01Q40ZZ
Repair Ulnar Nerve to No Qualifier with No Device, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 1 Peripheral Nervous System |
| Operation | Q Repair |
| Body Part | 4 Ulnar Nerve |
| Approach | 0 Open |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Restoring, to the extent possible, a body part to its normal anatomic structure and function
Procedure Overview
This family covers restoring a peripheral nerve to as close to its normal structure and function as possible after it has been cut, torn, or otherwise physically damaged, using suture repair or direct approximation of the nerve ends. It is the primary approach when a nerve laceration is found from a knife wound, glass injury, iatrogenic surgical injury, or a fracture that has sheared through the nerve.
The surgeon aligns the cut nerve ends under magnification, matching the internal fascicles as precisely as possible, and sutures them together so the nerve can regenerate along its original pathway. Timing matters clinically, since nerves repaired soon after injury generally recover better than those repaired after prolonged delay, though repair can still be attempted later in appropriate cases.
Outcomes depend on the nerve involved, the distance the injury is from the muscles or skin it serves, and how cleanly the nerve ends can be matched, but the goal is always to reestablish continuity using the patient's own nerve tissue.
Anatomy & Axis Detail
Ulnar Nerve
The ulnar nerve travels from the medial cord of the brachial plexus down the arm, through the cubital tunnel behind the medial epicondyle, and into the forearm and hand, where it governs intrinsic hand muscle function and sensation to the ring and little fingers. Repair is commonly needed after lacerations at the wrist or elbow, fractures involving the medial epicondyle, or penetrating trauma, using direct end-to-end suture when tension permits or interposition grafting for larger gaps. Because the nerve is superficial and vulnerable at the elbow and wrist, timely repair is important to prevent claw hand deformity and permanent intrinsic muscle atrophy. Documentation should specify the injury level, since ulnar nerve repair at the wrist versus elbow can carry different functional implications and surgical approaches.
Approach: Open
Open approach means the surgeon cuts through skin, mucous membrane, or other tissue layers to physically expose the target site to view before performing the procedure. It gives direct visualization and hands-on access, distinguishing it from Percutaneous approaches where instruments pass through a small puncture without exposing the site. Open is typical for procedures needing wide access, such as most laparotomies.
Coding & Documentation
Documentation supporting this code should describe direct suture of nerve ends or another technique that reconnects the nerve's own tissue without adding graft material. The note should identify which specific nerve was repaired and the mechanism of injury, since that context often appears in related trauma documentation.
A common mistake is assigning Repair when the surgeon actually bridged a gap with a nerve graft or synthetic conduit, which belongs under Replacement or Supplement instead of Repair. Another frequent error is coding Repair for a procedure that was really a Release, when the nerve was found intact and simply freed from surrounding scar rather than physically damaged and sutured.