Yes, Native Seniors in Coconino County Can Use Both IHS and Medicare at the Same Time — Here's What It Actually Means for Your Wallet, Your Pharmacy, and Your Doctor at Tuba City

Someone in the family typed this into Google, and I'm glad they did. Because this question — "can Native Americans use both IHS and Medicare at the same time?" — is one of the most important healthcare questions our elders in Coconino County face, and the answer from most government websites is buried under so much bureaucratic language it might as well be written in a foreign language. Let me give you the plain version.

Coconino County is the second-largest county by area in the contiguous United States. It is home to portions of the Navajo Nation — the largest tribal nation in America — as well as the Hopi Tribe and other communities. Tuba City sits near the center of the Navajo Nation, roughly 80 miles from Flagstaff. That distance is not an abstraction. It is the gap between a specialist appointment and not having one. It is the difference between a medication in stock and a two-week wait. For our elders living on fixed income in this county, understanding how IHS and Medicare work together is not an academic exercise. It is survival planning.

What Does It Mean That IHS Is a Treaty Obligation — Not a Benefit Program?

Let me say this plainly, because it matters to everything else in this article: the Indian Health Service exists because tribal nations ceded land — roughly 500 million acres of it — in treaties with the United States government. In exchange, the federal government promised to provide healthcare, among other things. This is not charity. It is a contractual debt.

That distinction changes the conversation entirely. When IHS is underfunded — and it is chronically underfunded, currently receiving roughly 55 cents on the dollar compared to what the federal government spends on prison healthcare per capita — that is not a budget inconvenience. That is a broken promise. When Tuba City Regional runs out of a blood pressure medication, that is not a supply chain problem. That is the United States failing to honor its word to the Diné people.

Medicare, on the other hand, is a federal insurance program funded through payroll taxes that most workers pay for 40+ years of their working life. Native elders who worked on or off the reservation have generally paid into Medicare just like everyone else.

Using both systems isn't double-dipping. It's collecting on two separate debts owed to you.

How Do IHS and Medicare Actually Work Together at Tuba City Regional?

Tuba City Regional Health Care Corporation (TCRHCC) — located at PO Box 600, Tuba City, AZ 86045, phone (928) 283-2501 — is a tribally operated facility under the Indian Self-Determination and Education Assistance Act (P.L. 93-638). It is one of the primary sources of healthcare for Diné elders in the western portion of the Navajo Nation within Coconino County.

Here is what happens when a Medicare-enrolled elder receives care at TCRHCC:

1. TCRHCC provides the care. The elder does not pay anything at the point of service — IHS-funded facilities do not charge eligible Native patients.
2. TCRHCC bills Medicare directly. The facility recovers reimbursement from Medicare, which goes back into the facility's operating budget — meaning more services, more staff, more medications.
3. Medicare's cost-sharing requirements are waived for IHS patients. Normally, Medicare Part A carries a $1,676 deductible (2026) and Part B carries a 20% coinsurance. Native patients at IHS/tribal facilities pay neither. Zero.
4. The elder pays nothing. And the facility gets funded. This is the system working as intended.

When TCRHCC bills Medicare for your care, it keeps that money. Every dollar it recovers reduces its reliance on the always-underfunded IHS line-item appropriation. In a very real sense, enrolling eligible elders in Medicare is one of the most direct ways to increase healthcare funding at TCRHCC — without waiting for Congress to act.

Sources: CMS.gov Medicare Cost-Sharing 2026; CMS Extra Help/LIS Program; Arizona Health Care Cost Containment System (AHCCCS).

What About Elders Who Need to Go Outside of IHS — What Does Medicare Cover Then?

This is where things get complicated, and I want to be honest with you about the gaps rather than paint a rosy picture.

IHS facilities — including TCRHCC — do not provide every type of specialty care on-site. When a Diné elder needs a cardiologist, a neurologist, an orthopedic surgeon, or a cancer specialist, the facility must issue a "Contract Health Services" (CHS) or "Purchased/Referred Care" (PRC) referral. Historically, this program has been one of the most chronically underfunded parts of IHS. When the PRC budget runs out — which happens — referrals stop being authorized. The IHS phrase for this is a Priority 1 cutoff. Our elders know what that means. "Come back next fiscal year."

This is precisely where Medicare becomes not just useful but essential for elders on fixed income. If you have Medicare Part B and you receive a referral to a specialist in Flagstaff or Phoenix, Medicare can cover that visit — at an off-reservation provider — as long as that provider accepts Medicare assignment. You still face the standard 20% coinsurance unless you have a Medigap supplement or a Medicare Advantage plan that covers it, which we'll address below.

The county's main referral hospital is Flagstaff Medical Center, located at 1200 North Beaver Street, Flagstaff, AZ 86001, phone (928) 779-3366. It is an acute care hospital with a CMS overall quality rating of 4 out of 5 stars and full emergency services. It is Medicare-certified. If IHS refers your elder there, Medicare can pay — and should.

Page Hospital, at 501 North Navajo Drive, Page, AZ 86040, phone (928) 645-2424, is the county's Critical Access Hospital — meaning it qualifies for higher Medicare reimbursement rates specifically designed to keep rural hospitals open. It has emergency services. It serves communities in the northern Coconino area including members of the Navajo Nation near Lake Powell. Its CMS overall quality rating is listed as "Not Available" in the current CMS Hospital Compare data, which is itself a data point worth knowing.

Coconino County Hospital Landscape at a Glance

Here is a simple breakdown of the four CMS-listed hospitals in Coconino County and what each offers:

Source: CMS Hospital Compare database, April 2026. TCRHCC is a tribally operated facility under P.L. 93-638; CMS star ratings do not apply in the same framework. No emergency room listed in CMS data for TCRHCC — contact the facility directly at (928) 283-2501 for urgent care options.

What Does the Health Data Actually Tell Us About What Coconino County Elders Need Most?

Health data is not just numbers. It is a map of where the system is failing people. The CDC PLACES data for Coconino County (2023) tells a story that any IHS administrator who has worked this region already knows in their bones.

Source: CDC PLACES County Health Data, Coconino County AZ, 2023. cdc.gov/places

That 22.5% depression figure is not a coincidence. It reflects the cumulative weight of historical trauma, poverty, geographic isolation, and a healthcare system that has chronically underserved our communities. The Guidance Center at 2187 North Vickey Street, Flagstaff, AZ 86004, phone (928) 527-1899, is the county's designated psychiatric hospital — but it is in Flagstaff, not Tuba City, not Page. For an elder living on the Navajo Nation with mobility disability (11.2% of adults in this county) and no reliable transportation, that distance is a treatment barrier.

The asthma rate of 11.7% matters because IHS pharmacies — already strained — are the primary source of respiratory medications for many elders. When IHS runs short of albuterol or budesonide, Medicare Part D coverage becomes a literal lifeline, not an administrative convenience. And the 10.3% rate of complete tooth loss among adults 65+ (CDC PLACES 2022) points to the near-total absence of dental coverage in traditional Medicare — a gap that affects nutrition, speech, and overall health for elders who may live hundreds of miles from the nearest dentist who accepts Indian Health Service Contract Health Services referrals.

Does Medicare Cost Money Every Month — And What If a Fixed-Income Elder Can't Afford It?

This is the question that keeps families up at night, and it deserves a straight answer. Here is the 2026 breakdown:

Sources: CMS.gov Medicare 2026 Cost Fact Sheet; AHCCCS Medicare Savings Program; CMS Extra Help Program.

There is a provision in federal law — Section 1024 of the Medicare Modernization Act — that automatically qualifies all federally recognized tribal members who receive both Medicare and Medicaid (including through AHCCCS) for the Extra Help / Low Income Subsidy program. No separate application required. This is one of the most under-claimed benefits in Indian Country. If your elder is on a fixed income and enrolled in both Medicare and AHCCCS, they should be receiving Extra Help automatically. If they are paying full Part D premiums, something went wrong in the system — and it is worth a phone call to 1-800-MEDICARE (1-800-633-4227) to investigate.

What About Medicare Advantage Plans — Should Coconino County Native Seniors Enroll?

This is where I want you to slow down and think carefully, because the answer is genuinely complicated for our elders — and the wrong choice can create real problems.

Medicare Advantage (Part C) plans — sold by private insurers like UnitedHealthcare, Humana, Aetna, and others — replace Original Medicare Parts A and B with a managed care product. They often include dental, vision, and hearing benefits that Original Medicare does not cover. For many seniors in urban areas, they can be a good deal.

For Native seniors in Coconino County, there are specific considerations that the TV commercials do not mention:

• Network access: Most Medicare Advantage HMO and PPO plans require you to see doctors within their network. The networks in rural Coconino County are thin. If a plan's network doesn't include TCRHCC or providers close to the Navajo Nation, an elder may face balance billing or denied claims for services that would have been covered under Original Medicare.
• IHS coordination: IHS and tribally operated facilities can still bill Medicare Advantage plans, but the billing relationship and reimbursement rates are more complex than with Original Medicare. Some plans handle this better than others.
• Special Enrollment Protections: Native Americans have special Medicare enrollment rights — they can join, switch, or drop Medicare Advantage plans once per calendar quarter (January through September) and return to Original Medicare. This is a protection most enrollees don't have, and it means if a plan doesn't work, our elders can get out.
• D-SNP plans: Dual Special Needs Plans (D-SNPs) are specifically designed for people who have both Medicare and Medicaid (AHCCCS). These plans can offer additional benefits — transportation, meal delivery, over-the-counter allowances — that are genuinely valuable for elders on fixed income. If an elder qualifies for AHCCCS, a D-SNP is worth exploring with a SHIP counselor.

I am not going to tell you which plan to pick — that is not my job and it wouldn't be appropriate. What I will tell you is to call the Arizona SHIP line before enrolling in anything, and to ask specifically: "Does this plan include Tuba City Regional Health Care Corporation and Flagstaff Medical Center in its network?"

What Specific Steps Should a Coconino County Native Elder (or Their Family) Take Right Now?

What About Behavioral Health — Depression Is at 22.5% in This County. What Does Medicare Actually Cover?

One number from the CDC PLACES data I want to return to: 22.5% of adults in Coconino County report depression. That is not a small number. Among elders on fixed income, dealing with chronic illness, physical isolation, and often profound grief for a way of life that has been eroded over generations, that number makes sense. It doesn't make it acceptable, but it makes sense.

Original Medicare Part B covers mental health services — outpatient therapy, psychiatric evaluation, depression screening — at the same 80/20 cost-sharing as medical services. At an IHS or tribally operated facility, the 20% coinsurance is waived. The Guidance Center in Flagstaff (928) 527-1899 is a Medicare-certified psychiatric facility and serves the county's behavioral health needs, though access from the reservation requires transportation that many elders do not have.

IHS facilities are also authorized to provide behavioral health services. TCRHCC has behavioral health programs. If your elder is reluctant to seek help outside of the community — and that reluctance is entirely understandable — the starting point is the TCRHCC behavioral health department, not Flagstaff.