Does Medicare Cover Dental Work? Only When It Is Tied to a Covered Medical Treatment. Here Are the Cases, in Medicare's Own Words.

Short answer: Medicare does not pay for dental work done for your teeth. It does pay for dental work done for your medical treatment. If a doctor needs your mouth cleared of infection before a transplant, heart valve surgery, chemotherapy, CAR-T, radiation, or dialysis, or if your jaw needs work because of a tumor or a fracture, Medicare can pay for the dental part. That is written into federal regulation at 42 CFR 411.15(i)(3), created by the CY 2023 Physician Fee Schedule rule and in force since January 1, 2023.

In 2024, only 1,100 providers in the whole country billed Medicare Part B for dental and oral surgery services, about $27.65 million in total, by our count of the CMS Medicare Physician and Other Practitioners by Provider file for 2024, provider types Dentist and Oral Surgery (Dentist only). Almost nobody uses it. Ask, and most front desks will tell you Medicare does not cover dental. For most of what they do, they are right. For the cases below, they are not.

Situation	What Medicare can pay for	In force since
Organ, stem cell, or bone marrow transplant	Dental exam and infection treatment before the transplant	January 1, 2023
Heart valve replacement or valvuloplasty	Dental exam and infection treatment before the procedure	January 1, 2023
Chemotherapy, CAR-T, or high-dose bone-modifying drugs for cancer	Dental exam and infection treatment before treatment starts	January 1, 2024
Head and neck cancer (radiation, chemo, surgery)	Exam and infection treatment before or during care; treatment of dental complications after care	January 1, 2023 (complications language is in the current rule text)
Radiation to the jaw for cancer	Extractions to prepare the jaw	January 1, 2023
Tumor removed from the jaw	Rebuilding the dental ridge, at the same time as the tumor surgery	January 1, 2023
Broken jaw or dislocated jaw joint	Stabilizing teeth to set the fracture; dental splints as part of covered treatment	January 1, 2023
Dialysis for end-stage renal disease	Dental exam and infection treatment before or during dialysis	January 1, 2025

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

The regulation starts with the exclusion everyone knows: Medicare does not cover "dental services in connection with the care, treatment, filling, removal, or replacement of teeth, or structures directly supporting the teeth." A cleaning is excluded. A filling is excluded. A denture is excluded.

Then it says the exclusion does not apply to dental services that are "inextricably linked to, and substantially related and integral to the clinical success of" a covered medical service. That sentence is the whole door. The dental work is not being paid for as dental work. It is being paid for as a necessary step in a medical treatment Medicare already covers. The regulation then lists the situations it has in mind, and it introduces that list with the words "include, but are not limited to." The list is the safe ground. What sits just outside it can still be argued, with a doctor's letter.

Which medical treatments qualify for Medicare dental coverage?

Here is what the regulation lists, translated from the legal text and checked against the CMS coverage page.

Before an organ, stem cell, or bone marrow transplant. A dental or oral exam, and treatment to get rid of infection, before the transplant.

Before heart valve replacement or valvuloplasty. The same exam and infection treatment, so the surgery is not compromised by an infected mouth.

Before chemotherapy, CAR-T cell therapy, or high-dose bone-modifying drugs for cancer. The exam and infection treatment before treatment starts. Bone-modifying drugs are medicines like zoledronic acid or denosumab given at cancer doses. These were added by the CY 2024 rule.

Head and neck cancer. A dental or oral exam and infection treatment as part of the workup before, or at the same time as, radiation, chemotherapy, or surgery for head and neck cancer. Treatment for dental complications that come up after the cancer care can qualify here too.

Extractions to prepare the jaw for radiation. When teeth have to come out before radiation for cancer, the extractions are covered.

Rebuilding the dental ridge after a tumor. Reconstruction of the dental ridge when it is done because of, and at the same time as, surgery to remove a tumor.

Jaw fracture and jaw joint. Stabilizing or immobilizing teeth as part of setting a broken jaw. Dental splints when they are part of covered treatment for a medical condition such as a dislocated jaw joint.

Dialysis for end-stage renal disease. Since January 1, 2025, under the CY 2025 rule, a dental or oral exam and infection treatment before, or at the same time as, dialysis.

The services that come with covered dental work are covered too. Anesthesia, x-rays, and the operating room, when they are furnished as part of a covered dental service, are not excluded. On a surgical bill, those are often a large share of what you paid.

What dental work is Medicare still not covering?

Having cancer or kidney disease does not turn every dental bill into a medical one. The link has to run from the dental work to the medical treatment, not from the diagnosis alone:

• Cleanings, fillings, and crowns done at the same visit as a covered exam are still excluded unless they are the infection treatment the doctor asked for.
• Dentures and implants to restore chewing after cancer treatment are not on the list. The one reconstruction Medicare names is ridge reconstruction done at the same time the tumor is removed.
• Dental work done months after the medical treatment, with no doctor asking for it, is routine dental work.

If your situation sits between the lines, the regulation's own words, "include, but are not limited to," mean it can be argued. It has to be argued with a doctor's letter, not a hope.

Why do these Medicare dental claims get denied?

We have read a lot of these denials. When a claim in this category fails, it is almost never because the patient did not qualify. On a Medicare Summary Notice it usually shows up as a line saying the service is not covered, with no mention of your transplant or your cancer anywhere on the page. That is the tell. The claim went in as dental. Underneath, it is one of these three.

1. The doctor and the dentist have to be connected on paper. Medicare requires documented coordination between the doctor treating the medical condition and the dentist. A referral letter, a note in the chart that the cardiologist requested dental clearance, records sent from one office to the other. Without that paper trail, the dental work looks like dental work.

2. The claim has to carry the KX modifier and a diagnosis code. Since July 1, 2025, a dental claim in this category must include the KX modifier, which is the dentist's certification that the documentation supports the link, and an ICD-10 diagnosis code for the medical condition. A claim filed without them is filed wrong, no matter how clearly you qualified. You can ask the office one question: "Was it billed with the KX modifier and a diagnosis code?"

3. The dentist has to be enrolled in Medicare. CMS says it plainly: a provider must be enrolled in Medicare to bill and be paid for covered dental services. Most dentists have never enrolled, because for most of their work there was no reason to. If your dentist is not enrolled, the office cannot bill Medicare, and a claim you file yourself will generally not be paid either. Ask before the work if you can. If the answer is no, an oral surgeon or a hospital dental service that is enrolled may be able to do the same work.

How do I get Medicare to cover dental work before treatment?

If you are facing one of the treatments above and your doctor has told you to see a dentist first, this is the order that gets it paid.

1. Ask your doctor's office for a written referral to the dentist that names the treatment you are having and says the dental clearance is needed for it. One paragraph is enough.
2. Ask the dental office two questions: "Are you enrolled in Medicare?" and "Will you bill this to Medicare with the KX modifier and my diagnosis code?" If they say Medicare does not cover dental, you can say: "It covers dental care that is inextricably linked to a covered medical treatment, under 42 CFR 411.15(i)(3). I have a referral from my doctor."
3. Keep copies of the referral, the dental notes, and the itemized bill in one folder. That folder is your claim.

Can I still get paid back if I already paid, or was already denied?

If the work is done and you paid cash, you can still file. Medicare's Patient Request for Medical Payment, form CMS-1490S, lets you send the itemized bill and the dentist's notes to your Medicare contractor yourself. Attach the doctor's referral. The dentist generally still has to be enrolled for the claim to pay.

If Medicare denied the claim, you have the right to a redetermination. Under Original Medicare the deadline is 120 days from the date on your Medicare Summary Notice. Under a Medicare Advantage plan, the deadline is printed on the denial notice; do not assume it is the same. In the appeal, say which of the listed situations applies to you, attach the referral that connects the dentist to the doctor, and, if the claim went in without the KX modifier or a diagnosis code, ask the dentist's office to correct the claim. Many denials in this category are paperwork denials, and paperwork can be fixed.

Does Medicare Advantage cover this dental work too?

Yes. A Medicare Advantage plan has to cover at least what Original Medicare covers (42 CFR 422.101), so the linked dental services above apply to you too. Many Advantage plans also add routine dental as an extra benefit. Those are two different things: the extra benefit has its own network and limits, and the linked dental services are a Medicare coverage rule that the plan cannot deny just because the dental benefit is used up. If the plan denies linked dental work as "not a covered dental benefit," that is the wrong test, and it is worth saying so in the appeal.

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 the regulation itself, 42 CFR 411.15(i)(3), and from the CMS Medicare Dental Coverage page, which lists the scenarios and the KX modifier and diagnosis-code dates. The rule was created in the CY 2023 Physician Fee Schedule final rule (CMS-1770-F, effective January 1, 2023). The CY 2024 rule (CMS-1784-F) added chemotherapy, CAR-T, and high-dose bone-modifying agents. The CY 2025 rule (CMS-1807-F) added dialysis for end-stage renal disease. The count of providers who billed Medicare in 2024 is our own tally of the CMS Medicare Physician and Other Practitioners by Provider file for 2024 (R26 P05 V10 D24, filed May 2026), provider types Dentist and Oral Surgery (Dentist only), queried September 2, 2026; amounts are Medicare-paid, not submitted charges. 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.