IHS + Medicare for Dual-Eligible Elders in McKinley County NM: What the 40.7% Colorectal Cancer Screening Rate Reveals About a System That Was Already Short-Changing Our Elders

Someone typed a very reasonable question into a search bar. Probably a son or daughter in Gallup, maybe a granddaughter calling from Albuquerque on behalf of a grandmother who still prefers to speak Navajo. The question was simple: Can Native Americans use both IHS and Medicare at the same time?

The answer is yes. But the more important question is what happens when you try — and what the data tells us about how well that "system" is actually working for our elders in McKinley County, New Mexico. Today I want to use colorectal cancer screening as the lens, because the numbers are stark, the problem is fixable, and our elders deserve to know exactly where things stand.

How Does the IHS + Medicare Dual System Actually Work?

Let me say this plainly, because it gets garbled in bureaucratic language: IHS healthcare is not a government benefit. It is a treaty obligation. The United States signed treaties with Native nations — Navajo, Zuni, and others — in exchange for land. Healthcare was part of that deal. IHS is the delivery mechanism for that promise.

Medicare is a separate federal insurance program you've earned — through work history, through paying into the system, or through disability — that kicks in at age 65 (or earlier for some disability cases).

When a Native elder holds both IHS eligibility and Medicare enrollment, here is the coordination of benefits:

1. IHS direct care first. If Gallup Indian Medical Center or Crownpoint can provide the service in-house, IHS provides it at no cost to the patient. Medicare is billed as a secondary payer, and IHS keeps those reimbursement dollars to fund more services.
2. PRC referral with Medicare as primary payer. If IHS cannot perform the service (no gastroenterologist on staff, equipment unavailable, wait time unacceptable for a clinical situation), Purchased/Referred Care (PRC) can authorize referral to an outside provider. At that point, Medicare becomes the primary payer and IHS/PRC covers remaining cost-share — in theory.
3. Medicare alone if PRC funds are exhausted. This is the gap nobody talks about enough. PRC funds run out. When they do, Medicare Part B still covers preventive colorectal cancer screening at 100% — zero cost-share for the beneficiary — but only if the elder has active Medicare enrollment and the outside provider accepts Medicare.

What Does the Colorectal Cancer Screening Rate in McKinley County Actually Tell Us?

The CDC PLACES 2022 data for McKinley County shows a colorectal cancer screening rate of 40.7% among adults aged 45–75 (confidence interval: 35.4%–45.8%). The New Mexico statewide rate is approximately 56%. The national Healthy People 2030 benchmark target is 68.8%.

That 28-percentage-point gap between McKinley County and the national target is not random. It maps directly onto: distance to specialists, PRC funding shortfalls, low Medicare Advantage enrollment, and 35.7% of adults reporting fair or poor health status (CDC PLACES 2023) — people who are already stretched thin and can't spend a day traveling for a screening they're not sure will be covered.

Among that 40.7%, I'd wager that dual-eligible Native elders — people who have both IHS access and Medicare — are not the ones getting screened. They're the ones who've been told "we'll refer you out" and then waited six months for an authorization that never came, or who drove to Albuquerque and got a bill in the mail three weeks later because the outside provider's billing department didn't know how to code an IHS-referred Medicare patient. That's not a hypothetical. That's Tuesday in Indian Country.

What Are the Actual Hospitals in McKinley County — and What Does the Data Say About Them?

McKinley County has four hospital-level facilities. Here is the full picture, using CMS Hospital Compare data and direct contact information:

A few things to understand about that table. Gallup Indian Medical Center's 2-star CMS rating is not a surprise to anyone who has worked in the system — GIMC has been chronically underfunded and understaffed for decades. The "Not Rated" designations for Zuni, Crownpoint, and Rehoboth McKinley are not necessarily a sign of poor quality; they reflect the limitations of CMS rating methodology for small, rural, and tribal facilities. But the absence of data is itself a form of accountability gap.

Zuni Comprehensive Community Health Center has no emergency services listed. That means Zuni elders who have a complication from a screening procedure — or any medical emergency — need to travel to Gallup or call 911 for ground transport on roads that are not always reliable.

What Medicare Plans Are Actually Available in McKinley County for Dual-Eligible Native Elders?

McKinley County's Medicare Advantage plan landscape is sparse by any measure. Rural New Mexico counties consistently have fewer plan options than urban areas, and McKinley County — with a population of 68,797 (per CDC PLACES) and significant geographic barriers — is no exception.

For 2026, dual-eligible Native elders in McKinley County should be aware of these realities regarding plan availability:

• Dual-eligible Special Needs Plans (D-SNPs) are available in New Mexico from a small number of carriers. UnitedHealthcare and Centene (through WellCare of New Mexico) have historically been among the D-SNP carriers operating in rural NM counties. However, plan availability is zip-code specific — what's available in Gallup (87301) may differ from Crownpoint (87313) or Zuni (87327).
• Traditional Medicare (Parts A and B) remains the most reliable option for Native elders in rural McKinley County precisely because it has no network restrictions. With traditional Medicare, any provider that accepts Medicare assignment — including outside gastroenterologists in Albuquerque — can bill directly. There is no "in-network" requirement.
• Medicare Part B covers preventive colonoscopies at 100% for average-risk beneficiaries. No copay, no deductible for the screening itself. This is one of the most underutilized benefits in Indian Country, because many elders (and some IHS staff) don't know that Medicare covers this independently of IHS PRC authorization.
• Medicare Part D for prescription drug coverage: if colonoscopy prep medications are required, Part D coverage varies by plan formulary. Elders using IHS pharmacy first should check whether their prep medications are stocked — some smaller IHS facilities have formulary gaps.

To see every plan available at your exact zip code in McKinley County, go to medicare.gov/plan-compare and enter your zip code. Do not rely on a mailer or a TV commercial — those are marketing materials, not comprehensive plan comparisons.

What Does the 35.7% "Fair or Poor Health" Rate Mean for Dual Enrollment?

CDC PLACES 2023 data shows that 35.7% of McKinley County adults self-rate their health as fair or poor (confidence interval: 31.4%–40.4%). That's more than one in three adults. For seniors, that rate is almost certainly higher.

People in fair or poor health are exactly who the dual IHS + Medicare system is supposed to serve. They are the people who need both systems working together — IHS for primary and culturally appropriate care, Medicare for specialist referrals and equipment. And yet, the cancer screening rate of 40.7% tells us that the system is failing precisely this population.

There's also a 6.0% stroke prevalence in McKinley County (CDC PLACES 2023, CI: 5.4%–6.7%) and a 5.6% non-skin cancer/melanoma prevalence (CI: 5.0%–6.3%). These numbers matter for colorectal screening because stroke survivors and cancer patients often need additional care coordination — and the dual IHS/Medicare system has no automatic care manager. Our elders have to navigate it themselves, or with family help, or with a Community Health Representative (CHR) if one is available in their area.

What About the 15.3% Uninsured Rate — Are Some Native Elders Not Enrolled in Medicare?

The CDC PLACES 2023 data for McKinley County shows a 15.3% uninsured rate among adults aged 18–64 (CI: 12.1%–18.7%). Among adults 65 and over, Medicare enrollment should theoretically be near-universal — but it isn't always, for several reasons specific to Indian Country:

• Some elders believe IHS is enough and don't realize that enrolling in Medicare Part B doesn't cost them anything if they're also Medicaid-eligible (the state pays the Part B premium for dual-eligible beneficiaries through Medicare Savings Programs).
• Enrollment complexity: If an elder missed their Initial Enrollment Period, late enrollment penalties apply — unless they had employer coverage or other qualifying coverage. IHS is not considered qualifying coverage for Medicare late enrollment penalty waiver purposes. This is a critical and confusing point.
• Language access: Medicare.gov and Social Security Administration materials are available in Spanish but not in Navajo (Diné bizaad) or Zuni (Shiwi'ma). For elders whose primary language is not English, navigating enrollment alone is not realistic.

What Is PRC and Why Does It Keep Running Out?

Purchased/Referred Care (formerly called Contract Health Services) is the IHS fund that pays for care that IHS facilities cannot provide. Think of it as IHS's referral budget. When a Navajo elder at Crownpoint Healthcare needs a colonoscopy and the facility can't perform one, PRC is supposed to authorize and fund the outside procedure.

Here is the problem, stated plainly: IHS has historically received between 56 and 60 cents for every dollar of healthcare need — based on IHS per-capita expenditure data compared to what Medicaid pays for comparable populations. PRC funding is the first thing that gets squeezed when IHS's overall appropriation comes in short of need. And it always comes in short.

In practical terms, this means PRC funds for many IHS service areas are exhausted before the federal fiscal year ends on September 30. An elder who needs a colonoscopy referral in August may be told that PRC funds are depleted and the referral must wait until October 1 — the new fiscal year. A colonoscopy that should have happened in August now happens in November, if the elder can get it scheduled at all.

For dual-eligible elders who have active Medicare Part B, there is a workaround: go directly to an outside provider who accepts Medicare, without waiting for PRC authorization, and bill Medicare directly. Medicare covers the preventive colonoscopy at 100% for average-risk beneficiaries. IHS will not be billed in this scenario, but the elder will have no out-of-pocket cost. This is legal and appropriate — and many elders don't know they can do it.

What Does the Dental Access Picture Look Like — and Why Does It Matter Here?

The colorectal cancer screening conversation is part of a larger prevention failure in McKinley County. CDC PLACES 2022 data shows that only 47.0% of adults visited a dentist or dental clinic in the past year (CI: 43.0%–50.9%). That number seems unrelated to colonoscopy scheduling, but it's not.

Dental access is a proxy for overall healthcare engagement. When less than half of adults are seeing a dentist annually — in a population with high rates of diabetes, where oral health is directly linked to systemic health — it tells you that our elders are not receiving comprehensive preventive care. They are in reactive mode, seeking care when something hurts rather than when a screening is due.

Medicare does not cover routine dental care. IHS dental services exist at Gallup Indian Medical Center and some satellite clinics, but wait times can extend months. This is another gap where the dual IHS/Medicare system offers no easy answer — and where community-based advocates, CHRs, and tribal health departments must fill the space.

Specific Action Steps for McKinley County Elders and Their Families

What's the Bottom Line for a Family Member Trying to Help?

If you're the son in Gallup, the granddaughter calling from Albuquerque, the niece who came home for spring ceremonies and noticed that grandma hasn't had a physical in two years — here is what I want you to leave with:

The dual IHS + Medicare system is real, it's legal, and it works better than either system alone. But it requires someone to actively navigate it. Our elders should not have to be their own case managers, but right now, that's often what the system demands.

The 40.7% colorectal cancer screening rate in McKinley County is not a personal failing of 68,797 people. It is the predictable result of a 2-star hospital being the primary acute care option, of PRC funds that run out before September, of Medicare plan networks that thin out dramatically in rural tribal areas, and of 38.2% of adults experiencing loneliness that keeps them from seeking care at all.

Here's what was promised: healthcare as a treaty obligation. Here's what was delivered: 40.7% screening rates, a 2-star hospital, and a PRC fund that runs dry. Here's the gap: 28 percentage points below the national benchmark, and counting.

Our elders built this country. They signed treaties. They are owed better than this — and knowing how the system works is the first step to demanding it.