Athscl type of bypass of the extrm w gangrene, unsp extrm

This code signifies a severe complication of peripheral artery disease where an existing bypass graft in an extremity has developed atherosclerosis, leading to tissue death (gangrene). It specifically applies when the affected extremity is not specified, and the bypass graft is of a type other than autologous vein or nonautologous biological.

Use this code when documentation clearly indicates atherosclerosis within a bypass graft (not specified as autologous vein or nonautologous biological) in an extremity, and gangrene is present. This typically occurs in patients with advanced peripheral vascular disease who have undergone prior revascularization procedures. Supporting documentation would include operative reports, vascular studies, and physician notes detailing the graft type, location, and presence of gangrene.

• Ensure the documentation specifies "other type" of bypass graft and the presence of gangrene.
• Do not use this code if the graft type is specified as autologous vein (I70.71-) or nonautologous biological (I70.73-).
• Always sequence this code after the underlying peripheral artery disease (e.g., I70.2-).