Summary & Overview
CPT 64856: Major Peripheral Nerve Repair with Transposition
CPT code 64856 represents open surgical repair of a major peripheral nerve of the arm or leg (other than the sciatic nerve) that includes suturing of the nerve and transposition to a new adjacent location. This procedure is clinically important for restoring nerve continuity and function after traumatic injury or when entrapment or prior scarring necessitates relocation. Nationally, accurate coding for complex nerve repairs affects clinical documentation, appropriate surgical reimbursement, and postoperative care pathways.
Key payers covered in this overview include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a clinical and billing-focused briefing explaining the procedure type, typical settings where it is performed, and the administrative context for claims handling. The publication also summarizes benchmarking elements, common modifier usage (where provided), and implications for payer adjudication and documentation expectations.
The analysis provides clinicians and coding professionals with a concise reference on service definition and typical site of service, an orientation to payer coverage landscape, and guidance on what to review in clinical documentation to support correct coding. Data not available in the input is identified where applicable.
Billing Code Overview
CPT code 64856 describes surgical repair of a major peripheral nerve of the arm or leg (excluding the sciatic nerve) using suturing techniques combined with nerve transposition, in which the nerve is moved to a more suitable adjacent location.
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Service type: Major peripheral nerve repair with transposition (surgical procedure)
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Typical site of service: Hospital operating room or ambulatory surgical center, depending on clinical complexity and provider judgement.
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Clinical & Coding Specifications
Clinical Context
A 32-year-old construction worker presents after a laceration to the forearm sustained from machinery. Examination reveals motor weakness and numbness in the distribution of a major peripheral nerve of the arm (radial nerve) with an open wound and exposed nerve ends. Imaging and clinical exam confirm nerve transection with tension on the ends. The patient is taken to the operating room for exploration, debridement, primary neurorrhaphy and transposition of the nerve to a position with less tension and better soft-tissue coverage. The surgical workflow includes preoperative consent and localization, general anesthesia with regional block as indicated, irrigation and debridement of contaminated tissue, identification of proximal and distal nerve stumps, trimming to healthy fascicles, microsurgical epineural or group fascicular suturing to repair the nerve (64856), and transposition of the nerve to a more suitable anatomic bed to prevent recurrence of entrapment or tension. Ancillary steps include hemostasis, layered wound closure, sterile dressing, postoperative neurovascular checks, and scheduled follow-up for wound care and neurologic rehabilitation such as physical therapy and electrodiagnostic testing to monitor reinnervation.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | When substantially greater work than typical for is documented (extensive debridement, prolonged operative time) |