ICD10BillableValid for clinical use
ICD-10 Code I60.4: Nontraumatic subarachnoid hemorrhage from basilar artery
Reviewed by HealthAssure Clinical TeamUpdated 26 May 2026
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 nontraumatic subarachnoid hemorrhage. The most accurate code depends on which intracranial artery is identified as the source and whether laterality is documented for certain branches.
When is it used?
- May be used when a clinician documents nontraumatic subarachnoid hemorrhage from 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
- Neurology, emergency, inpatient, and critical-care workflows where subarachnoid hemorrhage is part of the active acute diagnosis set.
- Coding and utilization-review workflows where the chart supports nontraumatic subarachnoid hemorrhage and the final code changes based on the artery source or laterality.
Common management context
- Evaluation often includes acute neurologic assessment, neuroimaging review, hemodynamic monitoring context, and coordination across neurology, neurosurgery, and critical-care teams.
- Documentation usually becomes more specific when the chart identifies the source artery, right-versus-left branch involvement when applicable, or another more specific hemorrhage subtype.
- Specialist context already linked on this page includes Cardiologist, General Physician, Orthopedic Specialist, Neurologist.
🔍Key distinctions
Important notes
- These ICD-10 codes are reserved for nontraumatic subarachnoid hemorrhage rather than intracerebral hemorrhage, other intracranial hemorrhage, or ischemic stroke.
- Source artery and laterality detail drive most of the code specificity inside this family.
- Basilar-artery subarachnoid hemorrhage is coded separately from carotid siphon, middle cerebral, communicating-artery, vertebral, other intracranial, or unspecified intracranial artery sources.
- Documentation that describes nontraumatic subarachnoid hemorrhage is coded differently from intracerebral hemorrhage, other intracranial hemorrhage, or cerebral infarction.
Related codes to consider
I60.0Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation
Related hemorrhagic-stroke ICD-10 code; documentation often becomes more specific when the chart identifies the source artery, laterality, or another intracranial-hemorrhage subtype.
I60.1Nontraumatic subarachnoid hemorrhage from middle cerebral artery
Related hemorrhagic-stroke ICD-10 code; documentation often becomes more specific when the chart identifies the source artery, laterality, or another intracranial-hemorrhage subtype.
I60.2Nontraumatic subarachnoid hemorrhage from anterior communicating artery
Related hemorrhagic-stroke ICD-10 code; documentation often becomes more specific when the chart identifies the source artery, laterality, or another intracranial-hemorrhage subtype.
I60.3Nontraumatic subarachnoid hemorrhage from posterior communicating artery
Related hemorrhagic-stroke ICD-10 code; documentation often becomes more specific when the chart identifies the source artery, laterality, or another intracranial-hemorrhage subtype.
Code hierarchy
chapter
9Diseases of the circulatory system (I00-I99)
block
I60-I69Cerebrovascular diseases
category
I60Nontraumatic subarachnoid hemorrhage
currentI60
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 PhysicianOrthopedic SpecialistNeurologistStroke Specialist
Related codes
I60.0Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcationcategoryI60.1Nontraumatic subarachnoid hemorrhage from middle cerebral arterycategoryI60.2Nontraumatic subarachnoid hemorrhage from anterior communicating arterycodeI60.3Nontraumatic subarachnoid hemorrhage from posterior communicating arterycategoryI60.5Nontraumatic subarachnoid hemorrhage from vertebral arterycategoryI60.6Nontraumatic subarachnoid hemorrhage from other intracranial arteriescodeI60.7Nontraumatic subarachnoid hemorrhage from unspecified intracranial arterycodeI60.8Other nontraumatic subarachnoid hemorrhagecodeI60.9Nontraumatic subarachnoid hemorrhage, unspecifiedcode
Sibling codes
I60.0Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcationI60.1Nontraumatic subarachnoid hemorrhage from middle cerebral arteryI60.2Nontraumatic subarachnoid hemorrhage from anterior communicating arterybillableI60.3Nontraumatic subarachnoid hemorrhage from posterior communicating arteryI60.5Nontraumatic subarachnoid hemorrhage from vertebral arteryI60.6Nontraumatic subarachnoid hemorrhage from other intracranial arteriesbillableI60.7Nontraumatic subarachnoid hemorrhage from unspecified intracranial arterybillableI60.8Other nontraumatic subarachnoid hemorrhagebillableI60.9Nontraumatic subarachnoid hemorrhage, unspecifiedbillable
Coverage-related procedures and services
CPT 76376high
3D RENDERING WITH INTERPRETATION AND REPORTING OF COMPUTED TOMOGRAPHY, MAGNETIC RESONANCE IMAGING, ULTRASOUND, OR OTHER TOMOGRAPHIC MODALITY WITH IMAGE POSTPROCESSING UNDER CONCURRENT SUPERVISION; NOT REQUIRING IMAGE POSTPROCESSING ON AN INDEPENDENT WORKSTATION
Source: CMS coverage guidance
CPT 76377high
3D RENDERING WITH INTERPRETATION AND REPORTING OF COMPUTED TOMOGRAPHY, MAGNETIC RESONANCE IMAGING, ULTRASOUND, OR OTHER TOMOGRAPHIC MODALITY WITH IMAGE POSTPROCESSING UNDER CONCURRENT SUPERVISION; REQUIRING IMAGE POSTPROCESSING ON AN INDEPENDENT WORKSTATION
Source: CMS coverage guidance
CPT 93325high
DOPPLER ECHOCARDIOGRAPHY COLOR FLOW VELOCITY MAPPING (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHY)
Source: CMS coverage guidance
CPT 93320high
DOPPLER ECHOCARDIOGRAPHY, PULSED WAVE AND/OR CONTINUOUS WAVE WITH SPECTRAL DISPLAY (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHIC IMAGING); COMPLETE
Source: CMS coverage guidance
CPT 93321high
DOPPLER ECHOCARDIOGRAPHY, PULSED WAVE AND/OR CONTINUOUS WAVE WITH SPECTRAL DISPLAY (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHIC IMAGING); FOLLOW-UP OR LIMITED STUDY (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHIC IMAGING)
Source: CMS coverage guidance
CPT 93886high
TRANSCRANIAL DOPPLER STUDY OF THE INTRACRANIAL ARTERIES; COMPLETE STUDY
Source: CMS coverage guidance
Mapped diagnoses and classifications
SNOMED_CT 277324009high
Ruptured aneurysm of basilar artery
Source: SNOMED International ICD-10 map
SNOMED_CT 291351000119109high
Spontaneous hemorrhage of subarachnoid space from basilar artery
Source: SNOMED International ICD-10 map
SNOMED_CT 276284000high
Subarachnoid haemorrhage from basilar artery aneurysm
Source: SNOMED International ICD-10 map
Coding guidelines
Compatibility
Legacy and official ICD code match exactly.
Legacy codes
I60.4
Common synonyms
Nontraumatic subarachnoid hemorrhage from basilar artery
Frequently asked questions
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.