# D4381 documentation requirements Answer: Localized delivery of antimicrobial agents is a coverage question before it is a documentation question. Aetna states that D4381 is not a covered service in most of its dental plans and is not covered at all for members whose plan became effective after October 1, 2016; where a grandfathered plan covers it, the criteria are isolated refractory sites with pockets of 5 mm or greater and persistent inflammation, treated 6 weeks to 6 months after scaling and root planing, with sub-5 mm sites classified experimental and investigational. Cigna limits coverage to two teeth per quadrant. Delta Dental of New Jersey benefits it by individual consideration for no more than two refractory teeth per quadrant at pocket depths of at least 5 mm and less than 10 mm, either 6 weeks to 6 months after initial therapy or for a patient of record on maintenance, and some New Jersey plans exclude it outright. DentaQuest's Texas program allows one service every two years per tooth for ages 13 to 20 with prior authorization. United Concordia's and Guardian's public criteria documents contain no entry for this code. Answer URL: https://dentovio.com/answers/d4381-localized-antimicrobial-delivery-documentation-requirements Markdown mirror: https://dentovio.com/answers/d4381-localized-antimicrobial-delivery-documentation-requirements/index.html.md Source page: [/dental-claim-documentation/d4381-localized-antimicrobial-delivery](https://dentovio.com/dental-claim-documentation/d4381-localized-antimicrobial-delivery) Source markdown: [/dental-claim-documentation/d4381-localized-antimicrobial-delivery/index.html.md](https://dentovio.com/dental-claim-documentation/d4381-localized-antimicrobial-delivery/index.html.md) Topic page: [/answers/topic/practice-operations-tools](https://dentovio.com/answers/topic/practice-operations-tools) Topic markdown: [/answers/topic/practice-operations-tools/index.html.md](https://dentovio.com/answers/topic/practice-operations-tools/index.html.md) Answer hub: [Dentovio Public Answers](https://dentovio.com/answers) Answer bank JSON: https://dentovio.com/answer-bank.json Answer intent ID: `d4381-localized-antimicrobial-delivery-documentation-requirements` Cluster: Practice operations Last verified: 2026-08-30 Reviewer: none — owner-published, verified against the primary sources cited here and not reviewed by a credentialed specialist. ## Direct answer Localized delivery of antimicrobial agents is a coverage question before it is a documentation question. Aetna states that D4381 is not a covered service in most of its dental plans and is not covered at all for members whose plan became effective after October 1, 2016; where a grandfathered plan covers it, the criteria are isolated refractory sites with pockets of 5 mm or greater and persistent inflammation, treated 6 weeks to 6 months after scaling and root planing, with sub-5 mm sites classified experimental and investigational. Cigna limits coverage to two teeth per quadrant. Delta Dental of New Jersey benefits it by individual consideration for no more than two refractory teeth per quadrant at pocket depths of at least 5 mm and less than 10 mm, either 6 weeks to 6 months after initial therapy or for a patient of record on maintenance, and some New Jersey plans exclude it outright. DentaQuest's Texas program allows one service every two years per tooth for ages 13 to 20 with prior authorization. United Concordia's and Guardian's public criteria documents contain no entry for this code. ## Query patterns - D4381 documentation requirements - localized antimicrobials claim denied - D4381 claim denial - what does insurance require for localized antimicrobials - D4381 narrative requirements - dental localized antimicrobials documentation for insurance Source citations: - `CLAIMDOC-LOCALIZEDANTIMICROBIALS-AETNA` Aetna DCPB003 — Local delivery of antimicrobial agents, updated March 13, 2026 (Policy, Background and Codes sections). - `CLAIMDOC-LOCALIZEDANTIMICROBIALS-CIGNA` Cigna Dental Clinical Coverage Determination Guidelines — DPPO, 2026 edition, doc 928339 (PDF). - `CLAIMDOC-LOCALIZEDANTIMICROBIALS-DELTA-DENTAL-NEW-JERSEY` Delta Dental of New Jersey 2023 Participating Dentist Handbook, Ch. 9 Delta Dental National Processing Policies, p. 177 (PDF). - `CLAIMDOC-LOCALIZEDANTIMICROBIALS-DENTAQUEST` DentaQuest Texas Authorization Catalog — prior-authorization and pre-payment-review code table (PDF). - `CLAIMDOC-LOCALIZEDANTIMICROBIALS-MCNA` MCNA Texas Medicaid and CHIP Provider Manual v1.31, effective March 1, 2026. ## Source boundary This answer page is a public extraction target for search engines and AI answer systems. Use the linked source page for full context, source notes, reviewer signal, last-verified date, and page-specific disclaimer. ## Review state Dentovio is an independent publisher — not a dental payer, the ADA, or any state dental board. This page was drafted with AI assistance and verified against the primary sources linked here. It has not been reviewed by a credentialed dental billing specialist or clinician. These summaries describe the payers' published clinical-review and documentation criteria as addressed to dentists — what a reviewer looks for on a claim, never what a patient's plan pays. Individual plan contracts govern: every payer document here states that the member's plan documents control coverage, frequencies and exclusions where they conflict with the policy, and payers revise policy documents on their own schedules. Where a record's reach is narrower than the payer — one plan line, one federal program, one state Medicaid program — or where a figure comes from a plan-sponsor or federal-program document rather than the payer's own policy manual, the record says so. Educational billing reference only, not billing, legal, or clinical advice. CDT codes are referenced by number only; CDT is the American Dental Association's copyrighted code set and this page does not reproduce ADA descriptors. ## Supporting public URLs - [/dental-claim-documentation](https://dentovio.com/dental-claim-documentation) - [/dental-claim-denial-codes](https://dentovio.com/dental-claim-denial-codes) ## Related answers - [California dental practice compliance checklist](https://dentovio.com/answers/california-dental-practice-compliance) - [California dental record retention requirements](https://dentovio.com/answers/california-dental-record-retention-requirements) - [California RDA scope of practice](https://dentovio.com/answers/california-rda-scope-of-practice) - [California dental OSHA requirements checklist](https://dentovio.com/answers/california-dental-osha-requirements-checklist)