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

This code signifies the presence of atherosclerosis affecting a bypass graft in the left leg, where the specific type of graft is not documented. A key feature is the development of an ulceration, the precise location of which is also unspecified. This indicates a complication of peripheral artery disease treated with bypass surgery.

Use this code when documentation clearly indicates atherosclerosis within a bypass graft of the left leg, accompanied by an ulcer. The code is appropriate when the type of bypass graft (e.g., femoropopliteal, femorotibial) and the exact site of the ulceration are not specified in the medical record. This code is often used in patients with chronic limb ischemia post-revascularization.

• Ensure documentation specifies "left leg" and "bypass graft" with evidence of atherosclerosis and ulceration.
• If the type of bypass graft or the ulcer site is known, a more specific code from the I70.3- series should be used.
• Always code any associated underlying conditions, such as diabetes mellitus, which can contribute to atherosclerosis and ulcer formation.