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

This code signifies the presence of atherosclerosis affecting a non-native biological bypass graft in the right leg, specifically complicated by ulceration on a part of the lower leg other than the ankle or heel. This indicates a failure or deterioration of the bypass graft due to plaque buildup, leading to tissue breakdown.

Use this code when documentation clearly states atherosclerosis of a non-autologous biological bypass graft in the right lower extremity, accompanied by an ulceration on the lower leg (excluding ankle/heel). This typically applies to patients with peripheral artery disease who have undergone bypass surgery using a xenograft or allograft, and are now experiencing graft failure with skin breakdown.

• Ensure the documentation specifies "nonautologous biological" graft; do not use for synthetic grafts or autologous grafts.
• Verify the laterality is "right leg" and the ulceration is on the "other part of lower leg" (e.g., calf, shin) to differentiate from ankle/heel ulcers.
• Sequence this code as a primary diagnosis when the atherosclerosis and ulceration are the reason for the encounter, or as a secondary diagnosis when managing other conditions.