Athscl type of bypass of the extrm w gangrene, bi legs

This code signifies a severe form of peripheral artery disease where atherosclerosis has developed within a previously implanted bypass graft in both lower extremities, leading to tissue death (gangrene). This indicates a failure or significant compromise of the revascularization procedure due to progressive arterial hardening within the graft itself.

Use this code when documentation clearly states atherosclerosis affecting bypass grafts in both legs, specifically identifying gangrene as a complication. This typically applies to patients with advanced peripheral vascular disease who have undergone prior bypass surgery and are now experiencing critical limb ischemia with tissue loss.

• Ensure documentation specifies "atherosclerosis" of the "bypass graft" and not the native vessel.
• Confirm the presence of "gangrene" and that it affects "bilateral legs" for accurate code assignment.
• Code also any associated underlying conditions, such as diabetes mellitus, which often contributes to atherosclerosis and gangrene.