Athscl native arteries of left leg w ulceration of calf

This code signifies the hardening and narrowing of the native arteries in the left lower extremity, specifically in the calf region, which has led to the formation of an open sore or lesion. This condition is a manifestation of peripheral artery disease (PAD) affecting the left leg, complicated by tissue breakdown.

Use this code when documentation clearly indicates atherosclerosis of the left leg's native arteries, with a specific mention of an ulcer located on the calf. This typically occurs in patients with advanced PAD where compromised blood flow has resulted in ischemic ulceration. Supporting documentation would include physician notes detailing the location of the ulcer, the affected leg, and the underlying atherosclerotic disease.

• Ensure the documentation specifies "native arteries" and not a bypass graft.
• Verify the ulcer's location is precisely on the "calf" of the left leg.
• Always sequence this code first when the ulceration is the primary reason for the encounter, followed by codes for any associated risk factors or complications.