01S90ZZ
Reposition Lumbar Plexus 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 | S Reposition |
| Body Part | 9 Lumbar Plexus |
| Approach | 0 Open |
| Device | Z No Device |
| Qualifier | Z No Qualifier |
Operation Definition
Moving to its normal location, or other suitable location, all or a portion of a body part
Procedure Overview
This family covers procedures that move a peripheral nerve back to its normal anatomical course, or to a different suitable location, without cutting across the nerve's continuity. A nerve can end up out of place from a traumatic injury, a compressive mass, scar tissue, or a congenital anomaly, and repositioning it relieves the resulting pain, numbness, or weakness by taking pressure off the nerve or restoring its natural path. Ulnar nerve transposition at the elbow for cubital tunnel syndrome is a familiar example, where the nerve is freed and rerouted in front of the medial epicondyle so it no longer catches or stretches with elbow motion.
Because the nerve itself is not removed, replaced, or rerouted to do another nerve's job, these operations are aimed purely at correcting the nerve's position, distinguishing them from repairs that restore a severed nerve's continuity.
Anatomy & Axis Detail
Lumbar Plexus
The lumbar plexus forms within the substance of the psoas major muscle from the ventral rami of L1 through L4, giving rise to the femoral, obturator, and other nerves that govern hip and thigh function. Because the plexus is embedded in muscle rather than lying in an open space, reposition is a technically demanding procedure typically performed for retroperitoneal tumors, pelvic trauma, or fibrosis following prior abdominal or spine surgery that has trapped the plexus against adjacent structures. The surgeon must dissect through psoas fibers while protecting the plexus's multiple emerging branches and staying clear of the lumbar vertebral bodies and great vessels that lie nearby. Given its deep retroperitoneal location, imaging guidance and careful surgical planning are typically needed before any attempt to mobilize and relocate this structure.
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 needs to describe the nerve moved, the reason it was out of position (entrapment, tumor mass effect, dislocation, prior injury), and where it was relocated to. Operative notes for transposition procedures should make clear that the nerve was freed and rerouted, not decompressed in place, since a simple release of surrounding tissue without moving the nerve belongs to a different root operation. A common assignment error is coding an in-situ decompression (such as a straightforward carpal tunnel release) as Reposition when the nerve was only freed from surrounding tissue and not physically relocated - that scenario is Release, not Reposition. Coders should also confirm the body part value matches the specific nerve or plexus segment named in the note, since peripheral nerve values are granular by nerve name and laterality.