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CPT 64893: Single-Strand Nerve Graft for Arm or Leg (>4 cm)

CPT code 64893 covers single-strand nerve grafting to repair or bridge injured peripheral nerves of the arm or leg when the graft exceeds 4 cm in length. This surgical code captures complex reconstruction procedures used by peripheral nerve and hand surgeons, orthopedic surgeons, and plastic surgeons to restore continuity and function after traumatic or iatrogenic nerve injuries. Nationally, accurate coding for longer nerve grafts affects clinical reporting, surgical case mix, and payment determinations for hospital and ambulatory surgical services.

Key payers evaluated in this analysis include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical procedure and typical sites of service, benchmark considerations for reimbursement coding, common billing modifiers, and coding relationships that influence claim adjudication. The report also summarizes policy and coverage themes relevant to longer peripheral nerve grafts and highlights documentation elements that support correct code selection.

The content is intended for coding professionals, surgical billing teams, and policy analysts seeking a national perspective on CPT code 64893, covering clinical context, coding implications, and the types of benchmarks and policy updates to monitor.

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Billing Code Overview

CPT code 64893 describes a single-strand nerve graft procedure in which a portion of an unrelated nerve is used to bridge or repair an injured peripheral nerve of an arm or leg. The graft length for this code is greater than 4 cm, distinguishing it from shorter graft procedures.

Service type: Peripheral nerve reconstruction using an autologous or noncontiguous nerve graft.

Typical site of service: Operating room or ambulatory surgical center for upper or lower extremity nerve repair.

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CPT 64893: Single-Strand Nerve Graft for Arm or Leg (>4 cm)

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Billing Code Overview

Service type: Peripheral nerve reconstruction using an autologous or noncontiguous nerve graft.

Typical site of service: Operating room or ambulatory surgical center for upper or lower extremity nerve repair.

Clinical & Coding Specifications

Clinical Context

A typical patient is a 35–55-year-old adult who sustained a traumatic transection or segmental loss of a peripheral nerve in the forearm or lower leg after a laceration or crush injury. The patient presents with motor weakness, sensory loss, and positive findings on electrodiagnostic testing demonstrating a gap in continuity of a major mixed nerve (for example the median, ulnar, radial, tibial, or peroneal nerve) that cannot be repaired with direct end-to-end coaptation. Imaging and intraoperative findings confirm a nerve defect greater than 4 cm. The surgical workflow includes preoperative informed consent and documentation of neurologic deficits, intraoperative nerve exploration and debridement, harvest or preparation of a single-strand autograft from an unrelated donor nerve (e.g., sural nerve), microsurgical bridging of the defect with the graft, and layered closure. Postoperative care includes immobilization, pain control, wound checks, and planned follow-up for rehabilitation and electrodiagnostic reassessment. Typical site of service is an outpatient or inpatient operating room in a hospital or ambulatory surgery center. The service type is major reconstructive peripheral nerve surgery of the arm or leg.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural service	Use when the work, time, and technical effort significantly exceed typical for `64893`.
`23`	Unusual anesthesia	Use when general anesthesia is required for a procedure usually performed with local/regional anesthesia.
`26`	Professional component	Use when reporting only the professional component of a bundled service (rare for `64893`).
`50`	Bilateral procedure	Use when identical nerve grafting is performed on both left and right limbs during the same operative session.
`52`	Reduced services	Use when the planned nerve grafting was partially reduced or not completed.
`53`	Discontinued procedure	Use when the procedure is started but discontinued for patient-related or intraoperative reasons.
`59`	Distinct procedural service	Use to indicate a separate incision or distinct procedural service performed in addition to `64893`.
`62`	Two surgeons	Use when two surgeons with separate NPI numbers perform distinct operative components of the repair.
`78`	Return to OR for related procedure during postoperative period	Use when the patient returns to the operating room for complications of the initial nerve graft.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon performs part of the procedure.
`81`	Minimum assistant surgeon	Use when a minimal assistant participation is documented.
`82`	Assistant not otherwise classified	Use when a surgical assistant is needed but not covered by the usual assistant surgeon modifiers.
`62`	Co-surgeons	Use when co-surgeons share responsibility for the critical portions of the operation.

Taxonomy Code	Specialty	Notes
`2080S0002X`	Orthopaedic Surgery	Common specialty performing upper- and lower-extremity peripheral nerve repairs.
`208000000X`	General Surgery	May perform peripheral nerve repairs in trauma or reconstructive settings.
`2084P0800X`	Plastic Surgery	Frequently performs complex nerve grafting and microsurgical reconstruction.
`207RH0000X`	Neurological Surgery	Performs peripheral nerve repair in selected trauma or brachial plexus cases.
`225100000X`	Physical Medicine and Rehabilitation	Involved in pre- and postoperative functional assessment and rehabilitation planning.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S54.1X1A`	Laceration of radial nerve at forearm level, initial encounter	Radial nerve transection with a gap requiring grafting in the forearm.
`S64.1X1A`	Laceration of ulnar nerve at wrist and hand level, initial encounter	Ulnar nerve injury with segmental loss appropriate for graft reconstruction.
`S54.2X1A`	Laceration of median nerve at forearm level, initial encounter	Median nerve defect greater than 4 cm that necessitates a nerve graft.
`S84.1X1A`	Laceration of tibial nerve at lower leg level, initial encounter	Tibial nerve injury in the leg with segmental loss repaired with grafting.
`S84.2X1A`	Laceration of common peroneal nerve at lower leg level, initial encounter	Peroneal nerve transection requiring interposition nerve grafting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`64895`	Repair of single peripheral nerve with graft, trunk or branch of brachial plexus (includes direct repair and grafting)	Alternative/adjacent code for nerve grafting in brachial plexus or more proximal nerves; chosen when anatomy or technique differs from `64893`.
`69990`	Microsurgical techniques (use of operating microscope)	Often reported when an operating microscope is used during the microsurgical nerve repair and grafting.
`64721`	Excision of neuroma, peripheral nerve	May be performed prior to grafting when a neuroma is debrided before placement of a nerve graft.
`64718`	Neuroplasty and/or transposition; major peripheral nerve	Performed when nerve decompression or neuroplasty is required in the same operative field.
`20926`	Autograft for spine surgery (includes obtaining graft) — surrogate for autograft harvesting	When autologous nerve (e.g., sural nerve) is harvested, a graft-harvest code may be reported if separately billable by applicable payer rules.

Related Codes

CPT-64885-NERVE-GRAFT-HEAD-NECK

CPT 64885: Nerve Graft for Head or Neck, Up to 4 cm

CPT-64886-NERVE-GRAFT-HEAD-NECK-GRAFT-LONGER-THAN-4CM

CPT 64886: Nerve Graft, Head and Neck, Donor Segment >4 cm

CPT-64890-NERVE-GRAFT-RECONSTRUCTION-HAND-FOOT

CPT 64890: Peripheral Nerve Graft for Hand or Foot

CPT-64891-NERVE-GRAFT-HAND-FOOT-LONG-SEGMENT

CPT 64891: Autologous Nerve Graft for Hand or Foot (>4 cm)

CPT-64892-NERVE-GRAFT-UP-TO-4CM-UPPER-LOWER-EXTREMITY

CPT 64892: Single-Strand Nerve Graft for Arm or Leg (≤4 cm)

CPT-64895-MULTIPLE-STRAND-NERVE-GRAFT-HAND-FOOT-UP-TO-4CM

CPT 64895: Multiple Strand Nerve Graft for Hand or Foot (Up to 4 cm)

CPT-64896-MULTIPLE-STRAND-NERVE-GRAFT-HAND-FOOT

CPT 64896: Multiple Strand Nerve Graft for Hand or Foot Repair

CPT-64897-NERVE-GRAFT-MULTIPLE-STRAND-UPPER-OR-LOWER-EXTREMITY

CPT 64897: Multiple Strand Nerve Graft for Arm or Leg Repair

CPT-64898-MULTIPLE-STRAND-NERVE-GRAFT-PERIPHERAL-NERVE-REPAIR

CPT 64898: Multiple Strand Nerve Graft for Peripheral Nerve Repair

CPT-64901-ADDITIONAL-SINGLE-STRAND-NERVE-GRAFT-REPAIR

CPT 64901: Additional Single-Strand Nerve Graft Repair

Showing 1–10 of 17

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.

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Clinical & Coding Specifications

Clinical Context

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural service	Use when the work, time, and technical effort significantly exceed typical for `64893`.
`23`	Unusual anesthesia	Use when general anesthesia is required for a procedure usually performed with local/regional anesthesia.
`26`	Professional component	Use when reporting only the professional component of a bundled service (rare for `64893`).
`50`	Bilateral procedure	Use when identical nerve grafting is performed on both left and right limbs during the same operative session.
`52`	Reduced services	Use when the planned nerve grafting was partially reduced or not completed.
`53`	Discontinued procedure	Use when the procedure is started but discontinued for patient-related or intraoperative reasons.
`59`	Distinct procedural service	Use to indicate a separate incision or distinct procedural service performed in addition to `64893`.
`62`	Two surgeons	Use when two surgeons with separate NPI numbers perform distinct operative components of the repair.
`78`	Return to OR for related procedure during postoperative period	Use when the patient returns to the operating room for complications of the initial nerve graft.
`79`	Unrelated procedure or service by the same physician during the postoperative period	Use when an unrelated procedure is performed during the global period.
`80`	Assistant surgeon	Use when an assistant surgeon performs part of the procedure.
`81`	Minimum assistant surgeon	Use when a minimal assistant participation is documented.
`82`	Assistant not otherwise classified	Use when a surgical assistant is needed but not covered by the usual assistant surgeon modifiers.
`62`	Co-surgeons	Use when co-surgeons share responsibility for the critical portions of the operation.

Taxonomy Code	Specialty	Notes
`2080S0002X`	Orthopaedic Surgery	Common specialty performing upper- and lower-extremity peripheral nerve repairs.
`208000000X`	General Surgery	May perform peripheral nerve repairs in trauma or reconstructive settings.
`2084P0800X`	Plastic Surgery	Frequently performs complex nerve grafting and microsurgical reconstruction.
`207RH0000X`	Neurological Surgery	Performs peripheral nerve repair in selected trauma or brachial plexus cases.
`225100000X`	Physical Medicine and Rehabilitation	Involved in pre- and postoperative functional assessment and rehabilitation planning.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S54.1X1A`	Laceration of radial nerve at forearm level, initial encounter	Radial nerve transection with a gap requiring grafting in the forearm.
`S64.1X1A`	Laceration of ulnar nerve at wrist and hand level, initial encounter	Ulnar nerve injury with segmental loss appropriate for graft reconstruction.
`S54.2X1A`	Laceration of median nerve at forearm level, initial encounter	Median nerve defect greater than 4 cm that necessitates a nerve graft.
`S84.1X1A`	Laceration of tibial nerve at lower leg level, initial encounter	Tibial nerve injury in the leg with segmental loss repaired with grafting.
`S84.2X1A`	Laceration of common peroneal nerve at lower leg level, initial encounter	Peroneal nerve transection requiring interposition nerve grafting.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`64895`	Repair of single peripheral nerve with graft, trunk or branch of brachial plexus (includes direct repair and grafting)	Alternative/adjacent code for nerve grafting in brachial plexus or more proximal nerves; chosen when anatomy or technique differs from `64893`.
`69990`	Microsurgical techniques (use of operating microscope)	Often reported when an operating microscope is used during the microsurgical nerve repair and grafting.
`64721`	Excision of neuroma, peripheral nerve	May be performed prior to grafting when a neuroma is debrided before placement of a nerve graft.
`64718`	Neuroplasty and/or transposition; major peripheral nerve	Performed when nerve decompression or neuroplasty is required in the same operative field.
`20926`	Autograft for spine surgery (includes obtaining graft) — surrogate for autograft harvesting	When autologous nerve (e.g., sural nerve) is harvested, a graft-harvest code may be reported if separately billable by applicable payer rules.

Related Codes

CPT-64885-NERVE-GRAFT-HEAD-NECK

CPT 64885: Nerve Graft for Head or Neck, Up to 4 cm

CPT-64886-NERVE-GRAFT-HEAD-NECK-GRAFT-LONGER-THAN-4CM

CPT 64886: Nerve Graft, Head and Neck, Donor Segment >4 cm

CPT-64890-NERVE-GRAFT-RECONSTRUCTION-HAND-FOOT

CPT 64890: Peripheral Nerve Graft for Hand or Foot

CPT-64891-NERVE-GRAFT-HAND-FOOT-LONG-SEGMENT

CPT 64891: Autologous Nerve Graft for Hand or Foot (>4 cm)

CPT-64892-NERVE-GRAFT-UP-TO-4CM-UPPER-LOWER-EXTREMITY

CPT 64892: Single-Strand Nerve Graft for Arm or Leg (≤4 cm)

CPT-64895-MULTIPLE-STRAND-NERVE-GRAFT-HAND-FOOT-UP-TO-4CM

CPT 64895: Multiple Strand Nerve Graft for Hand or Foot (Up to 4 cm)

CPT-64896-MULTIPLE-STRAND-NERVE-GRAFT-HAND-FOOT

CPT 64896: Multiple Strand Nerve Graft for Hand or Foot Repair

CPT-64897-NERVE-GRAFT-MULTIPLE-STRAND-UPPER-OR-LOWER-EXTREMITY

CPT 64897: Multiple Strand Nerve Graft for Arm or Leg Repair

CPT-64898-MULTIPLE-STRAND-NERVE-GRAFT-PERIPHERAL-NERVE-REPAIR

CPT 64898: Multiple Strand Nerve Graft for Peripheral Nerve Repair

CPT-64901-ADDITIONAL-SINGLE-STRAND-NERVE-GRAFT-REPAIR

CPT 64901: Additional Single-Strand Nerve Graft Repair

Showing 1–10 of 17

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

CPT 64893: Single-Strand Nerve Graft for Arm or Leg (>4 cm)

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Billing Code Overview

CPT 64893: Single-Strand Nerve Graft for Arm or Leg (>4 cm)

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Billing Code Overview

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical procedure does CPT 64893 represent?

Which billing modifiers are commonly associated with 64893 and when should they be considered?

What related CPT codes might be reported with 64893?

What clinical scenario and findings typically justify using 64893?

Which specialties perform 64893 and which payers were evaluated in the summary?

References

Clinical & Coding Specifications

Clinical Context

Coding Specifications

Related Diagnoses

Related CPT Codes

Related Codes

What clinical procedure does CPT 64893 represent?

Which billing modifiers are commonly associated with 64893 and when should they be considered?

What related CPT codes might be reported with 64893?

What clinical scenario and findings typically justify using 64893?

Which specialties perform 64893 and which payers were evaluated in the summary?

References