Athscl type of bypass of the left leg w ulceration of ankle

This code signifies the presence of atherosclerosis affecting a bypass graft in the left leg, specifically when the condition has progressed to cause ulceration on the ankle. It indicates a complication of peripheral artery disease where a previously placed graft, designed to bypass an occluded artery, has now developed atherosclerotic changes, leading to tissue breakdown.

Use this code when documentation clearly states atherosclerosis of a bypass graft in the left leg, accompanied by an ankle ulcer. This typically occurs in patients with a history of peripheral bypass surgery who subsequently develop graft failure due to plaque buildup and ischemic complications. Supporting documentation should include operative reports of the bypass, imaging studies confirming graft atherosclerosis, and physical exam findings describing the ankle ulcer.

• Ensure the documentation specifies "other type" of bypass graft; if the graft type is known (e.g., femoropopliteal), a more specific code may be available.
• Verify the laterality is explicitly stated as "left leg" and the ulceration is at the "ankle."
• Consider sequencing this code after codes for the underlying peripheral artery disease, if applicable, and before codes for any associated infections of the ulcer.