Summary & Overview

CPT 64901: Additional Single-Strand Nerve Graft Repair

CPT code 64901 represents an additional single-strand nerve graft repair performed during the same operative session as an initial nerve bridge or repair. It captures a specific, add-on surgical action using a portion of an unrelated donor nerve to bridge or repair a subsequent injured nerve. This precise coding matters nationally because it affects surgical documentation, bundling decisions, and accurate classification of complex peripheral nerve reconstruction procedures.

Key payers included in the analysis are Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise view of what CPT code 64901 covers clinically and operationally, how it fits into surgical service lines, and what to expect in terms of typical sites of service. The publication outlines benchmarks and policy-relevant points such as coding intent, common billing modifiers (listed separately), and the clinical context in which this add-on graft is used. It also highlights where data is available and notes when input fields were not provided.

This summary is intended for national audiences, including coding professionals, surgical teams, and revenue cycle stakeholders, to clarify the code’s clinical meaning, typical use cases, and the payer landscape relevant to nerve graft repair procedures.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 64901nerve graftperipheral nerve repairsurgical codingadd-on procedureoperative billingreconstructive surgeryrevenue cycleprocedure coding

Billing Code Overview

CPT code 64901 describes a surgical procedure in which the provider performs an additional single-strand nerve graft using a portion of an unrelated nerve to bridge or repair an injured portion of a subsequent nerve during the same operative session as an initial nerve bridge or repair. This procedure is a form of peripheral nerve reconstruction intended to restore continuity and function when a primary nerve repair or graft has already been performed in the same session.

Service type: Surgical peripheral nerve graft/repair
Typical site of service: Operative suite (inpatient or outpatient surgical setting), depending on the overall procedure context and patient needs.

Clinical & Coding Specifications

Clinical Context

A 42-year-old male construction worker presents after a work-related forearm laceration with multiple injured motor and sensory peripheral nerves. During the operative session the surgeon performs an initial nerve repair/bridge of the primary injured nerve and then, in the same session, harvests an autologous donor nerve segment and performs an additional single-strand nerve graft to bridge a separate, subsequently injured digital branch. The procedure is performed in an outpatient ambulatory surgery center under general anesthesia. Intraoperative steps include exploration of the injured nerve, trimming of neuroma or nonviable ends, measurement of the gap, harvesting of an unrelated donor nerve graft (single strand), microsurgical suture of the graft to the recipient nerve ends, hemostasis, and layered wound closure. Postoperative care includes observation in PACU, prescription for analgesia and antibiotics if indicated, instructions for wound care, and follow-up with the peripheral nerve surgeon for monitoring of reinnervation and rehabilitation with occupational therapy.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when the complexity, time, or technical difficulty of the nerve graft repair is substantially greater than typical for `64901` or related primary nerve procedures.
`23`	Unusual anesthesia	Use when the procedure is performed under general anesthesia and the services would normally be done with local or regional anesthesia, and documentation supports the unusual anesthesia circumstance.
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the repair or grafting during the same session.
`66`	Surgical team (multiple surgeons)	Use when a surgical team approach (separate roles defined) is used for a complex nerve reconstruction.
`52`	Reduced services	Use when the nerve graft procedure is partially reduced or not completed as described for `64901`.
`53`	Discontinued procedure	Use when the procedure is started but discontinued due to patient instability or unexpected findings preventing completion.
`78`	Unplanned return to OR	Use when the patient returns to the operating room intra- or postoperatively for a related complication requiring another procedure.
`80`	Assistant surgeon	Use when an assistant surgeon provides intraoperative hands-on assistance; append when allowed by payor policy.
`81`	Minimum assistant surgeon	Use when minimal assistance is provided by another surgeon and payor recognizes the lesser role.
`RT`	Right side	Use to indicate the procedure was performed on the right-sided nerve.
`LT`	Left side	Use to indicate the procedure was performed on the left-sided nerve.
`25`	Significant, separately identifiable E/M service on same day	Use when a distinct preoperative or postoperative evaluation meets criteria and is billed same day as the procedure.
`59`	Distinct procedural service	Use when another procedure performed in the same session is distinct and not normally bundled with `64901`.
`AS`	Ambulatory surgery center facility	Use to indicate the service was provided in an ambulatory surgery center setting when required by payor reporting.

Taxonomy Code	Specialty	Notes
207W00000X	Plastic Surgery	Surgeons who perform peripheral nerve repairs and grafting, including complex reconstruction.
2080P0207X	Orthopedic Surgery of the Hand	Hand and peripheral nerve specialists who manage traumatic nerve injuries and microsurgical nerve repair.
2084P0800X	Neurological Surgery	Neurosurgeons involved in peripheral nerve surgery in select complex cases.
207L00000X	General Surgery	General surgeons with training in peripheral nerve repair in trauma settings.
2085R0201X	Physical Medicine & Rehabilitation	Handles postoperative rehabilitation and nerve recovery management; not a billing surgeon for `64901`.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S54.11XA`	Laceration of radial nerve at forearm, initial encounter	Radial nerve lacerations commonly require grafting or repair; supports medical necessity for `64901` when a secondary nerve graft is performed in the same session.
`S64.011A`	Laceration of digital nerve of right index finger, initial encounter	Digital nerve injuries often require repair or grafting; a separate single-strand graft may be performed for an additional injured nerve.
`S44.011A`	Laceration of brachial plexus, initial encounter	More proximal nerve trauma that may necessitate complex reconstruction and additional grafting during the same operative session.
`G56.01`	Carpal tunnel syndrome, right upper limb	Chronic compressive neuropathies can coexist with traumatic nerve injuries; nerve grafting is less common but may be part of staged care.
`T79.A1XA`	Traumatic amputation of right arm, initial encounter	Severe traumatic injuries with multiple nerve deficits may require multiple nerve repairs and grafts in a single operative setting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`64874`	Repair of digital nerve, with or without nerve graft; direct repair	Often performed when a separate digital nerve requires primary repair rather than grafting; may occur in the same operative session for multi-nerve injuries.
`64831`	Exploration of nerve, endoscopic; forearm and/or wrist	Performed for diagnostic exploration of nerve continuity when indicated prior to definitive grafting or repair.
`69990`	Microsurgical techniques, requiring use of an operating microscope (list separately in addition to code for primary procedure)	Billed in addition when operative microscope is required for the nerve graft micro-suturing.
`15734`	Muscle, myocutaneous or fasciocutaneous flap with microvascular anastomosis (pedicle/free)	May be performed in complex soft tissue loss cases concurrent with nerve reconstruction to provide soft tissue coverage.
`24342`	Neuroplasty and/or transposition; ulnar nerve at elbow	Represents alternative or additional peripheral nerve procedures that may be performed in the same patient with multi-site nerve pathology.