Athscl nonaut bio bypass of left leg w ulcer oth prt low leg

This code signifies the presence of atherosclerosis affecting a non-native biological bypass graft located in the left leg. This atherosclerotic process has led to the development of an ulceration on a part of the lower leg other than the ankle or foot. It indicates a complication of a previous bypass procedure using a biological graft.

Use this code when documentation explicitly states atherosclerosis within a biological bypass graft in the left leg, and an ulcer is present on the lower leg (excluding ankle/foot). This typically occurs in patients with a history of peripheral artery disease who have undergone bypass surgery using a biological graft, and are now experiencing graft failure or complication leading to tissue breakdown.

• Ensure the documentation specifies "nonautologous biological bypass graft" and not a synthetic or autologous graft.
• Verify the ulceration is on the "other part of lower leg" and not the ankle or foot, which have distinct codes.
• Sequence this code after any underlying peripheral artery disease or other conditions contributing to the atherosclerosis.