ICD-10 Code I60.11 – Nontraumatic subarachnoid hemorrhage from right middle cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I60.11 – Nontraumatic subarachnoid hemorrhage from right middle cerebral artery
What it is
This code identifies a spontaneous subarachnoid hemorrhage arising from the right middle cerebral artery. It means bleeding has occurred into the space around the brain without trauma, and the source is documented as the right MCA.
Clinical signs
Typical findings include sudden severe headache, neck stiffness, nausea, vomiting, photophobia, or altered mental status. Diagnosis is usually supported by brain imaging and documentation that the hemorrhage is nontraumatic and linked to the right middle cerebral artery.
When to use this code
Use I60.11 when the provider documents a nontraumatic subarachnoid hemorrhage specifically from the right middle cerebral artery. It is appropriate when imaging or clinical notes identify the arterial source and the event is not due to injury. Check documentation if the laterality or vessel source is unclear.
Do not use for
Do not use this code for traumatic subarachnoid hemorrhage or for subarachnoid bleeding from a different artery. If the source vessel is not specified, or the record only says intracranial hemorrhage, check documentation.
Coding tip
Assign the code only when both nontraumatic cause and right middle cerebral artery source are clearly documented.