42 CFR 423.56 lists it as creditable). Ask your Indian health care provider for a letter saying you have creditable coverage.

Joining can still make sense: CMS says a Medicare drug plan pays the Indian health facility for your drugs, and you'll keep getting drugs from an Indian health pharmacy at no cost.

In Florida

Florida's two federally recognized tribes, the Seminole Tribe of Florida and the Miccosukee Tribe of Indians of Florida, run their own health programs with IHS support. Each program sets its own eligibility rules, so ask yours how it works with Medicare.

What to do

1. Sign up for Part A and Part B during your Initial Enrollment Period. It runs 7 months around your 65th birthday. Apply at ssa.gov or 1-800-772-1213 (TTY 1-800-325-0778).
2. Get your creditable coverage letter from your Indian health provider.
3. Talk to your tribal health program before choosing a plan, especially a Medicare Advantage plan, whose network may not include your clinic. You can also request a call from a licensed insurance agent.

More in our guide to the Seminole Tribe, the Miccosukee Tribe and Medicare and turning 65 in Florida.

Related questions

Sources

• CMS — Your Guide to Medicare Drug Coverage (Product No. 11109, June 2026)
• CMS Division of Tribal Affairs — Medicare and Tribal Medicare Beneficiaries
• eCFR — 42 CFR 136.61, Payor of last resort
• eCFR — 42 CFR 423.56, Creditable coverage
• Indian Health Service — Purchased/Referred Care eligibility requirements

More questions in this guide

• Does IHS Purchased/Referred Care pay after Medicare in Florida?
• How does Medicare work with the Miccosukee health clinic?
• Can Seminole Tribe of Florida members use tribal health clinics with Medicare?

Part of the guide: The Seminole Tribe, the Miccosukee Tribe and Medicare in Florida · All questions

Frequently asked questions

Medicare in your Florida county

Plans, local agents and help, county by county: Miami-Dade · Broward · Palm Beach · Hillsborough · Orange · Duval · Pinellas · Lee · Polk · Pasco · Brevard · Volusia · Seminole · Sarasota · Osceola · Manatee · Lake · Marion · Collier · St. Lucie · All 67 counties →