ICD-10 Code I60.0 – Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I60.0 – Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation
What it is
This code identifies a nontraumatic subarachnoid hemorrhage arising from the carotid siphon or carotid bifurcation. It means bleeding has occurred in the space around the brain without an external injury.
Clinical signs
Typical findings include sudden severe headache, neck stiffness, nausea, vomiting, or loss of consciousness. Clinical features vary; refer to documentation and imaging or specialist assessment.
When to use this code
Use I60.0 when the provider documents a spontaneous subarachnoid hemorrhage specifically linked to the carotid siphon or bifurcation. Apply it when the source vessel is identified in the record. If the anatomic site is unclear, check documentation before coding.
Do not use for
Do not use this code for traumatic subarachnoid hemorrhage or for hemorrhage from a different intracranial vessel. Do not guess the site if the record only says subarachnoid hemorrhage; check documentation.
Coding tip
Confirm both nontraumatic origin and the exact carotid location in the provider note before assigning I60.0.