ModifiedBlue Cross Blue Shield - MainePolicy 04-206

Clinical Crown Lengthening (2026 Policy) PDF. Opens in a new window

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Defines clinical indications, documentation and procedural criteria for coverage of clinical crown lengthening (hard tissue) for natural teeth, including exclusions, required radiographic documentation, healing interval, and concurrent procedure rules. Coding list is informational (CDT D4249).

Policy Summary

PayerBlue Cross Blue Shield - Maine

PolicyClinical Crown Lengthening (2026 Policy) PDF. Opens in a new window

Policy CodePolicy 04-206

Change TypeRevised (no material clinical changes)

Effective Date

Last ReviewJan 1, 2026

Next Review DateJan 1, 2027

Key ActionSubmit a dated diagnostic pretreatment radiograph (within 12 months) documenting less than 3 mm of sound tooth structure between restorative margin and alveolar crest.

SourceLink

POLICY UPDATE CHANGES

Policy status marked Revised with last review date 01/01/2026 and review entry 10/27/2025 indicating no clinical policy statement changes in latest revision history.

1Primary CDT code listed

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ModifiedBlue Cross Blue Shield - MainePolicy 04-206

Clinical Crown Lengthening (2026 Policy) PDF. Opens in a new window

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Sign up for Blue Cross Blue Shield - Maine Policy 04-206 alerts

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Policy Summary

PayerBlue Cross Blue Shield - Maine

PolicyClinical Crown Lengthening (2026 Policy) PDF. Opens in a new window

Policy CodePolicy 04-206

Change TypeRevised (no material clinical changes)

Effective Date

Last ReviewJan 1, 2026

Next Review DateJan 1, 2027

Key ActionSubmit a dated diagnostic pretreatment radiograph (within 12 months) documenting less than 3 mm of sound tooth structure between restorative margin and alveolar crest.

SourceLink

POLICY UPDATE CHANGES

Policy status marked Revised with last review date 01/01/2026 and review entry 10/27/2025 indicating no clinical policy statement changes in latest revision history.

1Primary CDT code listed

Coverage Summary

Policy 04-206 (Clinical Crown Lengthening) — status: Revised with last review 01/01/2026 and prior review entry 10/27/2025. Coverage stance: mixed. Scope: defines clinical indications, documentation and procedural criteria for coverage of clinical crown lengthening (hard tissue) for natural teeth. Key thresholds: radiographic documentation showing < 3 millimeters of sound tooth structure between the restorative margin and alveolar crest, a diagnostic radiograph current within 12 months, and a minimum healing interval of 4 weeks before final restoration.

Surface thresholds

Radiographic tooth structure distance< 3 millimeters (sound natural tooth structure between restorative margin and alveolar crest)

Radiograph recencyCurrent diagnostic pretreatment radiograph within 12 months

Healing interval before final restorationMinimum 4 weeks healing of bone and soft tissue

Primary CDT code listed (informational)D4249 (Clinical crown lengthening - hard tissue)

Primary CDT code listed count from stats/scope_summary1

Medically Necessary / Appropriate Criteria

Not Considered / Exclusions

Inclusive / Bundled Procedures

Billing Rule

Inclusive/bundled procedures

Clinical crown lengthening is inclusive with osseous surgery when performed in conjunction with osseous surgery for periodontal disease and mesial/distal wedge procedures when performed same date of service; crown lengthening on same date as crown procedure is considered inclusive (not separately benefited).

Coding

Informational CDT Code (example)CPT

D4249

Clinical crown lengthening - hard tissue

DiagnosesICD-10

No codes listed

Provider Actions / Documentation

Documentation Required

Submit pretreatment radiograph

Submit a dated diagnostic pretreatment radiograph (within 12 months) documenting less than 3 mm of sound tooth structure between restorative margin and alveolar crest.

Documentation Required

Periodontal charting may be required

Periodontal charting may be requested to document a healthy periodontal environment; additional patient records may be requested when radiographic indications are not evident.

Background

Clinical crown lengthening is a surgical dental procedure that reshapes or removes supporting bone to expose additional tooth structure so a restorative procedure can be completed. The operation requires reflection of a full thickness flap and removal of both hard (osseous) and soft (gingival) tissue in a healthy periodontal environment. The procedure alters the crown-root ratio; if the resulting crown-root ratio is inadequate due to the bone removal, the procedure provides no long-term benefit.

Key references include classic and contemporary dental/periodontal literature supporting the rationale and biologic considerations for surgical crown lengthening (e.g., J Am Dent Assoc. 1978; J Periodontol. 2003) and current coding guidance (CDT 2026).

Revision History

2026-01-01policy_reviewLatest

Policy status marked Revised with last review date 01/01/2026.

2025-10-27revision_history_note

Revision history entry for 10/27/2025 notes 'No Changes' (no clinical policy statement changes).

Policy Details & Key Facts

Policy metadata

Policy number04-206

Policy title/subjectClinical Crown Lengthening

PayerBlue Cross Blue Shield - Maine

StatusRevised / MODIFIED

Last review01/01/2026 (review entry 10/27/2025 noted 'No Changes')

Next review01/01/2027

Scope summaryDefines clinical indications, documentation and procedural criteria for coverage of clinical crown lengthening (hard tissue) for natural teeth, including exclusions, required radiographic documentation, healing interval, and concurrent procedure rules. Coding list is informational (CDT D4249).