Athscl unsp type bypass of the left leg w ulcer of ankle

This code describes a patient experiencing atherosclerosis, a hardening and narrowing of the arteries due to plaque buildup, specifically affecting an unspecified type of bypass graft in the left leg. The condition has progressed to include ulceration on the ankle, indicating significant tissue damage due to impaired blood flow.

Use this code when documentation clearly states atherosclerosis of a bypass graft in the left leg, with an associated ankle ulcer. This typically applies to patients with a history of peripheral artery disease who have undergone bypass surgery and are now presenting with graft failure and ischemic ulceration. Supporting documentation should include details of the graft, location of the ulcer, and confirmation of atherosclerotic changes.

• Ensure the documentation specifies "unspecified type" of bypass graft; if the graft type (e.g., femoropopliteal, femorotibial) is known, a more specific code should be used.
• Verify the laterality is explicitly stated as "left leg" and the ulceration is specifically of the "ankle."
• Do not confuse this with codes for native vessel atherosclerosis or ulcers not directly attributed to graft atherosclerosis.