Athscl type of bypass of the left leg w ulceration of thigh

This code signifies the presence of atherosclerosis affecting a bypass graft in the left leg, specifically involving a graft type other than autologous vein or nonautologous biological. The condition is complicated by an ulceration located on the patient's thigh. This indicates a chronic and progressive narrowing of the bypass graft lumen due to plaque buildup, leading to impaired blood flow and subsequent tissue breakdown.

Use this code when documentation clearly states atherosclerosis of a "different type" of bypass graft (e.g., synthetic graft) in the left leg, accompanied by an ulcer on the thigh. This applies to patients experiencing graft failure or complications due to atherosclerotic changes in a previously placed bypass. Supporting documentation should specify the graft material (if known to be other than autologous vein or nonautologous biological), the leg affected, and the presence and location of the ulcer.

• Ensure the documentation specifies "other type" of bypass graft; otherwise, consider codes for autologous vein (I70.71-) or nonautologous biological (I70.72-) grafts.
• Verify the ulceration is specifically on the thigh, as other ulcer locations would require a different fourth character.
• Always sequence this code after any underlying systemic conditions contributing to the atherosclerosis, if applicable.