A Medicare card doesn’t turn every dental claim into a covered medical claim. If only billing worked that way.
The July 2025 changes matter for practices providing dental services closely connected to covered medical treatment. But before your team reaches for a diagnosis code, there’s a more useful question: does this service meet Medicare’s coverage requirements in the first place?
Start with coverage
Medical connection.
Specific requirements.
Original Medicare generally excludes routine dental care. It can cover certain dental services when they are inextricably linked to the clinical success of another Medicare-covered service. That is a specific coverage standard, not a general statement that oral health affects overall health.
CMS examples include certain dental examinations and treatment to eliminate oral infection connected to an organ transplant, cardiac valve replacement or valvuloplasty, particular cancer treatments, and dialysis for end-stage renal disease. Each example has its own conditions and timing requirements.
A patient’s diagnosis alone does not make every dental procedure covered. The clinical connection, necessary services, documentation, and applicable requirements still have to line up.
One more distinction: some Medicare Advantage plans offer additional dental benefits. Check that plan’s coverage and billing instructions separately. A routine dental benefit and a medical-linked Medicare claim are different questions.
Required from July 1, 2025
Two additions.
Two different jobs.
Neither replaces the procedure code or the supporting record.
ICD-10
The diagnosis information.
CMS requires an ICD-10 diagnosis code on dental claims submitted using the 837D transaction or 2024 ADA claim form. Select the appropriate code from the clinical documentation and the code set valid for the date of service.
KX
The supported medical link.
The KX modifier identifies dental services inextricably linked to covered medical services. It indicates that the record supports medical necessity and the connection, and that the medical and dental practitioners coordinated care.
See CMS dental billing instructions and the KX implementation transmittal. Do not add KX simply because a patient has Medicare.
Connect the care
The conversation belongs in the record.
“We spoke with the medical office” is a useful start. The record also needs to support what that coordination established.
CMS requires documented evidence of information exchange or integration between the medical and dental providers. A referral or an exchange of information can be part of that coordination. Without documented support for it, Medicare will not cover and pay for these dental services.
Give the process an owner: who contacts the medical team, who records the information, and who checks that the documentation supports the claim? Otherwise, everyone can assume someone else has it. A surprisingly efficient way for nobody to have it.
Before you submit
A little preparation.
Fewer loose ends.
Confirm the billing setup.
Check the provider’s Medicare enrollment, billing approval, and submission route with the Medicare Administrative Contractor, or MAC. A familiar dental claim form does not mean the office is ready to bill Medicare.
Match the claim to the record.
Check the procedure, diagnosis, applicable modifiers, and documented coordination together. Resolve questions with the treating providers and your MAC rather than guessing at a code to make the claim go through.
Keep documentation ready.
CMS says not to send attachments such as X-rays or periodontal charting with the claim. Keep the supporting record available; the MAC will request additional information in writing if needed.
Get the right people talking.
The useful takeaway is bigger than adding another field to a claim. Coverage, clinical documentation, and billing need to tell the same story.
For Medicare-specific claim decisions, start with current CMS guidance and your MAC. If this raises broader questions about how your practice manages dental insurance billing and follow-up, we’re happy to have that conversation too. Clear responsibilities make everyone’s day a little easier.
Read the sources.
- CMS: Medicare dental coverage, coordination, enrollment, and claim instructions
- CMS: KX modifier implementation, Transmittal R13096OTN
- CMS: current ICD-10 code files and effective dates
Originally published May 19, 2025. Revised and sources reviewed October 18, 2026. Educational billing information; verify requirements for the specific service and claim. Illustrative photographs do not establish anyone’s coverage or treatment.