Why Medicare still matters
IHS and tribal clinics provide care; they don't insure you. Federal rules make IHS Purchased/Referred Care (PRC) the payer of last resort: under 42 CFR 136.61, IHS won't pay for care when a patient has, or could get by applying, other coverage such as Medicare, Medicaid or private insurance. IHS also says PRC is not an entitlement, and a referral doesn't guarantee payment.
Medicare helps in three ways:
- Your clinic can bill Medicare. CMS says your Indian health care provider bills Medicare for you. IHS says third-party revenue a facility collects stays at the local level, where it supports services.
- Care outside the clinic. Medicare covers specialists, hospitals and emergencies anywhere in the U.S. that take Medicare, which matters in rural Oregon.
- Help with PRC. With Original Medicare, CMS says your clinic's PRC program will coordinate referrals and often pays Medicare deductibles, copays and coinsurance, if you're eligible for PRC.
Enrollment rules are the same
There are no special Medicare enrollment periods for American Indians and Alaska Natives. Your Initial Enrollment Period runs from three months before the month you turn 65 to three months after. Because IHS and tribal care isn't job-based coverage, skipping Part B can bring a late penalty of 10% of the standard premium ($202.90 a month in 2026) for each full year you went without it.
Part D is different: CMS notes that drug coverage through IHS can be creditable, so you may not owe a Part D penalty if you join later. A Part D plan still lets your clinic's pharmacy bill the plan, and some tribes sponsor Part D premiums.
Help paying
If your income is limited, a Medicare Savings Program can pay your Part B premium, and Extra Help lowers drug costs. You can apply through ONE Oregon at benefits.oregon.gov or 1-800-699-9075. Your clinic's benefits or patient registration staff can often help you sign up for Medicare too.
Next steps
Apply for Medicare at SSA.gov or 1-800-772-1213. Before choosing a Medicare Advantage plan, ask your clinic which plans it works with. To compare Medicare options you can request a call from a licensed insurance agent. More in our guide to tribal health and Medicare and the list of Oregon's nine federally recognized tribes.
Related questions
Can I use my tribal clinic with Medicare?
Oregon's tribal clinics and Medicare.
How do I apply for a Medicare Savings Program?
Help with the Part B premium.
When should I sign up for Medicare at 65?
Your enrollment window.
Sources
- 42 CFR 136.61 — Payor of last resort
- Indian Health Service — Purchased/Referred Care
- CMS Tribal Affairs — Medicare and Tribal Medicare Beneficiaries
- CMS — American Indian/Alaska Native: Important facts about Medicare
- Indian Health Service — Medicaid and Medicare enrollment pilot (third-party revenue stays local)
More questions in this guide
Part of the guide: Tribal Health and Medicare in Oregon · All questions
Frequently asked questions
Do American Indians pay Medicare premiums?
Yes, the same as everyone: most people pay no Part A premium, and Part B has a monthly premium. CMS notes that some tribes pay Medicare premiums for their members, called sponsorship; ask your clinic whether your tribe does.
Will I pay a late penalty if I only use IHS?
You can. IHS and tribal care isn't coverage from a current job, so it doesn't let you delay Part B without a penalty. CMS says IHS drug coverage can count as creditable for Part D.
Do I have to use a Medicare Advantage plan?
No. Original Medicare works with any clinic that takes Medicare. CMS suggests checking with your Indian health care provider before joining a Medicare Advantage plan, because not every clinic is in every plan's network.
Medicare in your Oregon county
Plans, local agents and help, county by county: Multnomah · Washington · Clackamas · Lane · Marion · Jackson · Deschutes · Linn · Douglas · Yamhill · Benton · Polk · Josephine · Umatilla · Klamath · Coos · Columbia · Lincoln · Clatsop · Malheur · All 36 counties →
