Athscl autol vein bypass of the extrm w gangrene, right leg

This code signifies a severe form of peripheral artery disease affecting a patient's right leg, specifically involving an autologous vein bypass graft that has developed atherosclerosis. The presence of gangrene indicates tissue death due to critical ischemia, a serious complication of the graft's failure.

Use this code when documentation clearly states atherosclerosis of an autologous vein bypass graft in the right leg, accompanied by gangrene. This typically occurs in patients with a history of peripheral bypass surgery who are now experiencing graft failure and severe limb-threatening ischemia.

• Ensure the documentation specifies "autologous vein" graft, not synthetic or other types.
• Verify the laterality is explicitly "right leg" and that gangrene is present.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it's a co-morbidity impacting treatment.