Athscl type of bypass graft(s) of extremity w ulceration

This code signifies the presence of atherosclerosis affecting a bypass graft in an extremity other than the lower limbs, which has led to the development of an ulcer. It indicates a chronic and progressive hardening and narrowing of the graft due to plaque buildup, complicated by tissue breakdown.

Use this code when documentation specifies atherosclerosis within a bypass graft located in an upper extremity, head, or neck, and an associated ulcer is present. This typically applies to patients with a history of peripheral artery disease who have undergone bypass surgery in these non-lower extremity locations.

• Ensure documentation clearly specifies the type of bypass graft (e.g., femoropopliteal, aortobifemoral) and its location (e.g., upper extremity, carotid).
• Verify the presence and location of the ulcer, as this is a key component of the code.
• Do not use this code for atherosclerosis of native arteries or bypass grafts in the lower extremities.