Athscl native arteries of left leg w ulceration of unsp site

This code signifies a hardening and narrowing of the native arteries in the patient's left leg, specifically due to atherosclerosis, which has led to the development of an ulcer. The ulcer's precise location on the left leg is not specified in the medical record. This condition impairs blood flow, potentially causing pain, non-healing wounds, and tissue damage.

Apply this code when documentation clearly indicates atherosclerosis affecting the native arteries of the left lower extremity, accompanied by an ulcer where the specific anatomical site of the ulcer (e.g., ankle, foot, calf) is not documented. This is typically seen in patients with peripheral artery disease (PAD) and chronic non-healing wounds.

• Ensure documentation specifies "native arteries" and not a bypass graft.
• Confirm the laterality is explicitly "left leg."
• If the ulcer site is documented (e.g., ankle, foot, heel), a more specific code from the I70.24- series should be used.