Athscl nonaut bio bypass of the right leg w ulcer of ankle

This code signifies the presence of atherosclerosis affecting a non-native biological bypass graft located in the right leg, specifically complicated by ulceration at the ankle. This indicates a failure or compromise of the bypass graft due to plaque buildup, leading to tissue breakdown in the distal extremity.

Apply this code when documentation confirms atherosclerosis within a biological bypass graft (e.g., saphenous vein graft) in the right leg, and there is a documented ankle ulcer directly attributable to this graft pathology. This typically occurs in patients with a history of peripheral artery disease who have undergone bypass surgery.

• Ensure the documentation specifies "nonautologous biological" graft; differentiate from synthetic or autologous grafts.
• Verify the laterality (right leg) and the specific complication (ulceration of ankle).
• Code also any underlying peripheral artery disease (e.g., I70.2- series) if still present and contributing to the overall clinical picture.