Someone typed "IHS vs Medicare which to use Indian Health Service" into a search bar. That person is probably the adult child of one of our elders, sitting in Gallup or Window Rock or Crownpoint, trying to figure out a system that is genuinely complicated — not because our elders aren't smart, but because the system was designed by people who never had to navigate it themselves.
Let me put eighteen years of IHS administration to work for you right now.
Before We Begin: The Treaty Fact That Changes Everything
IHS healthcare is not a government benefit program. It is a treaty obligation. The United States government signed treaties with Native nations — including the Navajo Nation and the Pueblo of Zuni — promising healthcare in exchange for land. When IHS is underfunded, that is not a "budget issue." That is a broken promise measured in acres.
The federal government is legally obligated to provide healthcare to eligible Native Americans. Medicare is social insurance you've paid into through payroll taxes. They are completely different legal frameworks. You are entitled to both. Never let anyone tell you otherwise.
What Exactly Is IHS — and Who Is Eligible in McKinley County?
The Indian Health Service is a federal agency within the Department of Health and Human Services. It operates facilities across Indian Country, including three facilities in McKinley County, New Mexico, serving primarily Navajo Nation and Zuni Pueblo members.
Eligibility for IHS services is based on membership in a federally recognized tribe. In McKinley County, that primarily means members of the Navajo Nation and Pueblo of Zuni, though members of any federally recognized tribe are generally eligible to receive care at IHS facilities. There is no income test, no premium, and no cost-sharing at IHS facilities for eligible individuals.
| Facility | City | Phone | Emergency Services | CMS Star Rating |
|---|---|---|---|---|
| Gallup Indian Medical Center | Gallup, NM 87301 | (505) 722-1000 | ✅ Yes | 2 of 5 |
| Crownpoint Healthcare Facility | Crownpoint, NM 87313 | (505) 786-5291 | ✅ Yes | |
| Zuni Comprehensive Community Health Center | Zuni, NM 87327 | (505) 782-4431 | ❌ No | |
| Rehoboth McKinley Christian Health Care Services (Critical Access Hospital — not IHS) |
Gallup, NM 87301 | (505) 863-7000 | ✅ Yes |
Source: CMS Hospital Compare data, accessed April 2026.
Notice something important in that table: Zuni Comprehensive Community Health Center has no emergency services. If a Zuni elder has a stroke or cardiac event, they cannot go there. Gallup Indian Medical Center — 40 miles away — is the nearest IHS emergency facility. That distance is not a footnote. At a 6% stroke rate (CDC PLACES 2023), that is a clinical reality our elders live with.
What Is Medicare — and How Is It Different from IHS?
Medicare is federal health insurance for people 65 and older and for certain people with disabilities. You become eligible based on age (or disability status), not tribal membership. Most people qualify for Part A (hospital coverage) for free, based on work history. Part B (outpatient care) costs $185.00/month in 2026 — but many McKinley County elders qualify for the Medicare Savings Program, which can eliminate that premium entirely.
Medicare has four parts you need to understand:
Medicare's Four Parts — Plain Language
- Part A — Hospital Insurance: Covers inpatient hospital stays, skilled nursing facility care, some home health care. Most people pay $0 premium for Part A.
- Part B — Medical Insurance: Covers doctor visits, outpatient services, preventive care, durable medical equipment. Standard premium: $185/month in 2026.
- Part C — Medicare Advantage: A private insurance alternative that bundles A+B (and often D). Available in McKinley County — with critical limitations discussed below.
- Part D — Prescription Drug Coverage: Covers prescription medications. Critical for our elders managing diabetes, heart disease, or other chronic conditions.
Can You Use Both IHS and Medicare? (Yes — and Here Is Why You Should)
This is the most important thing I will write in this article: IHS and Medicare are not either/or. They work together. Having Medicare does not disqualify you from IHS. Using IHS does not mean you don't need Medicare. They are two separate coverage systems that complement each other when used correctly.
Here is the mechanism: When a person with Medicare receives care at an IHS facility, the IHS facility bills Medicare as the "payer of last resort." Medicare pays its share. IHS absorbs the rest. The patient pays nothing out-of-pocket at the IHS facility. But the IHS budget now has more money from Medicare reimbursements to serve other patients. When our elders enroll in Medicare, they literally stretch IHS resources for everyone in the community.
"Every elder who enrolls in Medicare and uses IHS is doing a community service. IHS bills Medicare, recovers funds, and uses those dollars to serve the next patient in line. If you qualify for Medicare and haven't enrolled, you're leaving community money on the table."
When Should Our Elders Use IHS — and When Should They Use Medicare?
The data in that chart is not abstract. It is our elders. A 35.7% fair-or-poor health rate in a county of 68,797 people means roughly 24,500 adults who don't feel well on most days. A 6% stroke rate is nearly double the national average of 3.3%. A dental visit rate of only 47% tells you that dental care — completely outside traditional IHS coverage and requiring either a Medicare Advantage plan with dental benefits or a tribal program — is being skipped.
Here is the practical rule for when to use each system:
Practical Decision Guide: IHS vs. Medicare vs. Both
- Use IHS first for: Primary care visits, routine checkups, diabetes management, medications available in the IHS pharmacy, acute care emergencies at Gallup Indian Medical Center or Crownpoint. IHS costs you nothing. Always present your tribal enrollment card.
- Use Medicare when: You need specialty care (cardiology, oncology, neurology) that IHS refers out. You need care at Rehoboth McKinley Christian Health Care Services. You need durable medical equipment (wheelchairs, oxygen) that IHS cannot supply. IHS has referred you to an outside provider.
- Have BOTH active when: IHS Purchased/Referred Care (PRC) funds run out — and they do, often before the fiscal year ends. If PRC denies a referral because funds are exhausted, Medicare can step in immediately if you're enrolled. This is the critical safety net.
- Part D — Drug coverage: Check whether your medication is in the IHS formulary first. If it is, IHS pharmacy is free. If it isn't, you need an active Part D plan so you're not paying full cash price at an outside pharmacy.
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What Is the IHS Purchased/Referred Care System — and Why Does It Keep Failing Our Elders?
Purchased/Referred Care (PRC) — formerly called Contract Health Services — is the IHS program that pays for care our elders need but can't get at an IHS facility. Specialist visits. Surgeries. Advanced imaging. Care that requires traveling to Albuquerque or Farmington because McKinley County doesn't have it locally.
Here is the problem: PRC is funded by congressional appropriations, not by an entitlement formula. That means when Congress underfunds IHS (which it does, chronically — IHS receives roughly 40% of what an equivalent non-Native population receives in federal healthcare spending, according to the National Indian Health Board), PRC funds run dry. Our elders get referral denials. They get put on waiting lists. They go without care.
The phrase you will hear from IHS staff when PRC money runs out: "You'll need to find another way to cover this." For elders with Medicare, "another way" exists. For elders without Medicare, it often doesn't.
"PRC denial for a cardiac catheterization is not a paperwork problem. It is a life-or-death event. McKinley County's 6% stroke rate — nearly double the national average — is, in part, a PRC funding story."
Should Our Elders Enroll in a Medicare Advantage Plan — or Stick with Original Medicare?
This is where I need to slow down and be very specific about McKinley County, because the answer is different here than it might be in Albuquerque or Santa Fe.
Original Medicare (Parts A + B + standalone Part D) gives our elders the broadest access. Any Medicare-participating provider anywhere in the country is in-network. Rehoboth McKinley Christian Health Care Services accepts Original Medicare. If an elder needs to travel to the University of New Mexico Health Sciences Center in Albuquerque for specialty care, Original Medicare covers it without a prior authorization call to a private insurance company.
Medicare Advantage (Part C) plans are available in McKinley County, and some carry extra benefits — dental, vision, hearing — that Original Medicare does not cover. Those extra benefits are genuinely valuable. But there is a critical caveat specific to this geography: McKinley County's Medicare Advantage provider networks are thin. The county has only 4 hospitals. Only one — Rehoboth McKinley Christian — is a typical Medicare Advantage network participant. If an elder enrolls in a plan whose network doesn't include their Albuquerque specialist or their preferred pharmacy, they face costs that Original Medicare would have covered entirely.
Before enrolling in any Medicare Advantage plan in McKinley County, our elders — or their family members — should ask these exact questions:
5 Questions to Ask Before Enrolling in Medicare Advantage in McKinley County
- 1. Is my specialist in Albuquerque or Farmington in this plan's network? Get a name. Call the plan. Do not assume.
- 2. Is Rehoboth McKinley Christian Health Care Services in-network? At (505) 863-7000, 1901 Red Rock Drive, Gallup — the only Critical Access Hospital in McKinley County.
- 3. Does the plan's Part D formulary include my current medications? Check the plan's formulary tool at medicare.gov/plan-compare.
- 4. Does this plan require prior authorization for specialist referrals? HMO plans especially — prior auth from a Gallup-area PCP for a Albuquerque specialist can add weeks of delay.
- 5. Does this plan offer a Dual Eligible Special Needs Plan (D-SNP)? If the elder qualifies for both Medicare and Medicaid (called "dual eligible"), a D-SNP may offer the most comprehensive benefits for low-income McKinley County elders.
What About Elders Who Are "Dual Eligible" — Both Medicare and Medicaid?
Dual eligibility — qualifying