Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene

**Includes:** - any condition classifiable to I70.51-, I70.52-, and I70.53-, I70.54-, I70.55 - chronic limb-threatening ischemia of nonautologous biological bypass graft(s) of the extremities with gangrene - critical limb ischemia of nonautologous biological bypass graft(s) of the extremities with gangrene

**Use additional code:** - code to identify the severity of any ulcer (L97.-, L98.49-), if applicable