HealthAssure
HealthAssureGood Life
ICD10

ICD-10 Code I63.2: Cerebral infarction due to unspecified occlusion or stenosis of precerebral arteries

I63.2 is an ICD-10 diagnosis entry used to group records related to Cerebral infarction due to unspecified occlusion or stenosis of precerebral arteries. You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen. ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

What is this code?

ICD-10 entries help standardize how diagnoses are organized for coding, reporting, analytics, and documentation. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

đź“‹Clinical overview

This ICD-10 code is commonly used when documentation describes cerebral infarction attributed to unspecified occlusion or stenosis of a precerebral artery. The most accurate code depends on whether the record later clarifies the exact artery or a more specific thrombotic versus embolic mechanism.

When is it used?

  • May be used when a clinician documents cerebral infarction due to unspecified occlusion or stenosis of precerebral arteries in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code may act more like a grouping or parent code, so a more specific child code may be used in final documentation when available.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.
  • This entry may represent a broader category rather than the most specific billable code.

đź©şClinical context

When commonly used
  • Stroke, neurology, inpatient, and utilization-review documentation where ischemic stroke is linked to precerebral arterial occlusion but the record does not clearly distinguish thrombosis from embolism.
  • Coding workflows where the chart identifies vertebral, basilar, carotid, unspecified, or another precerebral artery but preserves broader occlusion or stenosis language.
Common management context
  • Evaluation often includes neurologic examination, vascular imaging review, acute-stroke assessment context, and follow-up of ischemic deficits or stroke-risk factors.
  • Documentation usually becomes more specific when the chart clarifies whether the occlusive event is thrombotic versus embolic and names the exact artery involved.
  • Specialist context already linked on this page includes Cardiologist, General Physician, Neurologist, Stroke Specialist.

🔍Key distinctions

Important notes
  • These ICD-10 codes describe ischemic stroke attributed to a broader unspecified occlusion or stenosis pattern in a precerebral artery rather than clearly documented thrombosis or embolism.
  • Specific artery detail such as carotid, vertebral, basilar, or other precerebral involvement can change the final code.
  • This parent page groups vessel-specific ischemic-stroke codes where documentation attributes cerebral infarction to unspecified occlusion or stenosis of precerebral arteries, so the final billable code usually depends on the named artery and any laterality detail.
  • Documentation that attributes cerebral infarction to unspecified occlusion or stenosis of precerebral arteries is coded differently from infarction due to thrombosis or embolism of similar precerebral arteries.
Related codes to consider
I63.20Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteries
Related cerebral-infarction ICD-10 code; documentation often becomes more specific when the chart identifies thrombosis versus embolism, the exact artery, laterality, or another occlusive mechanism.
I63.22Cerebral infarction due to unspecified occlusion or stenosis of basilar artery
Related cerebral-infarction ICD-10 code; documentation often becomes more specific when the chart identifies thrombosis versus embolism, the exact artery, laterality, or another occlusive mechanism.
I63.29Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries
Related cerebral-infarction ICD-10 code; documentation often becomes more specific when the chart identifies thrombosis versus embolism, the exact artery, laterality, or another occlusive mechanism.

Code hierarchy

chapter
9Diseases of the circulatory system (I00-I99)
block
I60-I69Cerebrovascular diseases
category
I63Cerebral infarction
currentI63

Where you may see this code

You may see this entry in coding references, medical records, or claims workflows when a broader diagnosis category is being reviewed before a more specific code is chosen.

Related specialists

CardiologistGeneral PhysicianNeurologistStroke Specialist

Coding guidelines

Compatibility

Legacy code aligns to an official FY 2026 category. Frontend should resolve to the official category page and surface the billable child codes.
Legacy codes
I63.2
Replacement codes
I63.20 — Cerebral infarction due to unspecified occlusion or stenosis of unspecified precerebral arteriesI63.22 — Cerebral infarction due to unspecified occlusion or stenosis of basilar arteryI63.29 — Cerebral infarction due to unspecified occlusion or stenosis of other precerebral arteries

Common synonyms

Cerebral infarction due to unspecified occlusion or stenosis of precerebral arteriesCerebral infarction due to occlusion or stenosis of precerebral arteries

Frequently asked questions

Code details

CodeI63.2
SystemICD10
Display nameCerebral infarction due to unspecified occlusion or stenosis of precerebral arteries
ChapterDiseases of the circulatory system (I00-I99)
BlockCerebrovascular diseases

Flags

BillableNo
Valid clinical useNo

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.