Athscl native arteries of extremities w gangrene, right leg

This code signifies the presence of atherosclerosis affecting the native arteries of the right lower extremity, complicated by tissue necrosis (gangrene). It indicates a severe stage of peripheral artery disease where compromised blood flow has led to irreversible tissue damage in the right leg.

This code is appropriate when documentation clearly states atherosclerosis of the native arteries in the right leg with evidence of gangrene. This typically occurs in patients with advanced peripheral artery disease presenting with non-healing ulcers, blackening of tissue, or other signs of tissue death in the right lower extremity.

• Ensure documentation specifies "native arteries" and not bypass grafts.
• Laterality (right leg) is crucial for accurate code assignment.
• Always code the underlying atherosclerosis first, then any associated complications like gangrene.