ICD-10-CM > I00-I99 > I60-I69 > I67 > I67.8 > I67.84 I67.84 Cerebral vasospasm and vasoconstriction Non-Billable/Non-Specific Codes I67.841Reversible cerebrovascular vasoconstriction syndromeI67.848Other cerebrovascular vasospasm and vasoconstriction