Athscl nonaut bio bypass of the right leg w ulcer of thigh

This code describes the hardening and narrowing of a non-native, biological bypass graft located in the right leg, specifically when the condition has progressed to cause ulceration on the patient's thigh. This indicates a significant complication of a previous revascularization procedure using a biological conduit, leading to tissue breakdown.

Use this code for patients presenting with documented atherosclerosis affecting a biological bypass graft in the right leg, accompanied by an ulcer on the thigh. Documentation should clearly specify the graft type as "biological" (e.g., saphenous vein graft from a donor) and confirm the presence and location of the ulceration.

• Ensure the documentation specifies a "nonautologous biological" graft, not a synthetic or autologous one.
• Verify the ulceration is located on the thigh, as other locations would require a different code.
• Sequence this code first if it is the primary reason for the encounter, followed by codes for associated conditions or complications.