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General reference information for lab, clinic and supply staff, not medical, dental or billing advice. Coverage and billing rules are set by each plan and practice.
Short answer
The dental code usually meant by “desensitizer” is CDT D9910, “Application of desensitizing medicament.” A related code, D9911, covers “Application of desensitizing resin for cervical and/or root surface, per tooth.” Both describe a service performed on a tooth, not a product: no CDT code identifies a particular desensitizer, and the products sold under that name carry separate FDA product codes.
Definition and scope
CDT (Current Dental Terminology) is the American Dental Association’s code set for dental procedures; it is a registered trademark of the ADA. The two descriptors above are quoted from the code table in UnitedHealthcare’s dental clinical policy DCP034.14, “Application of Desensitizing Medicaments and Resins” (effective November 1, 2025), which cites the ADA CDT Codebook 2025. For how CDT is maintained and where it sits in HIPAA code-set rules, see the CASRAI guide to Current Dental Terminology (CDT) codes.
That policy is one payer’s document, not the ADA’s, and it states that listing a code “does not imply that the service described by the code is a covered or non-covered health service”; coverage depends on the member’s plan document.
What the payer policy says about the FDA
The same policy notes that numerous in-office products have FDA clearance for reducing dental hypersensitivity and refers readers to the FDA 510(k) database to search by product name. It also states that FDA approval alone is not a basis for coverage.
D9910 and D9911 side by side
| Item | D9910 | D9911 |
|---|---|---|
| CDT descriptor (per UHC DCP034.14) | Application of desensitizing medicament | Application of desensitizing resin for cervical and/or root surface, per tooth |
| What the descriptor names | A medicament | A resin, with the cervical and/or root surface and “per tooth” in the descriptor |
Desensitizer products and FDA product codes
An FDA product code groups devices of one type and is linked to a regulation in 21 CFR Part 872. The openFDA device classification and 510(k) records show that products marketed as desensitizers were cleared under several different codes, so there is no one-to-one match with D9910 or D9911.
| FDA product code | Classification name | Class and regulation | A 510(k) record sold as a desensitizer |
|---|---|---|---|
| EJK | Liner, Cavity, Calcium Hydroxide | Class II, 21 CFR 872.3250 | K191103, Parkell Desensitizer Gel (Parkell, Inc.), decided 2019-11-22 |
| LBH | Varnish, Cavity | Class II, 21 CFR 872.3260 | K992629, D/SENSE II (Green-Or) Dentin Desensitizer (Centrix, Inc.), decided 1999-10-22 |
| KLE | Agent, Tooth Bonding, Resin | Class II, 21 CFR 872.3200 | K973185, HB-35 Desensitizer with Fluoride (American Dental Products, Inc.), decided 1997-11-14; K041680, Orajel Advanced Tooth Desensitizer (Del Pharmaceuticals, Inc.), decided 2004-11-10 |
| PHR | Diammine Silver Fluoride Dental Hypersensitivity Varnish | Class II, 21 CFR 872.3260 | FDA’s definition: “Applied to tooth enamel to block dentinal tubules for the purpose of reducing tooth sensitivity.” |
The regulation titles themselves are older device categories: 21 CFR 872.3260 is “Cavity varnish,” 872.3250 is “Calcium hydroxide cavity liner,” and 872.3200 is “Resin tooth bonding agent.” A product name or a code on a supplier page therefore tells you the device category FDA cleared it under, not the CDT code a practice reports. FDA classification is described in the CASRAI entries on the Medical Device Amendments of 1976 and the FDA.
What a supplier or product record can show
Used as a cross-walk, the three identifiers answer different questions:
- CDT code (D9910, D9911): the service reported to a plan. It is not printed on a product and does not name one.
- FDA product code and 510(k) number: the device category and the clearance a product was reviewed under. These can be checked in the FDA’s public databases.
- Catalog or SKU number: a seller’s own identifier, with no standing in either system.
The same three-way split applies to other dental items; the CASRAI guide to the collagen plug dental code works through it for a different product.
Common misunderstandings
“The code tells me which desensitizer to stock”
It does not. D9910 describes applying a medicament and D9911 a resin; the cleared products behind them sit under codes such as EJK, LBH, PHR and KLE, as shown above.
“D9910 and D9911 are interchangeable”
Their descriptors differ: one names a medicament, the other a resin for the cervical and/or root surface, per tooth. Which one a practice reports is a coding and documentation decision for that practice and the plan.
“A listed code means it is covered”
The policy states the opposite: a code listing carries no coverage meaning, and the member’s plan document decides.
FAQ
What is the dental code for a desensitizer?
CDT D9910, “Application of desensitizing medicament,” is the code usually meant. D9911 is the related code for desensitizing resin on the cervical and/or root surface, per tooth.
Does a CDT code identify a particular desensitizer product?
No. CDT codes describe a service. Products sold as desensitizers carry FDA product codes such as EJK, LBH, KLE and PHR, which classify the device type.
Which FDA product codes appear on desensitizer records?
The records above show EJK (calcium hydroxide cavity liner), LBH (cavity varnish) and KLE (resin tooth bonding agent), plus PHR, a code defined specifically for diammine silver fluoride dental hypersensitivity varnish.
Does listing D9910 or D9911 mean a plan covers it?
No. The UnitedHealthcare policy states that listing a code does not imply the service is covered or non-covered; the member’s plan document decides.
Is CDT an ADA product?
Yes. CDT is the American Dental Association’s code set, and CDT is a registered trademark of the ADA.
Sources
All sources checked November 2, 2026.
- UnitedHealthcare Dental Clinical Policy DCP034.14, “Application of Desensitizing Medicaments and Resins,” effective November 1, 2025: https://ams-gateway.uhcprovider.com/content/dam/provider/docs/public/policies/dental/application-medicaments-desensitizing-resins.pdf
- FDA openFDA device classification, product codes EJK, LBH, KLE, PHR: https://api.fda.gov/device/classification.json?search=product_code:PHR (and the same endpoint for EJK, LBH, KLE)
- FDA openFDA 510(k) records K191103, K992629, K973185, K041680: https://api.fda.gov/device/510k.json?search=device_name:desensitizer
- 21 CFR 872.3200, Resin tooth bonding agent: https://www.law.cornell.edu/cfr/text/21/872.3200
- 21 CFR 872.3250, Calcium hydroxide cavity liner: https://www.law.cornell.edu/cfr/text/21/872.3250
- 21 CFR 872.3260, Cavity varnish: https://www.law.cornell.edu/cfr/text/21/872.3260
