ICD-10-PCS Billable Code

0XUN4JZ

Supplement Index Finger, Right to No Qualifier with Synthetic Substitute, Percutaneous Endoscopic Approach

Procedural Specifications

Clinical Axis Detail Definition
Section0 Medical and Surgical
Body SystemX Anatomical Regions, Upper Extremities
OperationU Supplement
Body PartN Index Finger, Right
Approach4 Percutaneous Endoscopic
DeviceJ Synthetic Substitute
QualifierZ No Qualifier

Operation Definition

Putting in or on biological or synthetic material that physically reinforces and/or augments the function of a portion of a body part

Procedure Overview

Supplement procedures put in biological or synthetic material to reinforce or augment an upper extremity structure that remains in place, rather than replacing it outright. A typical scenario is applying a mesh or patch graft over an area of weakened soft tissue or fascia in the arm to strengthen it, or augmenting a regional defect with additional material while the native anatomy stays where it is.

This approach is chosen when the existing tissue is intact enough to remain functional but needs added support, commonly after trauma, chronic strain, or a structural weakness identified during another procedure. It differs from a from-scratch repair because material is physically added to bolster the area, and it differs from a full swap because nothing is being removed and replaced.

Anatomy & Axis Detail

Index Finger, Right

The right index finger, with its proximal, middle, and distal phalanges and associated flexor and extensor tendon mechanism, is supplemented when its soft tissue, tendon sheath, or bone needs reinforcement, such as a skin graft covering a fingertip defect or a collateral ligament reconstruction to restore lateral stability at the proximal interphalangeal joint. Because this finger works closely with the thumb in precision pinch, preserving both sensation and a smooth tendon gliding surface is a key concern when documenting the supplement material and its placement. This body part is commonly involved following crush or laceration injuries, chronic ligamentous instability, or reconstructive coverage after partial digit loss.

Approach: Percutaneous Endoscopic

Percutaneous Endoscopic combines a puncture through skin or mucous membrane with insertion of an endoscope to visualize the procedure internally, as in laparoscopic cholecystectomy. It is distinguished from plain Percutaneous by the presence of scope-guided visualization, and from Via Natural or Artificial Opening Endoscopic by its route being a new puncture rather than an existing orifice or stoma.

Device: Synthetic Substitute

Synthetic Substitute designates a device made from manufactured, non-biologic material, such as mesh or prosthetic components, used to replace or augment a body part. It is distinguished from the two tissue substitute categories by its artificial composition, which carries different considerations for integration and long-term durability than biologic grafts.

Coding & Documentation

Coders assign a code from this family when the operative note documents that graft, mesh, or synthetic material was placed onto or into an existing upper extremity structure purely to reinforce or augment it, with the native tissue left intact, and the documentation should specify the material type and the exact regional location covered. A common error is coding Supplement when the surgeon actually excised damaged tissue first and put in a substitute, which belongs under Replacement instead. Another recurring issue is failing to capture whether the reinforcing material is autologous, nonautologous, or synthetic, since this qualifier changes the specific code and is easy to overlook if the operative note only says "graft placed" without further detail.

Commonly Confused With

ReplacementThe closest point of confusion is with Replacement, and the distinguishing question is always whether native tissue was removed before the new material went in; if nothing was excised, Supplement applies.
RepairIt can also be confused with Repair when reinforcing material blurs into what looks like routine wound closure, but Repair does not involve adding permanent material to strengthen the structure.