I67.1: Cerebral aneurysm and cerebral arteriovenous fistula


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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Brain aneurysm

A brain aneurysm is a bulge in an artery in the brain. This often goes unnoticed without causing symptoms. If the aneurysm ruptures, it may cause a life-threatening brain hemorrhage.