2026 ICD-10-CM Diagnosis Code I63Cerebral infarction

ICD-10-CM Codes›I00–I99›I60-I69›I63

ICD-10-CM I63
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I63 is a non-billable ICD-10-CM category code for cerebral infarction, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I63.00, I63.011, I63.012, and I63.013.

Code Identity

ICD-10-CM Code
I63
Billable Status
No — Non-Billable Category
Code Describes
Cerebral infarction
Chapter
I60-I69
Cerebrovascular diseases

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI60-I69Cerebrovascular diseases
CategoryI63Cerebral infarction
This CodeI63Cerebral infarction

Specific Coding for Cerebral infarctionOverview

Non-specific codes like I63 require more characters. Use one of these billable codes instead:

  • I63.0 for Cerebral infarction due to thrombosis of precerebral arteries

  • Use I63.00 for Cerebral infarction due to thrombosis of unspecified precerebral artery

  • I63.01 for Cerebral infarction due to thrombosis of vertebral artery

  • Use I63.02 for Cerebral infarction due to thrombosis of basilar artery

  • I63.03 for Cerebral infarction due to thrombosis of carotid artery

  • Use I63.09 for Cerebral infarction due to thrombosis of other precerebral artery

  • I63.1 for Cerebral infarction due to embolism of precerebral arteries

  • Use I63.10 for Cerebral infarction due to embolism of unspecified precerebral artery

  • I63.11 for Cerebral infarction due to embolism of vertebral artery

  • Use I63.12 for Cerebral infarction due to embolism of basilar artery

  • I63.13 for Cerebral infarction due to embolism of carotid artery

  • Use I63.19 for Cerebral infarction due to embolism of other precerebral artery

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

  • Use I63.20 for Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries

  • I63.21 for Cerebral infarction due to unspecified occlusion or stenosis of vertebral arteries

  • Use I63.22 for Cerebral infarction due to unspecified occlusion or stenosis of basilar artery

  • I63.23 for Cerebral infarction due to unspecified occlusion or stenosis of carotid arteries

  • Use I63.29 for Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries

  • I63.3 for Cerebral infarction due to thrombosis of cerebral arteries

  • Use I63.30 for Cerebral infarction due to thrombosis of unspecified cerebral artery

  • I63.31 for Cerebral infarction due to thrombosis of middle cerebral artery

  • I63.32 for Cerebral infarction due to thrombosis of anterior cerebral artery

  • I63.33 for Cerebral infarction due to thrombosis of posterior cerebral artery

  • I63.34 for Cerebral infarction due to thrombosis of cerebellar artery

  • Use I63.39 for Cerebral infarction due to thrombosis of other cerebral artery

  • I63.4 for Cerebral infarction due to embolism of cerebral arteries

  • Use I63.40 for Cerebral infarction due to embolism of unspecified cerebral artery

  • I63.41 for Cerebral infarction due to embolism of middle cerebral artery

  • I63.42 for Cerebral infarction due to embolism of anterior cerebral artery

  • I63.43 for Cerebral infarction due to embolism of posterior cerebral artery

  • I63.44 for Cerebral infarction due to embolism of cerebellar artery

  • Use I63.49 for Cerebral infarction due to embolism of other cerebral artery

  • I63.5 for Cerebral infarction due to unspecified occlusion or stenosis of cerebral arteries

  • Use I63.50 for Cerebral infarction due to unspecified occlusion or stenosis of unspecified cerebral artery

  • I63.51 for Cerebral infarction due to unspecified occlusion or stenosis of middle cerebral artery

  • I63.52 for Cerebral infarction due to unspecified occlusion or stenosis of anterior cerebral artery

  • I63.53 for Cerebral infarction due to unspecified occlusion or stenosis of posterior cerebral artery

  • I63.54 for Cerebral infarction due to unspecified occlusion or stenosis of cerebellar artery

  • Use I63.59 for Cerebral infarction due to unspecified occlusion or stenosis of other cerebral artery

  • Use I63.6 for Cerebral infarction due to cerebral venous thrombosis, nonpyogenic

  • I63.8 for Other cerebral infarction

  • Use I63.81 for Other cerebral infarction due to occlusion or stenosis of small artery

  • Use I63.89 for Other cerebral infarction

  • Use I63.9 for Cerebral infarction, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • occlusion and stenosis of cerebral and precerebral arteries, resulting in cerebral infarction

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

Type 1 Excludes

  • neonatal cerebral infarction P91.82

Type 2 Excludes

  • chronic, without residual deficits sequelae Z86.73
  • sequelae of cerebral infarction I69.3

Clinical InformationClinical

  • Cerebral Infarction

    the formation of an area of necrosis in the cerebrum caused by an insufficiency of arterial or venous blood flow. infarcts of the cerebrum are generally classified by hemisphere (i.e., left vs. right), lobe (e.g., frontal lobe infarction), arterial distribution (e.g., infarction, anterior cerebral artery), and etiology (e.g., embolic infarction).

  • Infarction, Middle Cerebral Artery

    necrosis occurring in the middle cerebral artery distribution system which brings blood to the entire lateral aspects of each cerebral hemisphere. clinical signs include impaired cognition; aphasia; agraphia; weak and numbness in the face and arms, contralaterally or bilaterally depending on the infarction.

Patient EducationClinical

Ischemic Stroke

A stroke happens when there is a loss of blood flow to part of the brain. Your brain cells cannot get the oxygen and nutrients they need from blood, and they start to die within a few minutes. This can cause lasting brain damage, long-term disability, or even death.

The full article covers:

  • What is an ischemic stroke?
  • What causes an ischemic stroke?
  • What are the symptoms of ischemic stroke?
  • How is an ischemic stroke diagnosed?
  • How is an ischemic stroke treated?
  • Can an ischemic stroke be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I63Overview

Is I63 (Cerebral infarction) a billable code?

No. This is a category header that groups the codes for cerebral infarction, and headers cannot be submitted on claims. Claims for cerebral infarction need a more specific code from this category, such as I63.00, I63.011, and I63.012.