Does Medicare Cover Dental Exams for Dialysis Patients? Yes, Since January 1, 2025. Here Is the Rule.

Short answer: yes. Since January 1, 2025, Medicare covers a dental or oral exam, and treatment to eliminate infection, before dialysis starts or at the same time you are receiving it, for end-stage renal disease. That is written into 42 CFR 411.15(i)(3)(F), added by the CY 2025 Physician Fee Schedule final rule, CMS-1807-F. It is the newest addition to a regulation that already covered dental clearance before organ transplants, heart valve surgery, and several cancer treatments.

Most dental offices have no reason to know this yet. It only took effect in the last two years, and the rule sits inside a Medicare regulation, not a dental one. If you are on dialysis and a front desk tells you Medicare does not cover dental exams, ask them to check 42 CFR 411.15(i)(3)(F) before you accept that answer.

What does 42 CFR 411.15(i)(3)(F) actually say?

The subparagraph covers a "dental or oral examination performed as part of a comprehensive workup prior to, or contemporaneously with, Medicare-covered dialysis services when used in the treatment of end stage renal disease (ESRD); and medically necessary diagnostic and treatment services to eliminate an oral or dental infection prior to, or contemporaneously with, Medicare-covered dialysis services when used in the treatment of ESRD."

Two things are covered by that sentence. The exam itself, done as a workup before or during dialysis, and the treatment needed to clear an infection the exam finds, on the same timeline. It is a narrower grant than a general dental benefit. It follows the dialysis treatment, not the ESRD diagnosis by itself.

Why did CMS add dialysis to this rule in 2025?

The regulation started in 2023 covering transplants and heart valve surgery, then added chemotherapy, CAR-T, and high-dose bone-modifying cancer drugs in 2024. Dialysis and end-stage renal disease came a year later, in the CY 2025 Physician Fee Schedule final rule, effective January 1, 2025. CMS said commenters had submitted clinical evidence describing the links between dental and oral health and dialysis outcomes for ESRD patients, and the agency finalized coverage on that basis.

Dialysis patients carry elevated infection risk in general, and an untreated oral infection is not an isolated problem for someone receiving dialysis. The rule follows that clinical reality: an exam and infection treatment tied to the dialysis care is now billable to Medicare, where before 2025 it was excluded dental work regardless of the ESRD diagnosis.

What exactly is covered for dialysis patients, and what is not?

What Medicare covers	What Medicare does not cover
The dental or oral exam as a workup before dialysis starts	A cleaning done at the same visit, unless it is the infection treatment ordered
The same exam done contemporaneously with ongoing dialysis	Fillings, crowns, dentures, or implants, even for a dialysis patient
Treatment to eliminate an active oral or dental infection tied to the dialysis timeline	Dental work with no documented connection to the dialysis treatment
Anesthesia, x-rays, and OR time furnished as part of the covered dental service	Ongoing routine dental care for the duration of dialysis treatment

The test is the same one that governs every subparagraph of this regulation: is the dental work tied to the covered medical service, here dialysis, or is it separate dental care that happens to belong to a patient who is also on dialysis. Only the first is covered.

Why do these claims get denied even when the patient is actively on dialysis?

We read a lot of these denials. Being on dialysis, by itself, does not get a dental claim paid. Three reasons account for nearly all the denials we have seen in this category.

The claim was filed as ordinary dental work. If the dentist's office bills the exam without noting the connection to dialysis, the Medicare Summary Notice will show a routine dental denial, with no reference to your dialysis treatment anywhere on the page.

The nephrology connection was never documented. Medicare requires documented coordination between the physician managing your dialysis and the dentist. A referral or chart note showing the nephrology team requested the exam is what ties the claim to the covered service. Without it, the exam looks unconnected, even if it happened the same week as a dialysis session.

The KX modifier and diagnosis code are missing. Since July 1, 2025, a dental claim in this category must carry the KX modifier and an ICD-10 diagnosis code identifying the end-stage renal disease. A claim submitted without both is filed incorrectly, regardless of whether the exam itself qualified.

How do I get this covered before or during dialysis?

If you are starting dialysis, or already receiving it, and want the dental exam covered, do this in order.

1. Ask your nephrology office for a short written referral stating that a dental or oral exam is needed before, or during, your dialysis treatment for end-stage renal disease.
2. Ask the dental office directly: "Are you enrolled in Medicare, and will you bill this with the KX modifier and my diagnosis code?" A dentist who is not enrolled in Medicare cannot bill Medicare for this exam.
3. Keep the referral, the dental notes, and the itemized bill together. If the claim is denied, that folder is your appeal.

What if I already paid, or the claim was already denied?

You can still be paid back. Medicare's Patient Request for Medical Payment, form CMS-1490S, lets you submit the itemized bill and the dentist's notes yourself, with the nephrology referral attached, to your Medicare contractor. The dentist generally still needs to be enrolled in Medicare for the claim to pay.

If the claim was denied, you have the right to a redetermination under Original Medicare, within 120 days of the date on your Medicare Summary Notice. Name the subparagraph that applies, dialysis for end-stage renal disease under 42 CFR 411.15(i)(3)(F), attach the nephrology referral, and ask the dental office to correct the claim if it went in without the KX modifier or a diagnosis code. Because this rule only took effect January 1, 2025, many offices have simply never billed it, and the fix on appeal is often just getting the claim filed correctly.

A note on who we are

CheckMyDenial helps patients read and appeal insurance denials. We are related to a company that does medical-dental billing and reimbursement for patients and practices, and if you ever move from reading to having someone handle a claim for you, that relationship and any fee are disclosed before anything is paid. This page is free, it does not require anything from you, and it will stay that way.

Where this comes from

Everything above is drawn from 42 CFR 411.15(i)(3)(F) and from the CMS Medicare Dental Coverage page, which lists the scenarios and the KX modifier and diagnosis-code dates. Dialysis for end-stage renal disease was added to the rule by the CY 2025 Physician Fee Schedule final rule, CMS-1807-F, effective January 1, 2025. Links are listed at the end of this page. If you find something here that is out of date, tell us and we will fix it and change the date at the top.