any condition classifiable to I70.51- chronic limb-threatening ischemia NOS of nonautologous biological bypass graft(s) of the extremities chronic limb-threatening ischemia of nonautologous biological bypass graft(s) of the extremities with rest pain critical limb ischemia NOS of nonautologous biological bypass graft(s) of the extremities critical limb ischemia of nonautologous biological bypass graft(s) of the extremities with rest pain |