All ICD10 Codes
I63Not billable, use a more specific code below

Cerebral infarction

In Cerebrovascular diseases (I60-I69), chapter 9: Diseases of the Circulatory System

91 billable codes under I63: all are an MCC; all map to HCC 249 (Ischemic or Unspecified Stroke).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.

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Instructional notes

Includes: conditions that are coded here

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

Excludes1: not coded here, use a different code

  • neonatal cerebral infarction (P91.82-)

Excludes2: not included here, code separately if applicable

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

Use additional code: add a second code for this, listed after this one

  • 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-)

Also applies, from Cerebrovascular diseases (I60-I69)

These notes sit on I60-I69 and apply to every code under it, including I63.

Excludes1: not coded here, use a different code

  • traumatic intracranial hemorrhage (S06.-)

Use additional code: add a second code for this, listed after this one

  • 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)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers hypertension with heart and kidney disease, coronary artery disease with angina, perioperative stroke, cerebrovascular sequelae, and acute myocardial infarction types and timing.

Read Section I.C.9 (page 50)

All codes under I63

I63 can't be used on a claim. Pick a billable code below; grey headings group them.

I63 MS-DRGs

As the principal diagnosis, all 91 billable codes under I63 group to these 10 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to I63

Notes on these codes point to I63.

  • D57.03 Code Also: if applicable, cerebral infarction (I63.-)
  • D57.213 Code Also: if applicable, cerebral infarction (I63.-)
  • D57.413 Code Also: if applicable cerebral infarction (I63.-)
  • D57.433 Code Also: if applicable cerebral infarction (I63.-)
  • D57.453 Code Also: if applicable cerebral infarction (I63.-)
  • D57.813 Code Also: if applicable: cerebral infarction (I63.-)
  • D81.32 Code Also: stroke (I63.-)
  • G43.6 Code Also: the type of cerebral infarction (I63.-)
  • G96.81 Code Also: Stroke (I63.-)
  • I16.1 Code Also: cerebral infarction (I63.-)
  • I67.850 Code Also: stroke (I63.-)
  • P91.82 Excludes1: cerebral infarction (I63.-)
  • R29.7 Code First: the type of cerebral infarction (I60.-, I61.-, I62.-, I63.-)
  • Z92.82 Code First: acute cerebral infarction (I63.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

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.

Read more about ischemic stroke on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.