Atheroembolism of bilateral lower extremities

This code signifies the presence of atheroembolic disease affecting both lower limbs. It describes a condition where cholesterol crystals or atheromatous debris from a proximal atherosclerotic plaque dislodge and embolize, obstructing smaller arteries in the legs and feet. This can lead to ischemia, tissue damage, and potentially gangrene.

Use this code when documentation clearly indicates atheroembolism as the cause of symptoms in both lower extremities, such as "blue toe syndrome," livedo reticularis, or ischemic ulcers. This diagnosis is typically supported by clinical presentation, imaging studies (e.g., angiography showing distal occlusions without proximal source), and sometimes biopsy findings.

• Ensure documentation specifies bilateral involvement; otherwise, use a unilateral code (I75.021 or I75.022).
• Distinguish from other embolic events (e.g., cardiac emboli) or primary atherosclerotic peripheral artery disease.
• Code any associated complications, such as gangrene (I96) or ulcers (L97.-), as secondary diagnoses.