D1351 is the CDT code for a dental sealant, reported per tooth — a protective resin coating placed on the chewing surface of a tooth to seal the pits and fissures and help prevent decay. Because it is billed per tooth, multiple sealants at one visit are reported as separate D1351 lines.
Informational only — confirm the official CDT descriptor and your payers' rules independently. This is general guidance, not billing, coding, or clinical advice.
When to Use the D1351 Code
Report D1351 for the placement of a sealant on a previously unsealed, caries-free (or incipient) tooth, most often the permanent molars of children and teens, with one unit reported per tooth.
Use the right code for the situation. D1351 is the initial sealant placement; D1353 is a sealant repair on a previously sealed tooth, and replacing or repairing an existing sealant should not be billed as a new D1351 if the payer treats it as a repair. A sealant is also distinct from a preventive resin restoration or a filling — if the tooth has decay requiring removal of tooth structure, a restorative code applies, not D1351.
Documentation & Clinical Scenarios
Because D1351 is per tooth, the record must identify exactly which teeth were sealed:
- The specific tooth numbers sealed — each is a separate D1351 line.
- The tooth's condition — caries-free or incipient, supporting a preventive sealant rather than a restoration.
- The provider who placed the sealant(s).
- Other services the same day — the cleaning (D1110 or D1120), evaluation, or fluoride (D1206) — each under its own code.
Clear tooth-by-tooth documentation is what supports multiple sealant lines and protects against an audit.
Insurance & Billing Tips
- Verify age and tooth eligibility. Many plans cover sealants only on permanent molars and only up to a certain age (often the teen years); premolars or adult teeth may not be covered.
- List each tooth. D1351 is per tooth, so report a separate line per tooth with the correct tooth number; lumping them can cause denials.
- Watch the once-per-tooth rule. Most plans pay a sealant on a given tooth only once in a multi-year window; a re-seal may be denied or fall under repair (D1353).
- Don't confuse with restorations. A sealant on a decayed tooth is the wrong code — a restorative code applies if decay is removed.
- Read the EOB. If a tooth is denied for age or eligibility, the patient's record supports correcting or appealing the specific line.
Example Case
An 8-year-old established patient has two newly erupted permanent first molars that are caries-free with deep grooves. At the recall visit, after the cleaning, the dentist places sealants on both molars. The visit is coded D1120 for the child prophylaxis, the evaluation under its own code, and two separate D1351 lines — one for each sealed molar, with tooth numbers noted. Because the office confirmed the plan covered sealants on permanent molars for the patient's age, both sealant lines process cleanly.
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Frequently Asked Questions
What's the difference between D1351 and D1353?
D1351 is the initial placement of a sealant on a tooth, while D1353 is a sealant repair on a tooth that was previously sealed. If an existing sealant chips or partially fails, the work is usually reported as a repair under D1353 rather than a brand-new D1351. Billing a repair as a fresh placement can cause a denial, so check the tooth's sealant history before coding.
Is D1351 billed once for the whole mouth or per tooth?
Per tooth. D1351 represents a sealant on a single tooth, so sealing four molars at one visit is four separate D1351 lines, each with its own tooth number. Reporting them as a single unit can lead to denials or underpayment. The per-tooth structure also lets the plan apply its once-per-tooth frequency rule accurately, which is why exact tooth numbers matter on the claim.
How often and on which teeth will insurance cover sealants?
Coverage is commonly limited to permanent molars and to patients up to a certain age, often the teen years, with each tooth payable once within a multi-year window. Premolars and adult teeth are frequently excluded. A re-seal on a tooth already sealed may be denied or treated as a repair, so verifying the age, tooth, and frequency rules before placement avoids surprise out-of-pocket charges.
Does D1351 require pre-authorization?
A pre-authorization usually isn't required for routine sealants, but verifying eligibility — the covered teeth, the age limit, and any once-per-tooth frequency rule — is worthwhile before placement, especially for older patients or premolars where coverage is less certain. Confirming benefits up front, and noting each tooth's caries-free status in the chart, reduces denials and supports an appeal if a line is rejected.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.