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

This code signifies atherosclerosis affecting a bypass graft in the left leg, where the specific type of graft (e.g., femoropopliteal, femorodistal) is not documented. A key feature is the presence of an ulceration specifically located on the calf, indicating a severe manifestation of the atherosclerotic process and compromised tissue integrity.

Use this code when documentation clearly states atherosclerosis of a bypass graft in the left leg, the graft type is not specified, and there is an associated ulceration of the calf. This typically applies to patients with peripheral artery disease who have undergone bypass surgery and subsequently developed graft failure with skin breakdown. Documentation should specify "left leg," "bypass graft," "atherosclerosis," and "calf ulcer."

• Ensure the documentation specifies "left leg" and "calf" for the ulceration; otherwise, a more general code may be appropriate.
• If the type of bypass graft (e.g., femoropopliteal, popliteal-tibial) is known, a more specific code within the I70.3- series should be used.
• Code also any associated infections of the ulcer (e.g., L97.31- for non-pressure chronic ulcer of left lower limb with other specified severity).