My Medicare Advantage Plan Denied Dental Work Tied to My Treatment. Now What? The Rule the Plan Has to Follow

Short answer: your Medicare Advantage plan is required to cover at least what Original Medicare covers, under 42 CFR 422.101. If the dental work in question was tied to a covered medical treatment, an organ transplant, a heart valve procedure, cancer treatment, or dialysis, that obligation applies regardless of your plan's separate dental benefit or its annual cap. A denial that points to the dental benefit running out is answering the wrong question.

Most Medicare Advantage plans sell an extra dental benefit on top of what Original Medicare covers, cleanings, fillings, sometimes crowns, with its own network and a dollar limit that resets every year. That benefit and the coverage described in this article are not the same thing, and plans sometimes process a claim as if they were.

What does 42 CFR 422.101 actually require?

The regulation requires Medicare Advantage organizations to "provide coverage of, by furnishing, arranging for, or making payment for, all services that are covered by Part A and Part B" of Medicare. That is the floor. A Medicare Advantage plan cannot offer less than Original Medicare on anything Original Medicare covers, including the dental services tied to a covered medical treatment under 42 CFR 411.15(i)(3): exams and infection treatment before a transplant or heart valve surgery, care connected to head and neck cancer, extractions before radiation, jaw reconstruction after tumor removal, and dental exams before or during dialysis.

The plan also has to follow the same national coverage determinations, general Medicare coverage rules, and local contractor coverage decisions that apply under Original Medicare, unless a Medicare Advantage-specific rule says otherwise. There is no carve-out in the regulation for dental services. If Original Medicare would pay for the dental exam before your transplant, your Medicare Advantage plan owes the same thing.

What is the difference between the extra dental benefit and this coverage?

This is the distinction that gets lost in a lot of Medicare Advantage denials, and it is worth being precise about.

The extra dental benefit is optional. Plans are not required to offer it, and when they do, it usually covers routine care, cleanings, x-rays, fillings, sometimes dentures or crowns, through a specific network of dentists, up to an annual dollar maximum. Once that maximum is used, the plan can lawfully deny further claims under that benefit for the rest of the year.

Dental work tied to a covered medical treatment is not part of that extra benefit. CMS describes it directly: these are dental services that are "inextricably linked to, and substantially related and integral to the clinical success of" a covered medical service, and they fall under the plan's basic obligation to cover what Original Medicare covers. The dollar cap and the network requirement that govern the extra dental benefit have no bearing on this coverage.

What was denied	Which coverage applies	Can the plan cite the dental cap?
Routine cleaning, no medical treatment connection	The extra dental benefit, if the plan offers one	Yes, once the annual maximum is reached
Dental exam before an organ transplant	Basic benefit, required by 42 CFR 422.101	No
Infection treatment before heart valve surgery	Basic benefit, required by 42 CFR 422.101	No
Extractions before radiation for cancer	Basic benefit, required by 42 CFR 422.101	No
Dental exam before or during dialysis	Basic benefit, required by 42 CFR 422.101	No
Denture or implant after cancer treatment, no doctor referral tied to a listed scenario	Not covered under either category, generally	Not applicable

Why would a Medicare Advantage plan deny this kind of claim?

The most common reason is that the claim was processed by the wrong department, or against the wrong benefit, inside the plan. A dental claim that arrives without a clear note connecting it to a medical treatment looks, to a claims processor, exactly like a routine dental claim. It gets checked against the dental benefit's network and dollar limit, and if either one is a problem, it gets denied on that basis, even though the correct test was never applied.

The second most common reason mirrors Original Medicare: the referral connecting the treating physician to the dentist was never sent with the claim, so there is nothing in the file showing the link to a covered medical treatment. Without that paper trail, even a plan trying to apply the right rule cannot see the connection.

How do I get the plan to apply the right rule?

Start by reading the denial notice for the stated reason. If it cites your dental benefit maximum, your dental network, or "dental services not covered," that is the tell that the claim was processed as routine dental work rather than as coverage tied to your medical treatment.

In your appeal, or in a call to the plan before you appeal, state plainly which covered medical treatment the dental work was tied to, name it, and say that under 42 CFR 422.101 the plan is required to cover what Original Medicare covers regardless of the separate dental benefit. Attach the same documentation that would matter for an Original Medicare claim: the referral from the treating doctor asking for dental clearance, and the dentist's notes showing what was done and why.

What if the plan still denies it after that?

Medicare Advantage plans have their own internal appeal process, called reconsideration of an organization determination, and their own deadlines, printed on the denial notice. Those deadlines are not automatically the same as Original Medicare's 120-day redetermination window, so check the specific notice rather than assuming. If the plan upholds its own denial on reconsideration, 42 CFR 422.590 requires the plan to forward the case itself to an independent entity contracted by CMS for review, generally within 30 days for a service denial, without you having to file that next step yourself. The notice explaining the plan's reconsideration decision will describe what happens next.

Does my Medicare Advantage plan have to follow the same list of covered situations as Original Medicare?

Yes. The list at 42 CFR 411.15(i)(3), transplants, cardiac valve procedures, chemotherapy and CAR-T, head and neck cancer care, extractions before radiation, jaw reconstruction after a tumor, and dialysis, is a Medicare coverage rule, not an Original-Medicare-only rule. Because 42 CFR 422.101 requires the plan to cover what Part A and Part B cover, that same list applies to your Medicare Advantage plan. A plan cannot narrow the list or apply a stricter version of it just because you enrolled in Medicare Advantage instead of Original Medicare.

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

The requirement that Medicare Advantage plans cover at least what Original Medicare covers is drawn from 42 CFR 422.101. The distinction between the optional extra dental benefit and the dental services tied to a covered medical treatment is drawn from the CMS Medicare Dental Coverage page. The list of covered medical-treatment scenarios is drawn from 42 CFR 411.15(i)(3). 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.