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

This code signifies hardening and narrowing of an existing bypass graft in the right leg, specifically affecting the calf region, which has led to the development of an open sore or ulcer. This condition indicates a failure or complication of a prior revascularization procedure in the lower extremity.

Apply this code when documentation confirms atherosclerosis impacting a bypass graft in the right leg, with a specific ulcer located on the calf. The medical record must clearly state the presence of a bypass graft, its location in the right leg, evidence of atherosclerotic changes within that graft, and an ulceration specifically of the calf.

• Ensure the documentation specifies "other type" of bypass graft if not otherwise specified (e.g., femoropopliteal, femorodistal).
• Verify the ulceration is explicitly documented as being on the calf, not just generally on the lower leg.
• Do not use this code for native vessel atherosclerosis or for ulcers not associated with a bypass graft.