ICD10BillableValid for clinical use
ICD-10 Code I60.00: Nontraumatic subarachnoid hemorrhage from unspecified carotid siphon and bifurcation
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 unspecified carotid siphon and bifurcation 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.
- Subarachnoid hemorrhage from the carotid siphon and bifurcation is coded separately from middle cerebral, posterior communicating, vertebral, basilar, 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
I60.01Nontraumatic subarachnoid hemorrhage from right 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.
I60.02Nontraumatic subarachnoid hemorrhage from left 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.
Code hierarchy
chapter
9Diseases of the circulatory system (I00-I99)
block
I60-I69Cerebrovascular diseases
category
I60Nontraumatic subarachnoid hemorrhage
category
I60.0Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation
currentI60.0
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 PhysicianOrthopedic SpecialistNeurologistStroke Specialist
Related codes
Sibling codes
Coverage-related procedures and services
CPT 93319high
3D ECHOCARDIOGRAPHIC IMAGING AND POSTPROCESSING DURING TRANSESOPHAGEAL ECHOCARDIOGRAPHY, OR DURING TRANSTHORACIC ECHOCARDIOGRAPHY FOR CONGENITAL CARDIAC ANOMALIES, FOR THE ASSESSMENT OF CARDIAC STRUCTURE(S) (EG, CARDIAC CHAMBERS AND VALVES, LEFT ATRIAL APPENDAGE, INTERATRIAL SEPTUM, INTERVENTRICULAR SEPTUM) AND FUNCTION, WHEN PERFORMED (LIST SEPARATELY IN ADDITION TO CODE FOR ECHOCARDIOGRAPHIC IMAGING)
Source: CMS coverage guidance
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 95940high
CONTINUOUS INTRAOPERATIVE NEUROPHYSIOLOGY MONITORING IN THE OPERATING ROOM, ONE ON ONE MONITORING REQUIRING PERSONAL ATTENDANCE, EACH 15 MINUTES (LIST SEPARATELY IN ADDITION TO CODE FOR PRIMARY PROCEDURE)
Source: CMS coverage guidance
HCPCS G0453high
CONTINUOUS INTRAOPERATIVE NEUROPHYSIOLOGY MONITORING, FROM OUTSIDE THE OPERATING ROOM (REMOTE OR NEARBY), PER PATIENT, (ATTENTION DIRECTED EXCLUSIVELY TO ONE PATIENT) EACH 15 MINUTES (LIST IN ADDITION TO PRIMARY PROCEDURE)
Source: CMS coverage guidance
CPT 93325high
DOPPLER ECHOCARDIOGRAPHY COLOR FLOW VELOCITY MAPPING (LIST SEPARATELY IN ADDITION TO CODES FOR ECHOCARDIOGRAPHY)
Source: CMS coverage guidance
Coding guidelines
Common synonyms
Nontraumatic subarachnoid hemorrhage from unspecified carotid siphon and bifurcationNontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation
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.