041C0K4
Bypass Common Iliac Artery, Right to Renal Artery, Left with Nonautologous Tissue Substitute, Open Approach
Procedural Specifications
| Clinical Axis | Detail Definition |
|---|---|
| Section | 0 Medical and Surgical |
| Body System | 4 Lower Arteries |
| Operation | 1 Bypass |
| Body Part | C Common Iliac Artery, Right |
| Approach | 0 Open |
| Device | K Nonautologous Tissue Substitute |
| Qualifier | 4 Renal Artery, Left |
Operation Definition
Altering the route of passage of the contents of a tubular body part
Procedure Overview
Bypass procedures on the lower arteries create an alternate route for blood flow around a blocked or narrowed segment of an artery in the pelvis or legs, using either a graft made from the patient's own vein, a synthetic conduit, or another vessel repurposed for the route. The original diseased segment of the artery is left in place, and the new pathway carries blood around it to restore circulation to tissue downstream.
This surgery is most often performed to treat peripheral artery disease, where plaque buildup has significantly narrowed or blocked an artery in the leg and is causing pain, non-healing wounds, or tissue at risk of loss. Common examples include femoral-popliteal bypass and aortofemoral bypass, both of which reroute blood flow around blocked segments to preserve limb viability. Patients undergoing lower artery bypass typically have advanced atherosclerosis, often with a history of claudication, rest pain, or gangrene that has not responded to less invasive treatment.
Anatomy & Axis Detail
Common Iliac Artery, Right
The right common iliac artery arises from the aortic bifurcation and is a frequent site of occlusive disease affecting inflow to the entire right lower limb, making bypass here a means of restoring flow when angioplasty or stenting is not feasible or has failed, often in the setting of extensive aortoiliac calcification. A graft is constructed from the aorta or the contralateral iliac system to a patent point along or beyond the diseased right common iliac segment, sometimes as part of a larger aortobifemoral reconstruction. Laterality is essential to document accurately since the right and left common iliac arteries carry distinct body part values, and confusing them would misrepresent which limb's circulation was addressed, an important distinction for surgical planning and outcome tracking in aortoiliac disease.
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: 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.
Qualifier: Renal Artery, Left
Identifies the left renal artery as the site of intervention, paralleling the right-sided qualifier but applying strictly to left-kidney vascular anatomy. It is used for procedures such as balloon dilation for fibromuscular dysplasia or atherosclerotic renal artery stenosis. Choosing left versus right versus bilateral depends entirely on which vessel or vessels the operative report documents as treated.
Coding & Documentation
Coding a bypass procedure requires documentation identifying both the origin and the target of the new route, since the body part value captures where blood flow is coming from and the qualifier captures where it is being routed to. The operative note must also specify the type of conduit used, whether autologous vein, synthetic graft, or another vessel, since this determines the correct device value.
A common assignment error is failing to correctly identify the bypass target when a graft crosses multiple named arterial segments, leading to a code that reflects the wrong destination vessel. Coders also frequently miss that when a bypass procedure includes work on more than one arterial segment, such as a sequential bypass supplying multiple distal targets, each distinct bypass may need its own code rather than being captured under a single entry.