Coding Ahead
CasePilot
Medical Coding Assistant
Case2Code
Search and Code Lookup Tool
RedactPHI
HIPAA-Compliant PHI Redaction
DetectICD10CM
ICD-10-CM Code Detection
Log in Register free account
1 code page views remaining. Guest accounts are limited to 1 page view. Register free account to get 5 more views.
Log in Register free account

Official Description

Nerve graft (includes obtaining graft), single strand, hand or foot; more than 4 cm length

© Copyright 2025 American Medical Association. All rights reserved.

Common Language Description

A nerve graft procedure involves the surgical repair of a damaged nerve in the hand or foot using a single strand of nerve tissue. This technique is employed to facilitate a tension-free repair of the injured nerve, which is crucial for restoring proper nerve function. During the procedure, the surgeon first exposes the injured nerve and assesses the extent of the damage. If necessary, any damaged tissue is carefully removed through a process known as debridement. To evaluate the function of the nerve, additional nerve testing and monitoring may be performed, which are reported separately. The procedure also involves the use of microscopic visualization to ensure precision. The healthy segments of the nerve, both proximal and distal to the injury, are meticulously dissected from the surrounding tissue. The length of the required nerve graft is then determined. A single strand nerve graft is harvested from a donor site, where the donor nerve is exposed, and the desired length is carefully dissected free. After the graft is obtained, it is divided at both ends and prepared for implantation. The graft is then sutured end-to-end to the severed ends of the injured nerve, allowing for reconnection. Finally, the overlying soft tissues and skin are repaired in layers to complete the procedure. It is important to note that this code, CPT® 64891, is specifically used when the length of the nerve graft exceeds 4 cm, while CPT® 64890 is applicable for grafts that are 4 cm or less.

© Copyright 2025 Coding Ahead. All rights reserved.

1. Indications

The nerve graft procedure is indicated for patients who have sustained nerve injuries in the hand or foot that require surgical intervention to restore function. The following conditions may warrant the use of this procedure:

  • Severe Nerve Injury: When a nerve has been significantly damaged due to trauma, laceration, or other injuries, necessitating repair to restore sensation and motor function.
  • Neuroma: The presence of a neuroma, which is a growth or tumor of nerve tissue, may require grafting to alleviate pain and restore nerve continuity.
  • Congenital Defects: In cases where individuals are born with nerve abnormalities that affect function, a nerve graft may be indicated to correct these issues.
  • Post-Surgical Complications: Nerve damage resulting from previous surgical procedures may also necessitate a nerve graft to repair the affected area.

2. Procedure

The nerve graft procedure consists of several critical steps to ensure successful repair of the injured nerve. Each step is essential for achieving optimal outcomes.

  • Step 1: Exposure of the Injured Nerve - The surgeon begins by making an incision to expose the injured nerve. This allows for a thorough evaluation of the extent of the nerve damage, which is crucial for determining the appropriate course of action.
  • Step 2: Debridement of Damaged Tissue - If there is any necrotic or damaged tissue surrounding the nerve, it is carefully debrided to prepare the site for grafting. This step is vital to ensure that only healthy tissue is involved in the repair process.
  • Step 3: Nerve Testing and Monitoring - To assess the function of the nerve, the surgeon may perform nerve testing and monitoring. These evaluations help in understanding the degree of nerve injury and guide the surgical approach.
  • Step 4: Microscopic Visualization - Utilizing microscopic techniques, the surgeon dissects the healthy proximal and distal segments of the nerve free from surrounding tissue. This precision is necessary to ensure that the graft can be properly aligned with the nerve ends.
  • Step 5: Harvesting the Nerve Graft - A single strand nerve graft is harvested from a donor site. The donor nerve is exposed, and the desired length is carefully dissected free from surrounding tissue. The graft is then divided proximally and distally for implantation.
  • Step 6: Suturing the Graft - The harvested nerve graft is sutured end-to-end to the severed ends of the injured nerve. This connection is critical for re-establishing nerve continuity and function.
  • Step 7: Repair of Overlying Tissues - Finally, the surgeon repairs the overlying soft tissues and skin in layers to ensure proper healing and minimize scarring.

3. Post-Procedure

After the nerve graft procedure, patients can expect a recovery period that may vary depending on the extent of the injury and the surgical intervention. Post-operative care typically includes monitoring for signs of infection, managing pain, and ensuring proper wound healing. Patients may also undergo physical therapy to regain strength and function in the affected area. Follow-up appointments are essential to assess the success of the graft and the recovery of nerve function. It is important for patients to adhere to their surgeon's post-operative instructions to optimize healing and functional recovery.

Short Descr NRV GRF 1STRND HND/FOOT >4CM
Medium Descr NERVE GRAFT 1 STRAND HAND/FOOT >4 CM
Long Descr Nerve graft (includes obtaining graft), single strand, hand or foot; more than 4 cm length
Status Code Active Code
Global Days 090 - Major Surgery
PC/TC Indicator (26, TC) 0 - Physician Service Code
Multiple Procedures (51) 2 - Standard payment adjustment rules for multiple procedures apply.
Bilateral Surgery (50) 0 - 150% payment adjustment for bilateral procedures does NOT apply.
Physician Supervisions 09 - Concept does not apply.
Assistant Surgeon (80, 82) 2 - Payment restriction for assistants at surgery does not apply to this procedure...
Co-Surgeons (62) 0 - Co-surgeons not permitted for this procedure.
Team Surgery (66) 0 - Team surgeons not permitted for this procedure.
Diagnostic Imaging Family 99 - Concept Does Not Apply
APC Status Indicator Hospital Part B services paid through a comprehensive APC
ASC Payment Indicator Device-intensive procedure added to ASC list in CY 2008 or later; paid at adjusted rate.
Type of Service (TOS) 2 - Surgery
Berenson-Eggers TOS (BETOS) P5E - Ambulatory procedures - other
MUE 2
CCS Clinical Classification 9 - Other OR therapeutic nervous system procedures

This is a primary code that can be used with these additional add-on codes.

64901 Addon Code MPFS Status: Active Code APC N ASC N1 CPT Assistant Article Illustration for Code Nerve graft, each additional nerve; single strand (List separately in addition to code for primary procedure)
69990 Addon Code MPFS Status: Restricted APC N ASC N1 PUB 100 CPT Assistant Article 1Microsurgical techniques, requiring use of operating microscope (List separately in addition to code for primary procedure)
51 Multiple procedures: when multiple procedures, other than e/m services, physical medicine and rehabilitation services or provision of supplies (eg, vaccines), are performed at the same session by the same individual, the primary procedure or service may be reported as listed. the additional procedure(s) or service(s) may be identified by appending modifier 51 to the additional procedure or service code(s). note: this modifier should not be appended to designated "add-on" codes (see appendix d).
GC This service has been performed in part by a resident under the direction of a teaching physician
LT Left side (used to identify procedures performed on the left side of the body)
RT Right side (used to identify procedures performed on the right side of the body)
Date
Action
Notes
2024-01-01 Changed Short and Medium Descriptions changed.
2013-01-01 Changed Short Descriptor changed.
2011-01-01 Changed Short description changed.
Pre-1990 Added Code added.
Code
Description
Code
Description
Code
Description
Code
Description
Code
Description
CasePilot

Get instant expert-level medical coding assistance.

Ask about:
CPT Codes Guidelines Modifiers Crosswalks NCCI Edits Compliance Medicare Coverage
Example: "What is CPT code 99213?" or "Guidelines for E/M services"