Atherosclerosis of autologous vein bypass graft(s) of the extremities with gangrene

**Includes:** - any condition classifiable to I70.41-, I70.42-, and I70.43-, I70.44-, I70.45 - chronic limb-threatening ischemia of autologous vein bypass graft(s) of the extremities with gangrene - critical limb ischemia of autologous vein bypass graft(s) of the extremities with gangrene

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