2027 ICD-10-CM Diagnosis Code I63Cerebral infarction

ICD-10-CM Codes›I00–I99›I60-I69›I63

ICD-10-CM I63
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Cerebral infarction
Same as the full description in the CMS dataset.
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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I63: its own notes plus those printed at block I60-I69 and Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

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

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On I63 itself
  • neonatal cerebral infarction (P91.82-)
From Block I60-I69 Cerebrovascular diseases applies to 410 codes
  • traumatic intracranial hemorrhage (S06.-)

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On I63 itself
  • chronic, without residual deficits (sequelae) (Z86.73)
  • sequelae of cerebral infarction (I69.3-)
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

On I63 itself
  • 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-)
From Block I60-I69 Cerebrovascular diseases applies to 410 codes
  • code to identify presence of:
  • alcohol abuse and dependence (F10.-)
  • exposure to environmental tobacco smoke (Z77.22)
  • history of tobacco dependence (Z87.891)
  • hypertension (I10-I1A)
  • occupational exposure to environmental tobacco smoke (Z57.31)
  • tobacco dependence (F17.-)
  • tobacco use (Z72.0)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I63, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming I63: they are not reported together with it, unless the two conditions are unrelated.

  • P91.82 Neonatal cerebral infarction
    cerebral infarction (I63.-)

Code First 2

These codes say to code first a condition named in the note, and I63 is one of the conditions named.

  • R29.7 National Institutes of Health Stroke Scale (NIHSS) score
    the type of cerebral infarction (I60.-, I61.-, I62.-, I63.-)
  • Z92.82 Status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility
    acute cerebral infarction (I63.-)

Code Also 11

These codes say I63 may also be needed to fully describe the condition. The note gives no sequencing direction.

  • D57.03 Hb-SS disease with cerebral vascular involvement
    if applicable, cerebral infarction (I63.-)
  • D57.213 Sickle-cell/Hb-C disease with cerebral vascular involvement
    if applicable, cerebral infarction (I63.-)
  • D57.413 Sickle-cell thalassemia, unspecified, with cerebral vascular involvement
    if applicable cerebral infarction (I63.-)
  • D57.433 Sickle-cell thalassemia beta zero with cerebral vascular involvement
    if applicable cerebral infarction (I63.-)
  • D57.453 Sickle-cell thalassemia beta plus with cerebral vascular involvement
    if applicable cerebral infarction (I63.-)
  • D57.813 Other sickle-cell disorders with cerebral vascular involvement
    if applicable: cerebral infarction (I63.-)
  • D81.32 Adenosine deaminase 2 deficiency
    stroke (I63.-)
  • G43.6 Persistent migraine aura with cerebral infarction
    the type of cerebral infarction (I63.-)
  • G96.81 Intracranial hypotension
    Stroke (I63.-)
  • I16.1 Hypertensive emergency
    cerebral infarction (I63.-)
  • I67.850 Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy
    stroke (I63.-)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

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).

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I63Overview

What is the ICD-10 code for cerebral infarction?

I63 is the ICD-10-CM category for cerebral infarction, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can I63 be reported with a code from P91.82?

Not as a rule. The Excludes1 note on I63 lists "neonatal cerebral infarction (P91.82-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does I63 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: 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-). The additional code is reported after I63.