Unsp athscl unsp type bypass of the extrm, bilateral legs

This code signifies the presence of atherosclerosis within a bypass graft in both lower extremities, where the specific type of atherosclerosis and the type of bypass graft are not documented. It indicates a hardening and narrowing of these grafted vessels due to plaque buildup, affecting blood flow to the legs.

Use this code when documentation confirms atherosclerosis in bypass grafts of both legs, but the physician's notes do not specify the exact type of atherosclerosis (e.g., native vessel, in situ vein, synthetic) or the precise type of bypass graft (e.g., femoropopliteal, femorodistal). This code is appropriate when the laterality is clearly bilateral, and the specific details of the graft or atherosclerosis are unknown or unstated.

• Ensure documentation explicitly states "bilateral legs" and "bypass graft(s)" to support this code.
• Avoid using this code if the type of atherosclerosis (e.g., native artery, autologous vein) or the specific graft type is documented; instead, select a more specific I70.3 subcategory.
• Do not use this code for atherosclerosis of native arteries of the extremities; refer to codes in the I70.2- or I70.4- categories for those conditions.