ICD-10-CM > I00-I99 > I60-I69 > I67 > I67.8 I67.8 Other specified cerebrovascular diseases Non-Billable/Non-Specific Codes I67.81Acute cerebrovascular insufficiencyI67.82Cerebral ischemiaI67.83Posterior reversible encephalopathy syndromeI67.84Cerebral vasospasm and vasoconstrictionI67.841Reversible cerebrovascular vasoconstriction syndromeI67.848Other cerebrovascular vasospasm and vasoconstrictionI67.85Hereditary cerebrovascular diseasesI67.850Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathyI67.858Other hereditary cerebrovascular diseaseI67.89Other cerebrovascular disease