041E0KB
Bypass Internal Iliac Artery, Right to Internal Iliac 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 | E Internal Iliac Artery, Right |
| Approach | 0 Open |
| Device | K Nonautologous Tissue Substitute |
| Qualifier | B Internal Iliac 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
Internal Iliac Artery, Right
The right internal iliac artery, also called the hypogastric artery, supplies the pelvic viscera, gluteal muscles, and contributes to collateral circulation supporting the lower limb when other vessels are diseased, so bypass targeting it is less common than for the external iliac or femoral arteries and is typically reserved for pelvic ischemia, buttock claudication, or as part of a staged reconstruction preserving pelvic perfusion. Its deep pelvic location and numerous branches to bladder, rectum, and reproductive structures make isolated bypass technically challenging and less frequently indicated than embolization or stenting for this vessel. When performed, the graft connects a patent inflow source to the internal iliac artery beyond the point of disease, and documentation should reflect that pelvic, not limb, perfusion is the primary goal on the right side.
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: Internal Iliac Artery, Left
Identifies the left internal iliac artery, supplying pelvic structures, as the treated vessel in interventions such as embolization for postpartum hemorrhage or pelvic vascular malformation. It parallels the right-sided qualifier in anatomic role but applies only to left-side procedures, and it remains distinct from the External Iliac Artery, which feeds the lower limb rather than the pelvis.
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.