CurrentAnthemPolicy 04-206

Dental Clinical Policy

Policy defines clinical indications, general coverage criteria, coding guidance, and billing inclusivity rules for clinical crown lengthening (CDT D4249) for dental plan review of medical/dental necessity.

Policy Summary

PayerAnthem

PolicyDental Clinical Policy

Policy CodePolicy 04-206

Change TypeRevised (Annual Review)

Effective DateJan 1, 2023

Next Review Date

Key ActionSubmit a current (within 12 months), dated, diagnostic, pretreatment radiograph documenting < 3 mm of sound natural tooth structure between the restorative margin and the alveolar crest; additional records may be requested and allow a minimum of 6 weeks healing before final restoration.

SourceLink

POLICY UPDATE CHANGES

Policy status marked Revised with last review 10/26/2022 and publish date 01/01/2023 (Annual Review).

1Primary CDT code cited

9Clinical/general criteria points

3Explicit exclusions listed

Coverage Summary

Subject: Clinical Crown Lengthening; Policy Number: 04-206. This policy (effective 2023-01-01, last reviewed 2022-10-26) provides guidance on medical/dental necessity and benefit review for clinical crown lengthening. Coverage stance: mixed — the procedure is covered when specified clinical and documentation criteria are met but may be excluded or considered elective depending on contract language and clinical circumstances.

Clinical Indications and General Criteria

Clinical Indications / General Criteria

Covered when ALL of the following are met:

ALL of the following

Procedure is necessary and appropriate in a healthy periodontal environment to allow a restorative procedure on a tooth with little or no tooth structure exposed to the oral cavity.
A current (within 12 months), dated, diagnostic, pretreatment radiograph documents less than three millimeters of sound natural tooth structure between the restorative margin and the alveolar crest.< 3 millimeters; radiograph within 12 months
If indications are not evident by radiographic examination, additional patient records may be requested documenting the need for treatment.
operational; documentation may be requested
Procedure may only be performed in a periodontally healthy environment.
Prior to final restoration of a tooth, a minimum of 6 weeks must be allowed for healing of bone and soft tissue following clinical crown lengthening.>= 6 weeks healing prior to final restoration
Procedure requires reflection of a full thickness flap and removal of hard (osseous) tissue as well as soft (gingival) tissue and requires an alteration of crown-root ratio.
If resulting bone removal results in an inadequate crown-to-root ratio, the procedure is not beneficial and is excluded.
Clinical crown lengthening will be considered only when subgingival caries or fracture requires removal of soft and hard tissue to enable restoration of a tooth.
Clinical crown lengthening will be considered for treatment of natural teeth only (no implants/prosthetics).
Periodontal charting may be required.
documentation requirement

Not covered when ANY of the following apply

Performed to correct congenital or developmental defects (considered elective).
elective — not allowed
Performed for cosmetic reasons.
cosmetic — not allowed
Performed for treatment of teeth with structural loss due to wear, erosion, attrition, abrasion and abfraction.
excluded indications
When the resulting bone removal produces an inadequate crown-to-root ratio compromising long-term prognosis.
exclusion based on prognostic assessment

Bundling / inclusivity rules

When performed in conjunction with osseous surgery for periodontal disease, the crown lengthening procedure is inclusive with osseous surgery.
Mesial/distal wedge procedure (D4274) performed in conjunction with D4249 on same date of service is considered inclusive (D4274 is inclusive).
'Troughing' of the soft tissue as part of crown preparation, or to visualize margins for impressions, does not meet the CDT descriptor for D4249; D4249 is considered inclusive with the crown.

Provider Actions

Documentation Required

Submit diagnostic radiograph

Submit a current (within 12 months), dated, diagnostic, pretreatment radiograph documenting less than three millimeters of sound natural tooth structure between the restorative margin and the alveolar crest. Additional records may be requested if radiographs are inconclusive.

Affected code(s): D4249
Radiograph recency: within 12 months
Documented threshold: < 3 millimeters between restorative margin and alveolar crest

Documentation Required

Allow healing interval

Allow a minimum healing interval of six weeks after clinical crown lengthening before placement of the final restoration to permit bone and soft tissue healing.

Healing interval: >= 6 weeks

Billing Rule

Inclusive billing of adjunct procedures

Certain adjunct procedures are considered inclusive when performed with clinical crown lengthening (D4249). Mesial/distal wedge (D4274) and 'troughing' for crown preparation are considered inclusive with D4249 when done on the same date of service. Crown lengthening performed in conjunction with osseous surgery for periodontal disease is also inclusive with the osseous surgery.

Affected codes: D4249
Related inclusive code: D4274
Note: inclusive procedures must be on same date of service

Denial Risk

Exclusion criteria may lead to denial

Claims may be denied when the procedure is performed for elective or cosmetic reasons (including correction of congenital or developmental defects), when performed for structural tooth loss due to wear/erosion/attrition/abrasion/abfraction, or when resulting bone removal produces an inadequate crown-to-root ratio compromising long-term prognosis.

Elective/cosmetic procedures are excluded
Excluded for structural tooth loss from wear/erosion/attrition/abrasion/abfraction
Excluded when crown-to-root ratio is inadequate

Documentation Required

Periodontal status documentation

Procedure may only be approved in a periodontally healthy environment; periodontal charting and other periodontal documentation may be requested to support approval.

Periodontal environment must be healthy
Periodontal charting may be required

Background and Evidence

This policy provides guidance for determining the medical/dental necessity of clinical crown lengthening and notes that member contract language governs coverage decisions; federal/state law and contract language take precedence. It requires supporting diagnostic documentation — specifically a current (within 12 months), dated, diagnostic, pretreatment radiograph showing < 3 millimeters of sound natural tooth structure between the restorative margin and the alveolar crest, and additional patient records or periodontal charting may be requested when radiographs are inconclusive. The policy references generally accepted standards of dental practice, CDT coding (including D4249), and selected dental literature as the basis for guidance.

Source	Notes
References	CDT 2023 and selected dental literature on crown-to-root ratio and surgical crown lengthening

Generally accepted standards of dental practice: Standards based on credible scientific evidence in peer‑reviewed dental literature, specialty society recommendations, views of recognized dentists practicing in the relevant clinical area, and other credible sources.

OpenPayer

Dental Clinical Policy

Coverage Summary

Clinical Indications and General Criteria

Coding

Provider Actions

Background and Evidence

Revision History