01R407Z
Replacement Ulnar Nerve to No Qualifier with Autologous Tissue Substitute, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 1 Peripheral Nervous System |
| Operation | R Replacement |
| Body Part | 4 Ulnar Nerve |
| Approach | 0 Open |
| Device | 7 Autologous Tissue Substitute |
| Qualifier | Z No Qualifier |
Operation Definition
Putting in or on biological or synthetic material that physically takes the place and/or function of all or a portion of a body part
Procedure Overview
This family covers replacing a segment of damaged peripheral nerve with graft material or a synthetic conduit that physically takes the place of the missing nerve tissue, used when the ends of an injured nerve cannot be brought together without excessive tension. Rather than suturing torn ends directly, the surgeon bridges the gap using a nerve autograft harvested from elsewhere in the patient's body, a nerve allograft from a donor, or a manufactured nerve conduit.
This approach is chosen when trauma, tumor resection, or a prior failed repair has left a defect too large for direct reconnection, since forcing damaged nerve ends together under tension typically worsens the chance of meaningful recovery. The graft or conduit serves as a scaffold that the patient's own regenerating nerve fibers grow through over time.
Candidates for this procedure usually have a documented nerve gap measured during surgery, and the choice between autograft, allograft, or conduit depends on the gap length, the nerve involved, and the surgeon's assessment of expected regeneration.
Anatomy & Axis Detail
Ulnar Nerve
The ulnar nerve travels behind the medial epicondyle and through Guyon's canal to supply the intrinsic hand muscles and sensation to the ring and little fingers, and it is one of the peripheral nerves most frequently reconstructed after severe elbow fracture-dislocation, laceration, or gunshot injury. When a segment is missing or too damaged to reapproximate directly, Replacement substitutes that gap with an autograft, commonly the sural or medial antebrachial cutaneous nerve, or with a processed allograft or synthetic conduit, sutured under the operating microscope to healthy nerve ends. The nerve's superficial course at the elbow and its long distal run make graft length variable, and outcomes depend heavily on how quickly reinnervation reaches the small hand muscles. Documentation should identify the graft material and the specific forearm or elbow segment reconstructed rather than a simple direct repair.
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.
Device: Autologous Tissue Substitute
Autologous Tissue Substitute identifies a device value where material harvested from the patient's own body, such as an autograft, is used to replace or reconstruct a body part. Its defining feature is tissue origin from the patient, setting it apart from Nonautologous Tissue Substitute, sourced from a donor or animal, and Synthetic Substitute, made of manufactured material.
Coding & Documentation
Coding requires the operative note to specify the type of graft or conduit material used and confirm that it was placed to bridge a nerve gap rather than to reinforce or wrap an otherwise intact nerve. The donor nerve, if an autograft was harvested, may be documented as a separate procedure at the harvest site.
A frequent error is coding Replacement when the material was actually laid over or around an intact nerve for support, which is more consistent with Supplement rather than Replacement. Another common mistake is overlooking the harvest-site procedure when an autograft is used, since that donor nerve excision is typically reportable in addition to the graft placement itself.