Unsp athscl type of bypass of the extrm, bilateral legs

This code signifies the presence of atherosclerosis affecting a bypass graft in both lower extremities, where the specific type of bypass graft (e.g., femoropopliteal, aortobifemoral) is not documented. It indicates a hardening and narrowing of the arteries within the graft itself, impairing blood flow to the legs.

This code is appropriate when documentation confirms atherosclerosis of a bypass graft in both legs, but the precise anatomical location or type of the graft is not specified. It is used when a patient presents with symptoms of peripheral artery disease (PAD) in the context of prior bypass surgery, and imaging or clinical findings indicate graft occlusion or stenosis due to atherosclerosis.

• Ensure documentation explicitly states "bilateral legs" and "unspecified type of bypass graft" to support this code.
• Avoid using this code if the specific type of bypass graft (e.g., native artery, synthetic, autologous vein) is known and documented; instead, use a more specific code from the I70.7- series.
• Sequence this code after any underlying conditions, such as peripheral artery disease, that may have led to the need for the bypass graft.