Unsp athscl type of bypass of the extremities, left leg

This code indicates the presence of hardening and narrowing of an unspecified type of bypass graft in the left leg, without further specification of the graft type or the presence of complications like occlusion or gangrene. It signifies a chronic, progressive disease affecting a previously implanted vascular conduit in the lower extremity.

Use this code when documentation confirms atherosclerosis of a bypass graft in the left leg, but the specific type of graft (e.g., femoropopliteal, femorodistal) is not specified, and there is no mention of occlusion, inflammation, or ulceration. This code is appropriate for follow-up appointments or when the graft type is unknown at the time of coding.

• Do not use this code if the specific type of bypass graft (e.g., autologous vein, nonautologous biological, synthetic) is documented; instead, choose a more specific code from the I70.7- series.
• Ensure documentation clearly specifies the left leg; otherwise, an unspecified laterality code should be used.
• Always look for documentation of complications like occlusion, gangrene, or ulceration, as these require more specific codes.