Athscl native arteries of extremities w ulceration

This code signifies peripheral artery disease (PAD) affecting the native arteries of the extremities, excluding the lower legs, that has progressed to tissue loss in the form of an ulcer. It indicates a severe manifestation of atherosclerosis in non-lower leg peripheral arteries, such as those in the arms or feet (excluding the calf/shin area).

Apply this code when documentation clearly states atherosclerosis of an extremity artery (e.g., brachial, radial, pedal, but not tibial/peroneal) with an associated ulcer. This is typically seen in patients with advanced PAD where blood flow is significantly compromised, leading to non-healing wounds. Supporting documentation should specify the affected extremity and the presence of ulceration due to the atherosclerotic process.

• Ensure the documentation specifies "native arteries" and not bypass grafts, as different codes apply to graft involvement.
• Confirm the ulceration is directly attributed to the atherosclerosis; other causes of ulceration (e.g., venous stasis, pressure) would require different codes.
• Always code the specific site of the ulcer if documented, using an additional code from the L97 series (e.g., L97.411 for non-pressure chronic ulcer of right heel and midfoot with necrosis).