D2544 - Onlay (Metal 4 Surf)
Metallic onlay - 4 or more surfaces.
- Procedure Code
- D2544
- Category
- Restorative
Insurance Verification Benchmarks & Billing Guidelines
Benchmark Policy Source: Delta Dental 2026
- Frequency Limitation
- 1 per tooth in a 60-month interval (5 years) (rolling_12_months)
- Age Limitation
- Restricted to patients age 12 or older. Crowns and onlays are denied for children under 12 years of age.
- Downgrade Policy Warning
- Inlay/onlay restoration is subject to LEPAT alternate benefit; payable as direct amalgam or composite restoration allowance.
Required Claim Attachments & Pre-Submission Checklist
- Diagnostic pre-operative radiograph showing affected tooth/area
- Pre-operative treatment narrative and clinical rationale
Bill When (Allowable Clinical Criteria)
- For inlay restorations, an alternate benefit will be allowed for an amalgam or resin restoration, according to the policies for amalgam and resin restorations. Any additional fee up to the approved amount for the inlay is chargeable to the patient.
Restrictions & Clinical Exclusions
- Crowns and onlays are not a benefit for children under 12 years of age. Benefits for patients under age 12 are denied.
- Restorative benefits are made for the least expensive professionally accepted treatment procedure (LEPAT). Any difference in the fee is denied.
- If the deciduous tooth is an “extra tooth” in addition to the normal complement of teeth, an inlay/onlay is not a benefit. Benefits are denied and the approved amount is chargeable to the patient.
- If an inlay/onlay is being proposed or has been done where periodontal bone support appears to be inadequate, benefits are denied due to the unfavorable prognosis for the tooth.
- Indirectly fabricated restorations include all models, temporaries and other associated procedures. Separate fees for models, temporaries, and other associated procedures by the same dentist/dental office are not billable to the patient.
- Benefits for restorations for altering occlusion, adjusting vertical dimension, replacing tooth structure lost by attrition, erosion, abrasion, abfraction, corrosion, TMD or for periodontal, orthodontic or other splinting are denied, unless covered by group/individual contract.
Common Claim Denial Codes & Overturn Strategies
| Denial Code | Denial Reason | Appeal & Overturn Strategy |
|---|---|---|
| CO-119 | Benefit maximum or frequency limitation exceeded for procedure | Submit clinical narrative detailing extraordinary circumstances, active recurrent pathology, or exception criteria. |
| CO-96 | Non-covered charge / Downgraded under Least Expensive Professionally Accepted Treatment (LEPAT) | Submit clinical photographs and narrative documenting why the alternate benefit material is clinically contraindicated. |
ICD-10 Justification & Crosswalk Mappings
| ICD-10 Code | Diagnosis Name | Category | Primary Justification | Claim Type | Clinical Scenario |
|---|