Atheroembolism of left lower extremity

This code signifies the presence of an atheroembolism affecting the left lower extremity. This condition occurs when cholesterol crystals or other atherosclerotic debris break off from an atherosclerotic plaque, typically in a larger artery, and travel downstream to occlude smaller arteries in the left leg. This can lead to acute ischemia and tissue damage.

Use this code when documentation clearly indicates an atheroembolic event specifically impacting the left lower extremity. This diagnosis is often supported by findings such as "blue toe syndrome," livedo reticularis, or acute limb ischemia in the absence of a large vessel thrombus, particularly in patients with known severe atherosclerosis.

• Ensure the documentation specifies "atheroembolism" and not just a general arterial embolism or thrombosis.
• Verify the laterality is explicitly stated as "left lower extremity" to avoid using an unspecified or right-sided code.
• Consider sequencing this code with a code for the underlying atherosclerosis (e.g., I70.2- series) if documented.