ICD-10-CM 2027 diagnosis code
I67.84Cerebral vasospasm and vasoconstriction
I67.84 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About I67.84
I67.84 is the ICD-10-CM diagnosis code for cerebral vasospasm and vasoconstriction. It belongs to category I67 (other cerebrovascular diseases), block I60-I69 (cerebrovascular diseases) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.
Within I67.8 (other specified cerebrovascular diseases), I67.84 is specifically for cerebral vasospasm and vasoconstriction. Related codes cover acute cerebrovascular insufficiency (I67.81), cerebral ischemia (I67.82), posterior reversible encephalopathy syndrome (I67.83), hereditary cerebrovascular diseases (I67.85) and other cerebrovascular disease (I67.89).
To report this condition, pick the subcode that matches the documentation: I67.841 (syndrome) and I67.848 (vasoconstriction).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under I67.84
Notes that apply from higher levels
Instructions written at a parent level also apply to I67.84.
Broader instructions also apply from I60-I69 Cerebrovascular diseases and Chapter 9: Diseases of the circulatory system.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about I67.84
Is I67.84 billable?
- No. I67.84 is a header code. Report one of its more specific subcodes instead.