Summary & Overview
CPT 64738: Inferior Alveolar Nerve Transection via Mandible
CPT code 64738 denotes surgical transection or forcible tearing of the inferior alveolar nerve through the mandible to reduce refractory facial pain. As an invasive neurosurgical/oral and maxillofacial procedure, it is uncommon and clinically significant because it intentionally reduces sensory input to manage severe pain conditions when other therapies have failed. Nationally, the code matters for coverage determinations, surgical utilization monitoring, and post-procedure care planning.
Key payers covered in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise briefing on the clinical context of the procedure, typical sites of service, and the kinds of benchmarks and policy topics that affect payment and utilization. The publication outlines common billing modifiers and service-line considerations, highlights areas where payer policies often differ (medical necessity criteria, prior authorization requirements, and documentation expectations), and summarizes implications for surgical coding and claims processing.
The report is intended for clinicians, coding professionals, and policy analysts seeking a national-level overview of CPT code 64738, its clinical purpose, and the administrative factors that influence reimbursement and utilization.
Billing Code Overview
CPT code 64738 describes a surgical procedure in which the provider transects or forcibly tears the inferior alveolar nerve by cutting or drilling a hole in the mandible bone to reduce facial pain by diminishing sensation. This procedure is a form of targeted surgical denervation of the inferior alveolar nerve.
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Service type: Surgical nerve transection / mandibular operative procedure
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Typical site of service: Hospital operating room or ambulatory surgery center where invasive oral and maxillofacial surgery is performed.
Clinical & Coding Specifications
Clinical Context
A typical patient is an adult with chronic, refractory trigeminal neuropathic pain localized to the mandibular (V3) distribution, often after dental trauma, failed root canal procedures, or persistent post‑operative neuralgia. The patient has tried conservative measures (medications such as carbamazepine, gabapentin, tricyclic antidepressants), nerve blocks, and possibly microvascular decompression without durable relief. The oral and maxillofacial surgeon or neurosurgeon evaluates history, imaging (mandibular radiographs or CT to assess the mandibular canal), and documents focal inferior alveolar nerve distribution pain and prior treatment attempts.
In the clinical workflow, informed consent addresses the goal of sensory diminution and risks including numbness, dysesthesia, anesthesia dolorosa, infection, bleeding, and jaw fracture. Preoperative planning includes medication reconciliation, applicable preop labs, and antibiotic prophylaxis per institutional policy. The procedure is performed in an operating room or ambulatory surgical center under general anesthesia or monitored anesthesia care. The surgeon accesses the mandible, identifies the inferior alveolar nerve canal, and transects or performs an osteotomy/drilling to interrupt the nerve to achieve analgesia. Postoperative care includes short-term analgesics, wound care, and follow‑up visits to assess sensory changes and pain relief. Documentation should include prior therapies, specific anatomic site, laterality, estimated blood loss, complications, and a clear operative description matching the work represented by 64738.
Coding Specifications
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