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

This code signifies the presence of atherosclerosis affecting a bypass graft in the left leg, specifically involving the calf region, and complicated by ulceration. It indicates a chronic, progressive narrowing or hardening of an arterial bypass graft due to plaque buildup, leading to impaired blood flow and tissue breakdown in the calf.

Apply this code when documentation clearly states atherosclerosis of a bypass graft in the left leg, with an ulcer located on the calf. This typically occurs in patients with a history of peripheral artery disease who have undergone bypass surgery and are now experiencing graft failure with ischemic ulceration.

• Ensure the documentation specifies "other type" of bypass graft if not otherwise specified (e.g., femoropopliteal, femorodistal).
• Verify the laterality (left leg) and the specific location of the ulceration (calf).
• Code any underlying peripheral artery disease or other contributing factors separately if documented.