Unsp athscl unsp type bypass of the extremities, right leg

This code signifies the presence of atherosclerosis within a bypass graft located in the right leg, where the specific type of atherosclerosis (e.g., native vessel, in situ) and the exact type of bypass graft (e.g., femoropopliteal, aortobifemoral) are not documented. It indicates a hardening and narrowing of the graft due to plaque buildup, impairing blood flow to the extremity.

Use this code when documentation confirms atherosclerosis affecting a bypass graft in the right leg, but lacks specificity regarding the graft type or the nature of the atherosclerotic process within the graft. This applies to patients presenting with symptoms of peripheral artery disease (PAD) in the right leg, where imaging or clinical findings identify graft stenosis or occlusion due to atherosclerosis, but further details are unavailable.

• Avoid using this code if the type of bypass graft (e.g., autologous vein, synthetic) or the specific location within the right leg (e.g., femoral-popliteal) is documented; more specific codes exist.
• Ensure documentation clearly states "atherosclerosis" and "bypass graft" in the "right leg" to support this code.
• Consider sequencing this code after codes for the underlying peripheral artery disease if applicable, or as a primary diagnosis if the graft atherosclerosis is the primary reason for the encounter.