ICD-10-CM 2027 diagnosis code
I67.85Hereditary cerebrovascular diseases
I67.85 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.
Code last changed in FY2019 (effective October 1, 2018). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About I67.85
I67.85 is the ICD-10-CM diagnosis code for hereditary cerebrovascular diseases. 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), I67.85 is specifically for hereditary cerebrovascular diseases. Related codes cover acute cerebrovascular insufficiency (I67.81), cerebral ischemia (I67.82), posterior reversible encephalopathy syndrome (I67.83), cerebral vasospasm and vasoconstriction (I67.84) and other cerebrovascular disease (I67.89).
To report this condition, pick the subcode that matches the documentation: I67.850 (leukoencephalopathy) and I67.858 (disease).
It was added in FY2019, effective October 1, 2018.
Specific codes under I67.85
Notes that apply from higher levels
Instructions written at a parent level also apply to I67.85.
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
- FY2019 (effective 10/1/2018): Added
- No changes since FY2019.
Common questions about I67.85
Is I67.85 billable?
- No. I67.85 is a header code. Report one of its more specific subcodes instead.