Reviewed by Dr. Morgan Heminger · Updated July 12, 2026
What Is D3428? (CDT Code Overview)
CDT code D3428 (Bone Graft with Periradicular Surgery) is the dental procedure code for bone grafting procedures performed alongside periradicular surgery —specifically for each tooth at an individual site. It belongs to the Endodontics category of CDT codes (Apicoectomy/Periradicular subcategory).
When Should You Use D3428?
The D3428 dental code applies to bone grafting procedures performed alongside periradicular surgery—specifically for each tooth at an individual site. This code should be utilized when bone grafting becomes necessary to stabilize the tooth structure during surgical treatment of periapical conditions, including cysts, abscesses, or ongoing infections near the root apex. It's important to apply D3428 exclusively when the bone grafting occurs concurrently with the periradicular treatment and not as an independent service or combined with different oral surgery types.
Quick reference: Use D3428 when the clinical scenario specifically matches bone graft with periradicular surgery. Do not use this code as a substitute for related procedures in the same category. Consider whether D3410 (Apicoectomy Procedure Guide) or D3421 (Apicoectomy Procedure) might be more appropriate instead.
D3428 vs. Similar CDT Codes: Key Differences
Dental teams frequently confuse D3428 with other codes in the apicoectomy/periradicular range. Here is how D3428 differs from the most commonly mixed-up codes:
Code | Procedure | Use it for |
|---|---|---|
D3428 | Bone Graft with Periradicular Surgery | Bone grafting procedures performed alongside periradicular surgery —specifically for each tooth at an individual site |
Apicoectomy Procedure Guide | Apicoectomy procedures performed on anterior teeth | |
Apicoectomy Procedure | Apicoectomy procedures performed on anterior teeth that have multiple roots, specifically targeting the first root | |
Molar Apicoectomy Procedures | Applied for apicoectomy procedures on molar teeth |
Documentation Requirements for D3428
Proper documentation remains vital for effective claim processing and payment approval. Medical records must clearly document:
The condition requiring periradicular surgery (e.g., chronic periapical abscess).
The exact tooth and location being treated.
Information about the bone graft material utilized (allograft, xenograft, or autograft).
Justification for graft application (e.g., to rebuild bone support following lesion extraction).
Before and after X-rays and surgical photographs when available.
Typical clinical situations involve apicoectomy with substantial bone defects, or cases where alveolar bone stability is affected and immediate grafting is required for proper healing and long-term success.
Documentation checklist for D3428:
Patient chief complaint and relevant medical/dental history clearly recorded.
Clinical findings that support the use of D3428 specifically (not a more general or more specific code).
Any diagnostic tests, imaging, or supplementary data that justify the procedure.
Treatment plan with rationale connecting the diagnosis to the procedure coded as D3428.
Post-procedure notes, including outcomes and follow-up recommendations.
Insurance and Billing Guide for D3428
To optimize payment and reduce claim rejections for D3428, implement these recommended strategies:
Check benefits: Prior to treatment, validate with the patient's dental plan whether D3428 receives coverage, as certain policies might classify it as medical or exclude grafting treatments.
Include supporting materials: Always attach medical records, X-rays, and a detailed explanation regarding the clinical necessity of the bone graft with your submission.
Apply accurate coding: Make sure D3428 isn't billed alongside codes for grafts in different situations, such as ridge preservation grafting, unless both treatments are clearly documented and executed.
Contest rejections: When claims get denied, examine the Explanation of Benefits (EOB), respond to the insurer's concerns, and file a comprehensive appeal with extra documentation when necessary.
Effective dental practices create documentation checklists and assign staff members to monitor claims and manage Accounts Receivable (AR) for surgical treatments like D3428.
Common denial reasons for D3428: Lack of clinical documentation, frequency limitations exceeded, code mismatch with diagnosis, or missing prior authorization. When appealing a denied D3428 claim, include a detailed narrative explaining why the procedure was necessary, supporting clinical evidence, and relevant imaging or test results. Many practices find that well-documented first submissions dramatically reduce the need for appeals.
To improve your overall claims workflow, explore How to Post Insurance Payments in a Dental Office.
Real-World Case Example: Billing D3428
A patient presents requiring a procedure consistent with D3428 (bone graft with periradicular surgery). The treating dentist documents the clinical findings, performs the procedure as indicated, and records detailed notes including the diagnosis, technique, and outcome. The billing team verifies insurance coverage, submits the claim with D3428 and supporting documentation, and follows up to ensure timely reimbursement. When the initial claim is processed, the practice reviews the Explanation of Benefits and addresses any discrepancies promptly.
Related CDT Codes to D3428
If you are researching D3428, you may also need to reference these related CDT codes in the apicoectomy/periradicular range and beyond:
D3110: Direct Pulp Cap — Learn when to use D3110 and how it differs from D3428.
D3120: Indirect Pulp Cap Procedure — Learn when to use D3120 and how it differs from D3428.
D3220: Therapeutic Pulpotomy Procedures — Learn when to use D3220 and how it differs from D3428.
D3221: Pulpal Debridement Emergency Treatment — Learn when to use D3221 and how it differs from D3428.
D3310: Anterior Root Canal Therapy — Learn when to use D3310 and how it differs from D3428.
Frequently Asked Questions About D3428
Is it appropriate to bill D3428 alongside other bone grafting procedures for the same treatment site?
D3428 cannot be billed with additional bone grafting codes for the same site during one surgical session. This code is designated exclusively for bone grafts conducted at a single location alongside periradicular surgery. Submitting multiple grafting codes for identical sites may lead to claim rejections or insurance audits for duplicated procedures. Always verify with the specific insurance carrier, as policies and coverage rules can vary significantly between payers. Maintaining thorough documentation for D3428 will strengthen your position in any audit or appeal scenario.
Which bone graft materials are generally approved for D3428 billing?
Insurance providers commonly approve various grafting materials for D3428 procedures, such as allografts from donors, xenografts from animal sources, and autografts from the patient's own bone. Proper documentation of the specific material used must be included in clinical records and claim submissions to demonstrate medical necessity and secure appropriate reimbursement. Always verify with the specific insurance carrier, as policies and coverage rules can vary significantly between payers. Maintaining thorough documentation for D3428 will strengthen your position in any audit or appeal scenario.
What steps should dental offices take when D3428 claims are rejected by insurance?
When D3428 claims face denial, offices should carefully examine the Explanation of Benefits to identify the rejection cause. Frequent denial reasons include insufficient documentation, absent radiographic evidence, or medical necessity concerns. Offices must file appeals quickly with comprehensive supporting materials, including thorough clinical documentation, radiographic images, and detailed explanations justifying the bone graft's necessity during periradicular surgery. Always verify with the specific insurance carrier, as policies and coverage rules can vary significantly between payers. Maintaining thorough documentation for D3428 will strengthen your position in any audit or appeal scenario.
What is the typical reimbursement range for D3428?
Reimbursement for D3428 (bone graft with periradicular surgery) varies based on geographic location, payer contract terms, and whether the patient has in-network or out-of-network coverage. Fee schedules are typically set by individual insurance carriers, so practices should verify expected reimbursement during benefits verification. If your practice consistently receives lower-than-expected payments for D3428, consider renegotiating your fee schedule with major payers or reviewing your UCR (Usual, Customary, and Reasonable) data for your region.
Does D3428 require prior authorization?
Prior authorization requirements for D3428 depend on the patient's specific insurance plan. Some carriers require advance approval for procedures coded under D3428, while others process claims without it. Best practice is to verify authorization requirements during insurance eligibility checks before the appointment. If prior authorization is required, submit the request with detailed clinical notes and supporting documentation to avoid delays in patient care and claim processing.