I70.4Atherosclerosis of autologous vein bypass graft(s) of the extremities

I70.4 is the ICD-10-CM diagnosis code for atherosclerosis of autologous vein bypass graft(s) of the extremities. 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 8 subcodes must be used instead.

Within I70 (atherosclerosis), I70.4 is specifically for atherosclerosis of autologous vein bypass graft(s) of the extremities. Related codes cover of aorta (I70.0), of renal artery (I70.1), of native arteries of the extremities (I70.2), of unspecified type of bypass graft(s) of the extremities (I70.3), of nonautologous biological bypass graft(s) of the extremities (I70.5), of nonbiological bypass graft(s) of the extremities (I70.6), of other type of bypass graft(s) of the extremities (I70.7), of other arteries (I70.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: I70.40 (extremities), I70.41 (with intermittent claudication), I70.42 (with rest pain), I70.43 (ulceration), I70.44 (ulceration), I70.45 (ulceration), I70.46 (with gangrene) and I70.49 (extremities).

Use an additional code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92). 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.