15 Sep Medicare Dental Coverage After HNC

September 15, 2026 ~ This blog was originally published by the Head & Neck Cancer Alliance and provides important information about Medicare coverage for dental care related to head and neck cancer treatment. To learn more about managing dental care before, during, and after head and neck cancer treatment, register for their free webinar on September 23 at 7 p.m. ET. 

Radiation to the head and neck reduces saliva (dry mouth), which sharply raises the risk of rapid tooth decay, gum infection, and a serious bone complication called osteoradionecrosis (areas of jawbone that lose their blood supply and do not heal). Dental problems including decay and jaw osteoradionecrosis affect roughly 10–18% of patients after radiation.

Because of this, having teeth checked and problem teeth treated (sometimes removed) before radiation, and keeping up close dental follow-up after, is a recommended part of cancer care — not optional cosmetic dentistry. In January 2024, Medicare opened a new path to payment for certain dental services tied to head and neck cancer treatment. The change was important. For the first time, Medicare policy clearly included medically necessary care to address dental or oral complications after treatment with radiation, chemotherapy, surgery, or a combination of these treatments.

More than two years later, the promise of that change has not fully reached patients.

At the Head & Neck Cancer Alliance, we hear versions of the same story almost every week. A survivor learns about the policy only after paying thousands of dollars out of pocket. A dental office says it cannot bill Medicare. A patient spends hours on the phone without getting a clear answer. Medical and dental records sit in separate systems. No one is sure who is supposed to connect them.

The problem is no longer only whether Medicare policy allows payment. It is whether survivors and providers can find and use the pathway that CMS created.

What the Rule Does and Does Not Do

The 2024 policy did not create a general Medicare dental benefit. Most routine dental care is still excluded. See our 2025 blog post for specific language on the changes.

Instead, Medicare may pay for certain dental services that are considered closely connected to the success of another Medicare-covered medical service. This includes medically necessary diagnostic and treatment services to address dental or oral complications before or after Medicare-covered head and neck cancer treatment.

That distinction matters. A history of head and neck cancer treatment does not automatically make every later dental service eligible. Medicare or the Medicare Advantage plan still reviews the specific service, why it is needed, how it relates to the covered cancer treatment, and whether the claim meets its requirements. Coverage is never guaranteed.

Where Survivors are Getting Stuck

The questions reaching HNCA point to several gaps:

• People do not know the policy exists. Many survivors learn about it only after dental work has been completed and paid for.
• Dental offices may not know how to use it. A provider may not be enrolled in Medicare or may be unfamiliar with submitting dental services under your medical coverage instead of dental coverage.
• Medical and dental care remain disconnected. Medicare expects coordination, but survivors are often left to collect records and connect the two teams themselves.
• It can be difficult to get an answer before treatment. Medicare Advantage plans may use prior authorization, but Original Medicare does not offer a general advance guarantee of payment for this care.
• Patients carry the administrative burden. They may need to gather records, track down billing information, submit a claim, or appeal a denial while also managing urgent dental needs.

CMS made an important change in 2024. Now the process needs to catch up with the policy.

What Survivors Can Do Now

Until the process becomes easier, preparation matters. The following checklist cannot guarantee coverage, but it can help give Medicare or a Medicare Advantage plan the information needed to review a request.

Medicare Dental Coverage Checklist

Before you call Medicare or your plan

• Find out whether you have Original Medicare or a Medicare Advantage plan.
• Write down the name of your plan and your member number.
• Gather the dates and types of your cancer treatment, including surgery, radiation, and chemotherapy.
• Ask your dental provider for the name of the planned procedure, the teeth involved, and an estimate of the cost.
• Ask how soon the dental work is needed and whether it is medically safe to wait while you check coverage.

Ask your cancer team for

• A treatment summary or clinic notes showing your cancer diagnosis and treatment.
• Notes showing that dental or oral problems were discussed during follow-up care.
• A letter or note explaining whether the current dental problem may be a complication of your cancer treatment.
• An explanation of why the proposed dental care is important to your medical care, when your team can provide one.
• Direct communication with the dental provider. This may be a referral, consultation note, letter, or documented phone call.

Ask your dental provider for

• A written treatment plan.
• An itemized estimate or bill with the date, service, tooth number, and charge for each item.
• Dental records and X-rays related to the problem.
• A note explaining the dental condition, the recommended treatment, and why it is needed.
• The dentist’s name, address, and National Provider Identifier, or NPI.
• Confirmation that the dentist is enrolled in Medicare or participates in your Medicare Advantage plan.
• Confirmation that the office will submit the claim through your medical coverage instead of dental coverage, if appropriate.

When you call Medicare or your plan

• Ask whether the proposed service may be reviewed under the medical benefit as care connected to prior head and neck cancer treatment.
• Ask whether prior authorization or a referral is required.
• Ask whether the dentist must be enrolled in Medicare or in the plan’s network.
• Ask what records or forms are required and who must submit them.
• Write down the date, the representative’s name, and the call reference number.
• Ask for the answer in writing when possible.

If the dental work has already been completed

• Check the date of service. Medicare claims generally must be filed within 12 months.
• Ask the dental provider to submit the claim first.
• Gather itemized bills, receipts, dental records, and cancer-treatment records.
• If the provider will not file and you have Original Medicare, ask Medicare whether Form CMS-1490S applies to your situation.
• If you have Medicare Advantage, ask the plan how to submit a claim for care you already received.

If the claim is denied

• Read the denial notice and find the reason for the decision.
• Find the appeal deadline and instructions on the notice.
• Ask the dental provider and cancer team for records that address the reason for denial.
• Keep copies of the appeal and everything you submit.
• Contact Triage Cancer or your local State Health Insurance Assistance Program, or SHIP, if you need help understanding the next step.

A Few Things to Note

Your type of coverage changes the process

With any insurance, don’t assume “dental” automatically means “dental benefit.” Ask whether the medical connection changes how the service should be reviewed.

With Original Medicare, Medicare processes the claim. Original Medicare usually does not require prior authorization for these dental services, and it does not give a general advance guarantee that a claim will be paid. The dental provider must be able to submit the service to Medicare correctly.

With a Medicare Advantage plan, a private insurance company manages your Medicare benefits. The plan may have its own provider network, referral rules, and prior authorization process. It may also offer extra dental benefits that Original Medicare does not provide.

If you are unsure which type you have, look at the card you use for medical appointments or call the number on the card.

If you also have Medicaid, check that coverage too. People who have both Medicare and Medicaid may have access to dental services through their state Medicaid program that Medicare does not cover. Adult dental benefits vary by state, so ask your Medicaid plan or state Medicaid program what services are available and how the two types of coverage work together.

If you have insurance through an employer or another health plan in addition to Medicare, check that coverage as well. Ask whether the dental service may be considered under the plan’s medical benefit because it is medically necessary and connected to your cancer treatment or its complications. Coverage rules differ by plan, so also ask which insurance should be billed first and what documentation the plan requires.

Coordination matters

Medicare expects the medical and dental providers to coordinate care. A note that only says you had radiation in the past may not give the reviewer enough information. The records should help explain the cancer treatment, the current dental or oral problem, why the proposed care is needed, and how the two may be connected.

A dentist must generally be enrolled in Medicare to bill Original Medicare for a covered dental service. If you have Medicare Advantage, the plan may also require you to use an in-network provider.

If a provider believes Original Medicare may not pay, you may receive an Advance Beneficiary Notice of Noncoverage, or ABN. It explains why the provider expects a denial and what you may have to pay. An ABN is not an approval or denial.

A question you can use

You can use this question when calling your plan or speaking with a provider:

“I need dental treatment for a problem that may be connected to prior head and neck cancer treatment. What process should my dental provider and cancer team follow to request coverage under my medical benefit?”

If the care has already happened

Start by asking whether the dental provider can submit the claim. Medicare claims generally must be filed within 12 months of the date of service, so timing matters.

If a provider does not file the claim, people with Original Medicare may be able to use Form CMS-1490S, Patient’s Request for Medical Payment. The form is not a shortcut to coverage. Medicare will still review whether the service qualifies, whether the provider and claim meet Medicare requirements, and whether the claim was filed on time.

If you have Medicare Advantage, contact the plan for its claim-submission process instead of assuming the CMS-1490S form applies.

If the claim is denied

A denial is not always the end of the process. You have the right to appeal a Medicare coverage or payment decision.

Read the denial notice carefully. It will tell you why the claim was denied, the deadline to appeal, and where to send the appeal. Ask your cancer team and dental provider for records or a letter that directly addresses the reason for the denial. Follow the instructions and deadline on your notice.

Where to Get Individual Help

Medicare dental claims can be complicated and are decided case by case. The Head & Neck Cancer Alliance cannot determine whether a particular service will be covered, but these organizations may help you understand your options:

• Medicare: Call 1-800-MEDICARE (1-800-633-4227) or visit Medicare.gov.
• State Health Insurance Assistance Program: SHIP offers free, one-on-one Medicare counseling. Find your local program at SHIPHelp.org or call 1-877-839-2675.
• Triage Cancer: Its free Legal & Financial Navigation Program provides one-on-one help with cancer-related legal and financial concerns, including Medicare. Visit TriageCancer.org.
• Your members of Congress: If you have tried the usual Medicare channels and are having difficulty getting an answer or resolving a problem, the constituent-services staff in your U.S. representative’s or senators’ offices may be able to make an inquiry with Medicare or CMS on your behalf. They cannot require Medicare to cover a service or overturn its rules, but they may be able to help when a case is stalled or difficult to navigate.

One Final Reminder

Do not delay urgent dental care while trying to resolve an insurance question. Ask your dental provider and cancer team how soon treatment is needed and whether it is medically safe to wait.

Coverage is not guaranteed, but early coordination, clear records, and correct claim submission can help Medicare or your plan review the request using the right information.

Sources and Editorial Notes

Information reviewed September 2026. Coverage decisions are case specific, and Medicare policies may change.

• Centers for Medicare & Medicaid Services. Medicare Dental Coverage
• Centers for Medicare & Medicaid Services. Calendar Year 2024 Medicare Physician Fee Schedule Final Rule
• Medicare.gov. Dental service coverage
• Medicare.gov. Compare Original Medicare and Medicare Advantage
• Medicare.gov. Filing a claim
• Medicare.gov. Filing an appeal
• Medicare.gov. Your protections: Advance Beneficiary Notice of Noncoverage
• SHIP National Technical Assistance Center. About SHIPs
• Triage Cancer. Medicare & Cancer

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