ICD-10 Code I60.12 – Nontraumatic subarachnoid hemorrhage from left middle cerebral artery (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code I60.12 – Nontraumatic subarachnoid hemorrhage from left middle cerebral artery
What it is
This code identifies a spontaneous subarachnoid hemorrhage arising from the left middle cerebral artery. It means blood has leaked into the space around the brain without trauma, and the source is documented as the left MCA.
Clinical signs
Typical findings include sudden severe headache, nausea, neck stiffness, photophobia, or altered mental status. Clinical features vary; refer to documentation, imaging, and provider assessment for the exact vessel and nontraumatic cause.
When to use this code
Use I60.12 when the record clearly states a nontraumatic subarachnoid hemorrhage from the left middle cerebral artery. This is appropriate when imaging or the provider identifies the left MCA as the bleeding source. If laterality or vessel origin 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 cerebral artery. If the chart does not specify the left middle cerebral artery, do not assume this code.
Coding tip
Verify both nontraumatic etiology and left-sided MCA source in the final provider documentation before assigning I60.12.