Atherosclerosis of nonautologous biological bypass graft(s) of the left leg with ulceration

**Includes:** - any condition classifiable to I70.512 and I70.522 - chronic limb-threatening ischemia of nonautologous biological bypass graft(s) of the left leg with ulceration - critical limb ischemia of nonautologous biological bypass graft(s) of the left leg with ulceration

**Use additional code:** - code to identify severity of ulcer (L97.-)