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ICD-10 Code I63.02: Cerebral infarction due to thrombosis of basilar artery

I63.02 is a billable ICD-10 diagnosis code used to classify Cerebral infarction due to thrombosis of basilar artery in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Diseases of the circulatory system (I00-I99).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. 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 thrombosis of a precerebral artery. The most accurate code depends on whether the record identifies the specific artery and any laterality detail.

When is it used?

  • May be used when a clinician documents cerebral infarction due to thrombosis of basilar artery in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

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.

đź©şClinical context

When commonly used
  • Stroke, neurology, inpatient, and utilization-review documentation where ischemic stroke is linked to thrombotic disease in a precerebral artery.
  • Coding workflows where the chart identifies thrombosis of vertebral, basilar, carotid, unspecified, or another precerebral artery as the mechanism for cerebral infarction.
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 names the exact precerebral artery and clarifies whether the event is thrombotic rather than embolic or another occlusive pattern.
  • 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 thrombosis of a precerebral artery rather than embolic disease or another unspecified occlusive pattern.
  • Specific artery detail such as carotid, vertebral, basilar, or other precerebral involvement can change the final code.
  • Within the precerebral-artery branch, documentation that names vertebral, basilar, carotid, or another precerebral artery changes code specificity.
  • Documentation that attributes cerebral infarction to thrombosis of precerebral arteries is coded differently from infarction due to embolism or unspecified occlusion or stenosis of similar precerebral arteries.
Related codes to consider
I63.00Cerebral infarction due to thrombosis of unspecified precerebral 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.
I63.01Cerebral infarction due to thrombosis of vertebral 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.
I63.03Cerebral infarction due to thrombosis of carotid 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.
I63.09Cerebral infarction due to thrombosis of other precerebral 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.

Code hierarchy

chapter
9Diseases of the circulatory system (I00-I99)
block
I60-I69Cerebrovascular diseases
category
I63Cerebral infarction
category
I63.0Cerebral infarction due to thrombosis of precerebral arteries
currentI63.0

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

CardiologistGeneral PhysicianNeurologistStroke Specialist

Coding guidelines

Common synonyms

Cerebral infarction due to thrombosis of basilar artery

Frequently asked questions

Code details

CodeI63.02
SystemICD10
Display nameCerebral infarction due to thrombosis of basilar artery
ChapterDiseases of the circulatory system (I00-I99)
BlockCerebrovascular diseases

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Occlusion, occluded

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.