ICD-10-PCS Billable Code

0SUB4KZ

Supplement Hip Joint, Left to No Qualifier with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach

Procedural Specifications

Clinical Axis Detail Definition
Section0 Medical and Surgical
Body SystemS Lower Joints
OperationU Supplement
Body PartB Hip Joint, Left
Approach4 Percutaneous Endoscopic
DeviceK Nonautologous Tissue 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 add biological or synthetic material to reinforce or augment a lower joint that is still structurally present but needs additional support. Ligament reconstruction, such as an ACL or PCL graft in the knee, is the classic example, along with labral augmentation in the hip or cartilage grafting. Unlike replacement, the native joint stays in place; the surgery strengthens a weakened or torn portion of it.

Grafts can come from the patient's own tissue, a donor, or synthetic material, and the choice often depends on age, activity level, and the structure being reinforced. These procedures are common after athletic injuries, aiming to restore stability so the joint can withstand normal or athletic loads again.

Anatomy & Axis Detail

Hip Joint, Left

The left hip joint is the ball-and-socket articulation on the opposite side of the pelvis, structurally identical to its right-sided counterpart but tracked as a distinct body part for coding purposes. Supplement procedures here reinforce existing joint structures with bone graft or synthetic material, addressing localized bone or cartilage deficiency, filling defects encountered during revision surgery, or augmenting a joint weakened by avascular necrosis or dysplasia, all without excising and replacing the joint surfaces entirely. As with the right hip, this code is distinguished from the acetabular-surface-specific body part used when augmentation is confined to the socket rather than the joint more broadly. Operative reports should specify laterality and the anatomic component reinforced, since these details determine which of several closely related hip joint codes applies.

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: Nonautologous Tissue Substitute

Nonautologous Tissue Substitute refers to biologic material sourced from a donor or another species, such as an allograft or xenograft, used to replace a body part. It differs from Autologous Tissue Substitute by tissue origin outside the patient's own body, and from Synthetic Substitute by being biologic rather than manufactured material.

Coding & Documentation

Coders assign Supplement when documentation shows material was added to reinforce an existing body part rather than substitute for it, which requires confirming the native structure was not removed. Graft type, whether autograft, allograft, or synthetic, factors into the device value. A recurring mistake is coding a ligament reconstruction as Repair when a formal graft was placed, or conversely coding Supplement when the graft actually replaced a joint surface rather than reinforcing intact tissue.

Commonly Confused With

RepairSupplement is most often confused with Repair, since both can appear in operative notes for ligament work; the distinction is whether material was grafted in to reinforce the structure versus simply resutured or tightened without added tissue.
ReplacementIt also borders Replacement when a graft is extensive enough to functionally substitute for the original structure rather than reinforce it.