Athscl nonbiol bypass of the left leg w ulceration of ankle

This code signifies the presence of atherosclerosis affecting a non-biological (synthetic) bypass graft located in the left leg, specifically complicated by ulceration at the ankle. It indicates a chronic, progressive hardening and narrowing of the artificial vessel, leading to impaired blood flow and tissue breakdown in the distal extremity.

Use this code when documentation clearly states atherosclerosis of a synthetic bypass graft in the left lower extremity, accompanied by an ankle ulcer. This typically occurs in patients with a history of peripheral artery disease who have undergone bypass surgery with a prosthetic graft and are now experiencing graft failure and ischemic ulceration.

• Ensure the documentation specifies "nonbiological" or "synthetic" graft; otherwise, a different code for biological grafts would be appropriate.
• Verify the laterality (left leg) and the specific location of the ulceration (ankle).
• Code any underlying peripheral artery disease or other contributing factors separately, if documented.