G45.1: Carotid artery syndrome (hemispheric)


In outpatient care, the ICD code on medical documents is always appended with a diagnostic confidence indicator (A, G, V or Z): A (excluded diagnosis), G (confirmed diagnosis), V (tentative diagnosis) and Z (condition after a confirmed diagnosis).


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During a stroke some of the blood supply to part of the brain is cut off. This causes sudden severe headaches, paralysis or slurred speech.

Transient ischemic attack (TIA)

A transient ischemic attack often precedes a stroke. A TIA happens when part of the brain no longer gets enough blood supply. The symptoms are paralysis, visual impairment and slurred speech.