Athscl native arteries of right leg w ulceration of calf

This code signifies peripheral artery disease (PAD) affecting the native arteries of the right leg, specifically characterized by atherosclerosis. A key component is the presence of an ulceration located on the calf, indicating a severe manifestation of the arterial insufficiency.

Apply this code when documentation explicitly states atherosclerosis of the native arteries in the right leg with an associated ulceration of the calf. This is typically seen in patients with chronic limb ischemia or advanced PAD. Supporting documentation should include physical exam findings describing the ulcer's location and characteristics, and diagnostic imaging confirming arterial atherosclerosis.

• Ensure the ulceration is specifically documented as being on the calf of the right leg.
• Distinguish from ulcerations due to venous insufficiency or diabetic foot ulcers, which have different code assignments.
• Code any associated gangrene or rest pain separately if present and documented.