Unsp athscl autol vein bypass of the extrm, bilateral legs

This code describes the hardening and narrowing of an autologous vein bypass graft in both legs due to atherosclerosis, where the specific type or location of the atherosclerosis within the graft is not documented. An autologous vein graft is a section of the patient's own vein used to bypass an occluded artery, typically in the lower extremities. This condition indicates a failure or compromise of the bypass due to disease progression within the graft itself.

Use this code when documentation indicates atherosclerosis affecting autologous vein bypass grafts in both lower extremities, but the physician has not specified the exact nature (e.g., native vessel, in situ, or other specific type) or precise location of the atherosclerosis within the graft. This code is appropriate when the documentation supports bilateral involvement and the graft type is confirmed as autologous vein.

• Ensure documentation explicitly states "autologous vein bypass graft" and "bilateral legs."
• Do not use if the type of atherosclerosis (e.g., native vessel, in situ) or the specific graft type is documented; more specific codes exist.
• Consider sequencing this code after a code for the underlying condition necessitating the bypass, if applicable and still active.