Summary & Overview
CPT 64727: Microsurgical Nerve Scar Excision (Neurolysis)
CPT code 64727 denotes microsurgical excision of scar tissue from within and between nerve fibers in the protective nerve sheath, a targeted neurolysis procedure used to free entrapped nerve fascicles and support nerve regeneration. This technically demanding operation is performed with an operating microscope and microsurgical instruments, commonly during repair of nerve compression injuries or peripheral nerve reconstruction. Nationally, accurate coding for 64727 matters for clinical tracking of complex nerve repairs, reimbursement clarity, and ensuring appropriate site-of-service documentation.
Key payers discussed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise review of the clinical context for the code, typical sites of service, and the common modifiers associated with surgical services. The publication also summarizes benchmarking and policy considerations relevant to payers and billing teams, and provides a practical overview to inform coding accuracy, claims submission, and medical record documentation.
This material is written for a national audience and focuses on the clinical and billing characteristics of CPT code 64727, enabling clinicians, coders, and policy analysts to understand where the code fits within peripheral nerve surgery service lines and payer coverage landscapes. Data not available in the input is noted where applicable.
Billing Code Overview
CPT code 64727 describes excision of scar tissue from within and between nerve fibers using an operating microscope and microsurgical techniques. The procedure targets scar formation in the protective nerve sheath (epineurium/perineurium) to free entrapped nerve fascicles and optimize nerve regeneration. This microsurgical excision is often performed in the course of repairing a nerve compression injury or as part of peripheral nerve reconstruction.
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Service type: Microsurgical nerve scar excision (neurolysis) performed with an operating microscope using microsurgical techniques
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Typical site of service: Operating room or outpatient surgical center where microsurgery and nerve repair procedures are performed
Clinical & Coding Specifications
Clinical Context
A 42-year-old patient presents with progressive sensory loss, pain, and weakness in the right hand following a forearm laceration six months earlier. Electrodiagnostic testing and clinical exam demonstrate ongoing median nerve dysfunction with tethering and symptomatic neuroma formation within the nerve sheath and impaired axonal regeneration. The surgical team schedules a peripheral nerve microsurgical procedure to excise intraneural scar (external and internal neurolysis) using an operating microscope and microsurgical instruments to free fascicles, reduce compressive scar, and optimize nerve regeneration. The typical workflow includes preoperative consent and marking, general or regional anesthesia, surgical exposure of the injured nerve, microsurgical internal and external neurolysis under the operating microscope, possible adjunctive procedures (e.g., nerve repair or grafting if a neuroma or transection is identified), hemostasis, layered closure, and postoperative immobilization with scheduled follow-up for wound check and serial neurologic assessments. Typical site of service is an inpatient or outpatient hospital surgical suite or ambulatory surgical center. The service type is operative microsurgery of a peripheral nerve (microsurgical intraneural scar excision) performed by a hand surgeon, peripheral nerve surgeon, or plastic/reconstructive surgeon trained in microsurgery.
Coding Specifications
| Modifier | Description | When to Use |
|---|---|---|
22 | Increased procedural services | Use when intraoperative complexity or time significantly exceeds typical for due to extensive scar, long segment neurolysis, or multiple nerve segments addressed. |