Multiple and bilateral precerebral artery syndromes

This code signifies a cerebrovascular condition affecting multiple arteries supplying blood to the brain, specifically those located before the brain (precerebral), and involving both sides of the body. It indicates a syndrome characterized by symptoms arising from compromised blood flow in these arteries, such as transient ischemic attacks (TIAs) or stroke-like symptoms.

Use this code when documentation clearly indicates a diagnosis of multiple and bilateral precerebral artery syndromes, often presenting with recurrent or fluctuating neurological deficits. Supporting documentation should specify involvement of more than one precerebral artery (e.g., carotid and vertebral arteries) and bilateral presentation.

• Ensure documentation specifies "multiple" and "bilateral" involvement of precerebral arteries; otherwise, a more specific code for a single artery or unilateral involvement may be appropriate.
• Distinguish from intracranial artery syndromes (I67.-) which involve arteries within the brain.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis when it contributes to the patient's overall condition.