D9942ADA CDT ProcedureAdjunctiveMISCELLANEOUS SERVICES

D9942 - Repair Guard

Repair and/or reline of occlusal guard.

Patient-Friendly Summary: This service professionally repairs cracks, smooths damaged areas, or relines the internal surface of your existing nightguard. It is recommended when your guard has become loose, worn, or chipped, restoring its protective fit without the cost of a full replacement. The repair is handled with dental acrylics to ensure a smooth, comfortable fit against your teeth.
Clinical Documentation Notes: Not a covered benefit.
Procedure Code
D9942
Clinical Category
Adjunctive
Primary ICD-10 Justification
See mapped diagnoses below
Reference Fee & Claim Types
DENTAL

Insurance Verification Benchmarks & Billing Guidelines

Payer policy benchmarks, pre-submission attachment requirements, and denial prevention rules for D9942.

Source: Delta Dental 2026
Frequency Limitation
Subject to group/individual contract frequency limitations (none)

Required Claim Attachments & Pre-Submission Checklist

  • Standard ADA claim form with CDT procedure code and date of service

Bill When (Allowable Clinical Criteria)

  • Indicated for medically and clinically necessary treatment as documented in patient's dental record.

Restrictions & Clinical Exclusions

  • 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.
  • Benefits for sleep apnea services (D9947-D9957) are denied unless covered by group/individual contract.
  • Benefits for occlusal guard are denied unless covered by group/individual contract specific.
  • If covered, the fee for the occlusal guard includes any adjustment or repair required within six months of delivery. Fees for the adjustment or repair of the occlusal guard are not billable to the patient if performed by the same dentist/dental office within six months of initial placement.
  • If covered, the fee for repair of an occlusal guard cannot exceed one-half of the fee for a new appliance, and any excess fee is not billable to the patient.
  • General anesthesia and intravenous sedation are limited to one hour. Any additional minutes are not billable to the patient unless clinical documentation supports more than an hour was necessary. For example, special health care needs patients may require additional units of anesthesia and may be a benefit according to group/individual contract.

Common Claim Denial Codes & Overturn Strategies

Denial CodeDenial ReasonAppeal & Overturn Strategy
CO-119Benefit maximum or frequency limitation exceeded for procedureSubmit clinical narrative detailing extraordinary circumstances, active recurrent pathology, or exception criteria.

ICD-10-CM Justification & Crosswalk Mappings for D9942 (0)

Click any ICD-10-CM diagnosis code below to inspect its reverse procedure mappings and differential coding guide.

No direct ICD-10 mappings recorded for D9942.

Frequently Asked Questions — D9942 (Repair Guard)

Quick answers for dental billers and treatment coordinators submitting claims for D9942.

What ICD-10 diagnosis codes link to dental procedure D9942?▾

Currently no specific ICD-10 crosswalk mappings recorded for CDT D9942.

Can CDT code D9942 be billed to medical insurance?▾

Billing CDT D9942 (Repair Guard) to medical insurance depends on the underlying clinical necessity and trauma/pathology documentation. Supported claim types across linked diagnoses: DENTAL.

What attachments and documentation are required for billing CDT D9942?▾

Required claim attachments for CDT D9942 (Repair Guard) include: Standard ADA claim form with CDT procedure code and date of service.

What is the insurance frequency limitation for CDT D9942?▾

Standard commercial insurance frequency for D9942: Subject to group/individual contract frequency limitations (none).

What are common insurance denial reasons and appeal tips for CDT D9942?▾

Denial Code CO-119 (Benefit maximum or frequency limitation exceeded for procedure): Overturn appeal strategy - Submit clinical narrative detailing extraordinary circumstances, active recurrent pathology, or exception criteria.