You generally qualify for Indian Health Service care if you are of American Indian or Alaska Native descent and you belong to the Indian community the local IHS or tribal facility serves. There is no income test, no premium, and no monthly enrollment fee. Enrollment in a federally recognized tribe is the most common way to prove it, but federal regulation at 42 CFR 136.12 also accepts descendancy from an enrolled member, residence on tax-exempt or restricted land, active participation in tribal affairs, and other evidence that the community regards you as Indian. Eligibility for direct care at an IHS or tribal facility is a separate question from eligibility for Purchased/Referred Care, which pays outside providers and adds a residency requirement most people do not know about until a bill arrives.
This guide covers the eligibility rules only. For what IHS funds, how 638 contracting works, and the other federal tribal programs, see our guide to tribal benefits programs.
The Three Systems, and Who Each One Covers
IHS is not one benefit. It is three delivery routes with overlapping but different eligibility tests. Knowing which one you are using explains most of the confusion people hit.
| Route | What it is | Core eligibility test | Residency test |
|---|
| Direct care | Services delivered at an IHS, tribal, or 638-operated hospital, clinic, or health station | AI/AN descent plus membership in the Indian community the facility serves | Set by the facility's own service population; no national residency form |
| Purchased/Referred Care (PRC) | IHS or a tribe pays an outside hospital or specialist for care the facility cannot provide | AI/AN descent, plus authorization, plus medical priority | Must live in the PRC Delivery Area (PRCDA), formerly called the CHSDA |
| Urban Indian health programs | 41 nonprofit urban Indian organizations (UIOs) across 37 states, funded under the Indian Health Care Improvement Act | Broader statutory definition of "urban Indian," including first and second degree descendants | Must live in the urban center the organization serves |
Together these cover roughly 2.8 million American Indian and Alaska Native people through more than 600 federal and tribal facilities plus the 41 UIOs.
Direct Care Eligibility: Membership, Descendancy, and Community
For direct care at an IHS or tribally operated facility, the regulation sets two conditions. You must be of American Indian or Alaska Native descent, and you must belong to the Indian community the program serves.
The second half is the part people miss. Tribal enrollment is the cleanest evidence, but it is evidence, not the rule itself. The Indian Health Manual lists factors any one of which can support eligibility:
- Enrollment or membership in a federally recognized tribe, band, or group under federal supervision
- Documentation that you descend from an enrolled member of a federally recognized tribe
- Residence on tax-exempt land, or ownership of restricted property
- Active participation in tribal affairs
- Any other reasonable factor indicating Indian descent
If your tribe is federally recognized and you are enrolled, you are eligible and the registration visit is short. If you are a descendant who never enrolled, often because your tribe uses a lineal descendancy or blood quantum rule you fall outside of, you can still be found eligible under the descendancy and community factors, but the facility has to make that determination from the documents you bring.
A practical note on emergencies. If you need immediate care and your status is in doubt, the manual directs the facility to treat you while identification as an Indian beneficiary is pending. Do not delay an emergency visit over paperwork.
Non-Indian Family Members Who Can Be Covered
IHS eligibility extends past AI/AN individuals in four specific situations. Each has its own limit.
| Who | Coverage | Limit |
|---|
| Non-Indian children of an eligible Indian, including natural, adopted, step, foster, and legal ward children | Full services | Until age 19 |
| Spouse of an eligible Indian, same-sex or opposite-sex | Services the facility provides | Only if the tribe or tribal organization's governing body approves by resolution |
| Non-Indian woman pregnant with an eligible Indian's child | Prenatal through postpartum care | Pregnancy through roughly 6 weeks postpartum; paternity acknowledged in writing or by court order |
| Non-Indian household member of an eligible Indian | Only the service needed | Only when medically necessary to control a public health hazard or acute infectious disease |
The spouse rule is the one worth calling your facility about, because it is not automatic anywhere. It depends on whether your tribe has passed a resolution extending services to non-Indian spouses.
Purchased/Referred Care: The Residency Rule That Surprises People
When an IHS or tribal facility cannot provide the care you need, it can pay an outside provider through Purchased/Referred Care. PRC was called Contract Health Services until 2014, and the service area was called the Contract Health Service Delivery Area, or CHSDA. You will still see both names on older forms and in tribal resolutions. PRC eligibility is narrower than direct care eligibility in five ways.
1. You must live in the PRC Delivery Area. The PRCDA is generally the reservation, trust land, and the counties that border the reservation, plus tax-exempt land. Some tribes have negotiated expanded areas. Living two counties over from a facility you have used for years can mean you qualify for direct care there and not for PRC through it.
2. Two residency exceptions exist. Students temporarily away for schooling stay eligible, with coverage ending 180 days after completion or departure. People who live outside the PRCDA but maintain close social and economic ties to the tribe can also qualify, which is a facility determination, not a form you self-certify. If you move from one reservation to another, there is a 180-day transition window before you establish residency in the new PRCDA.
3. The care has to be authorized in advance. Non-emergency care needs notification to the ordering official before you receive it. The referral goes through a managed care committee. A bill from a specialist you saw on your own initiative is usually not something PRC can pay.
4. Emergency care has a notification clock. In an emergency you, a family member, or the provider must notify the PRC program within 72 hours of the start of treatment or admission. People who are 65 or older and people with disabilities get 30 days instead. The 72 hour window can be extended if the ordering official finds that earlier notice was impracticable or there was other good cause. Missing the clock is one of the most common reasons a PRC claim is denied, and it is avoidable.
5. You must use alternate resources first. PRC is a payer of last resort by law. You have to apply for and use any other coverage available to you, including Medicare Part A and B, Medicaid, CHIP, a Marketplace plan, veterans coverage, workers compensation, and private insurance. If you are eligible for Medicaid and do not apply, PRC can deny payment. This requirement is specific to PRC. Direct care patients are not subject to the alternate resources rule, which is why you can walk into an IHS clinic uninsured and be seen.
PRC also runs on a fixed annual budget and funds care by medical priority. Programs authorize the highest priority categories first, starting with emergent and acutely urgent care where there is a threat to life, limb, or senses. In a tight budget year a program may be authorizing only the top priority level, which means a referral for preventive or chronic care can be medically approved and still go unfunded until the next fiscal year. Ask your PRC office which priority levels it is currently funding before you assume a referral will be paid.
If You Live Outside a Service Area
Most American Indian and Alaska Native people now live in urban areas, away from reservation facilities. The urban Indian health program exists for exactly that situation, and its eligibility definition is deliberately broader than the direct care rule.
Under the Indian Health Care Improvement Act, an eligible "urban Indian" lives in a designated urban center and meets at least one of these:
- Member of a tribe, band, or organized group of Indians, including state-recognized tribes and groups terminated since 1940
- First or second degree descendant of a qualifying tribal member
- Alaska Native, including Eskimo and Aleut
- California Indian, meaning a federally recognized tribal member, a descendant of an Indian residing in California on June 1, 1852, a holder of trust interests in California allotments, or someone listed for distribution of California rancheria or reservation assets
- Considered an Indian by the Secretary of the Interior for any purpose
- Determined to be Indian under HHS regulations for the urban health program
A second degree descendant, a grandchild of an enrolled member, can qualify for urban Indian program services even where the same person would face a harder documentation path at a reservation facility. If you have been told you are not eligible for IHS, check whether a UIO serves your city before concluding you have no Indian health option.
Documents to Bring
Facilities register new patients rather than process a benefits application, so the visit is usually one appointment if you arrive with the right paperwork.
| Purpose | Documents accepted |
|---|
| Indian descent | Tribal enrollment or citizenship card, Certificate of Degree of Indian Blood (CDIB), a letter from the tribe confirming your or a parent's eligibility, BIA certification of enrollment, or tribal records showing you meet the tribe's own membership criteria |
| Descendancy | Birth certificate linking you to an enrolled parent or grandparent, plus that relative's enrollment card or CDIB. A parent's CDIB can work even if your name is not on it |
| PRC residency | Form IHS-976 Proof of Residency at federal IHS sites, supported by a driver's license or state ID with your current address, a lease or mortgage document, a recent utility bill, or government correspondence showing your address |
| Other coverage | Medicaid, Medicare, CHIP, Marketplace, or private insurance cards, so the facility can bill and so PRC's alternate resources rule is satisfied |
How to Register
- Find the right provider. Use the facility locator on ihs.gov for IHS and tribal facilities, or search for an urban Indian organization if you live in a city. Your tribe's health department can tell you whether services near you are run by IHS directly or by the tribe under a 638 contract.
- Call the business office or patient registration before you go and ask what proof of descent and proof of residency they require. Requirements vary by area office.
- Register in person with your documents. You receive a patient chart number, and in most places a health record identification card.
- Ask to be screened for other coverage at the same visit. Most facilities have a benefits coordinator or patient benefits advocate whose job is enrolling patients in Medicaid, CHIP, or Marketplace plans. This protects your PRC eligibility and brings reimbursement into the facility.
- If you may need outside care, ask about PRC separately. Confirm whether your address is inside the PRCDA, who the ordering official is, and what the notification process is for an emergency.
How IHS Eligibility Interacts With Other Coverage
Being IHS eligible changes how several other programs treat you, and the rules are favorable.
- Marketplace coverage. Members of federally recognized tribes and Alaska Native Claims Settlement Act shareholders can enroll or change plans monthly, year round, instead of waiting for open enrollment. Those with household income from 100% to 300% of the federal poverty level can take a zero cost sharing plan with no copays, deductibles, or coinsurance. Anyone eligible for services from an Indian health care provider, at any income, can take a limited cost sharing plan with no cost sharing on care received through an Indian health provider or by referral. For 2027 coverage sold starting November 1, 2026, those income percentages are measured against the 2026 poverty guidelines.
- Medicaid work requirement. The new federal community engagement requirement takes effect in expansion states no later than January 1, 2027, with some states starting earlier. American Indians and Alaska Natives are exempt, and CMS's interim final rule applies that exemption to members of federally recognized tribes and to people who qualify for care through the Indian Health Service.
- Medicaid 6-month renewals. Expansion adults renewing on or after January 1, 2027 generally must renew every 6 months. American Indians and Alaska Natives are exempt from that rule as well.
- Income from tribal sources. Per capita payments, trust land royalties, and similar income are treated differently across programs. See our guide on tribal income and benefit eligibility.
Other tribal programs have their own eligibility rules that do not track IHS: Tribal TANF and the Lifeline tribal lands discount are both worth checking separately.
Frequently Asked Questions
Do I have to be an enrolled tribal member to get IHS care?
No. Enrollment in a federally recognized tribe is the most direct proof, but 42 CFR 136.12 and the Indian Health Manual also recognize descendancy from an enrolled member, residence on tax-exempt or restricted land, active participation in tribal affairs, and other reasonable evidence of Indian descent combined with belonging to the community the facility serves. Bring whatever documentation you have and let the facility make the determination.
Is there an income limit for Indian Health Service eligibility?
No. IHS is not means tested. Eligibility turns on Indian descent and community membership, not on household income, and there are no premiums or enrollment fees for direct care. That is the main structural difference between IHS and Medicaid.
What is the difference between direct care and Purchased/Referred Care?
Direct care is service you receive at an IHS, tribal, or 638-operated facility. PRC is IHS or a tribe paying an outside provider for care the facility cannot deliver. PRC adds requirements direct care does not have: you must live in the PRC Delivery Area, the care must be authorized, it must meet the program's current medical priority level, and you must use any other coverage first.
I live in a city far from any reservation. Can I still get care?
Often yes, through one of the 41 urban Indian organizations operating in 37 states. Their eligibility definition is broader than the reservation facility rule and includes first and second degree descendants of tribal members, Alaska Natives, California Indians, and members of state-recognized tribes. You must live in the urban center the organization serves.
How long do I have to report an emergency room visit to PRC?
Within 72 hours of the start of treatment or admission. People 65 and older and people with disabilities have 30 days. The window can be extended if the ordering official finds prior notice was impracticable or there was other good cause, but the safe approach is to call the PRC office from the hospital.
Can my non-Indian spouse get care at an IHS facility?
Only if the tribe or tribal organization's governing body has passed a resolution extending services to non-Indian spouses. It is not automatic and it varies by tribe. Non-Indian children of an eligible Indian, by contrast, are covered until age 19 without a resolution.
Does being IHS eligible mean I should skip Medicaid or a Marketplace plan?
No. Enrolling in other coverage is usually the better move. PRC requires you to use alternate resources before it will pay, so skipping Medicaid you qualify for can cost you a PRC denial. Other coverage also lets your facility bill for your care, which stretches the budget serving everyone else in your community.
Will the new Medicaid work requirement apply to me?
If you are American Indian or Alaska Native, no. CMS's interim final rule exempts American Indians and Alaska Natives, including members of federally recognized tribes and people eligible for Indian Health Service care, from the 80 hour per month community engagement requirement that expansion states must implement no later than January 1, 2027. Keep documentation of your tribal membership or IHS eligibility with your renewal paperwork so the exemption is on record.
