I70.64Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration

I70.64 is the ICD-10-CM diagnosis code for atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration. It belongs to category I70 (atherosclerosis), block I70-I79 (diseases of arteries, arterioles and capillaries) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

Within I70.6 (atherosclerosis of nonbiological bypass graft(s) of the extremities), I70.64 is specifically for atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration. Related codes cover unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities (I70.60), with intermittent claudication (I70.61), with rest pain (I70.62), atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration (I70.63), atherosclerosis of nonbiological bypass graft(s) of other extremity with ulceration (I70.65), with gangrene (I70.66) and other atherosclerosis of nonbiological bypass graft(s) of the extremities (I70.69).

To report this condition, pick the subcode that matches the documentation: I70.641 (of thigh), I70.642 (of calf), I70.643 (of ankle), I70.644 (of heel and midfoot), I70.645 (of other part of foot), I70.648 (of other part of lower leg) and I70.649 (of unspecified site).

Use an additional code to identify severity of ulcer (L97.-). Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and tobacco use (Z72.0).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.