Athscl nonaut bio bypass of extrm w intrmt claud, right leg

This code signifies the hardening and narrowing of a non-native biological bypass graft in the right leg, leading to symptomatic leg pain with exercise that resolves with rest (intermittent claudication). This condition indicates a failure or compromise of a previously implanted biological graft, such as a cadaveric vein, used to bypass an occluded artery in the extremity.

Use this code when documentation clearly states atherosclerosis affecting a biological bypass graft in the right leg, specifically noting the presence of intermittent claudication. This typically occurs in patients who have undergone prior revascularization procedures for peripheral artery disease using a non-autologous biological conduit. Supporting documentation includes physician notes detailing the graft type, location, and the patient's symptoms.

• Ensure the documentation specifies "nonautologous biological" graft; do not use for synthetic grafts or autologous grafts.
• Confirm the laterality is "right leg" and that intermittent claudication is explicitly documented as the symptom.
• Distinguish from native vessel atherosclerosis (I70.2- series) or atherosclerosis of autologous bypass grafts (I70.3- series).