Skip to content
Dx

ICD-10-CM 2027 diagnosis code

I63.2Cerebral infarction due to unspecified occlusion or stenosis of precerebral arteries

Not billable — use a more specific code

I63.2 is a header code, so it can't be reported by itself. Choose one of the 5 more specific codes beneath it.Short description: Cerebral infrc due to unsp occls or stenosis of precerb art

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 I63.2

I63.2 is the ICD-10-CM diagnosis code for cerebral infarction due to unspecified occlusion or stenosis of precerebral arteries. It belongs to category I63 (cerebral infarction), 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 5 subcodes must be used instead.

Within I63, choose I63.2 (due to unspecified occlusion or stenosis of precerebral arteries) only when documentation doesn't support a more specific option: due to thrombosis of precerebral arteries (I63.0), due to embolism of precerebral arteries (I63.1), due to thrombosis of cerebral arteries (I63.3), due to embolism of cerebral arteries (I63.4), due to unspecified occlusion or stenosis of cerebral arteries (I63.5), due to cerebral venous thrombosis, nonpyogenic (I63.6), other cerebral infarction (I63.8) and unspecified (I63.9).

To report this condition, pick the subcode that matches the documentation: I63.20 (arteries), I63.21 (arteries), I63.22 (artery), I63.23 (arteries) and I63.29 (arteries).

Use an additional code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82). Use an additional code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-).

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 I63.2

Notes that apply from higher levels

Instructions written at a parent level also apply to I63.2.

› From I63 Cerebral infarction
Includes
  • occlusion and stenosis of cerebral and precerebral arteries, resulting in cerebral infarction
Excludes1
  • neonatal cerebral infarction (P91.82-)
Excludes2
  • chronic, without residual deficits (sequelae) (Z86.73)
  • sequelae of cerebral infarction (I69.3-)
Use additional code
  • code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82)
  • code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-)

Broader instructions also apply from I60-I69 Cerebrovascular diseases and Chapter 9: Diseases of the circulatory system.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to I63.2.

Codes whose notes reference I63.2

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about I63.2

Is I63.2 billable?

No. I63.2 is a header code. Report one of its more specific subcodes instead.