ICD-10-PCS Billable Code

04RL4KZ

Replacement Femoral Artery, Left to No Qualifier with Nonautologous Tissue Substitute, Percutaneous Endoscopic Approach

Procedural Specifications

Clinical Axis Detail Definition
Section0 Medical and Surgical
Body System4 Lower Arteries
OperationR Replacement
Body PartL Femoral Artery, Left
Approach4 Percutaneous Endoscopic
DeviceK Nonautologous Tissue Substitute
QualifierZ 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

Replacement procedures in the lower arteries involve taking out a diseased or damaged arterial segment and putting in synthetic graft material or biological tissue to physically stand in for that piece of vessel. This is distinct from simply patching or reinforcing an artery, since the native segment is functionally substituted rather than preserved and bolstered.

A classic example is an aortobifemoral or femoral-popliteal graft placed after removing a severely diseased, occluded, or aneurysmal segment of artery, using a synthetic conduit such as Dacron or PTFE, or in some cases a harvested vein used as a full segmental replacement. Patients typically arrive at this procedure after conservative management or angioplasty has failed, or when an aneurysm poses a rupture risk that mandates excising the weakened wall.

Anatomy & Axis Detail

Femoral Artery, Left

The left femoral artery extends the external iliac artery into the thigh and serves as the origin for much of the blood supply to the left lower extremity, while also functioning as a common access point for vascular and cardiac procedures performed from the left groin. Segmental replacement is generally undertaken for extensive atherosclerotic occlusion, degenerative aneurysm, or vessel damage following catheterization or trauma, conditions that can otherwise lead to claudication, tissue loss, or acute ischemia in the leg. Surgeons remove the compromised portion of the artery and insert a synthetic or autologous graft to restore the arterial pathway toward the popliteal artery. Because this vessel is superficial and frequently manipulated during endovascular procedures, precise documentation distinguishing a true replacement from a patch repair or adjunctive bypass is important for accurate coding.

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

The operative report must clearly establish that a segment of native artery was excised or its function replaced, and that a graft or biological material took its place, distinguishing this from Bypass, where the diseased segment is left in place and a new route is constructed around it. Coders should identify the specific arterial body part value replaced and the device value representing the graft material, whether autologous, nonautologous, or synthetic.

A common error is coding a bypass graft as a Replacement when the original artery segment was left intact and simply routed around; another is failing to capture the correct device value when a combination of graft materials was used in a single reconstruction.

Commonly Confused With

BypassBypass is the procedure most often mixed up with Replacement because both use graft material, but Bypass creates an alternate route while leaving the native, diseased vessel in place, whereas Replacement removes the native segment outright.
SupplementSupplement can also be confused with Replacement when a graft is used to reinforce rather than substitute for a vessel wall; if the native artery remains and the graft simply adds strength or bulk, Supplement is the correct root operation instead.