D3430 - Retrograde Filling
Retrograde filling – per root.
- Procedure Code
- D3430
- Category
- Endodontics
Insurance Verification Benchmarks & Billing Guidelines
Benchmark Policy Source: Delta Dental 2026
- Frequency Limitation
- Subject to group/individual contract frequency limitations (none)
Required Claim Attachments & Pre-Submission Checklist
- Diagnostic pre-operative radiograph showing affected tooth/area
Bill When (Allowable Clinical Criteria)
- Indicated for medically and clinically necessary treatment as documented in patient's dental record.
Restrictions & Clinical Exclusions
- The fees for biopsy (D7285, D7286), frenectomy (D7961 and D7962) and excision of hard and soft tissue lesions (D7410, D7411, D7450, D7451) are not billable to the patient when the procedures are performed on the same date of service, same surgical site/area, by the same dentist/dental office as the above referenced codes. Requests for individual consideration may always be submitted by report for dental consultant review.
- Retrograde filling includes all retrograde procedures per root. A maximum allowance is one retrograde filling per root (not per canal). Any excess of the allowance is not billable to the patient.
- The fee for biopsy of oral tissue, when performed in the same location and on the same date of service by the same dentist/dental office, is not billable to the patient as included in the fee for surgical procedures (e.g. apicoectomy).
- For benefit purposes, anesthesia is an integral part of the procedures being performed and additional fees are not billable to the patient.
- All services and treatment provided remotely via tele-health modalities, be they synchronous or asynchronous, must be performed by a licensed dentist or their supervised staff, acting within the scope of applicable law. Services and treatment delivered virtually are only a benefit when the elements included in the descriptor of the CDT procedure code are completed and only when they meet generally accepted clinical guidelines.
- 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 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. |
ICD-10 Justification & Crosswalk Mappings
| ICD-10 Code | Diagnosis Name | Category | Primary Justification | Claim Type | Clinical Scenario |
|---|