I60.0Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation

I60.0 is the ICD-10-CM diagnosis code for nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation. It belongs to category I60 (nontraumatic subarachnoid hemorrhage), block I60-I69 (cerebrovascular diseases) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within I60 (nontraumatic subarachnoid hemorrhage), I60.0 is specifically for nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation. Related codes cover from middle cerebral artery (I60.1), from anterior communicating artery (I60.2), from posterior communicating artery (I60.3), from basilar artery (I60.4), from vertebral artery (I60.5), from other intracranial arteries (I60.6), from unspecified intracranial artery (I60.7), other nontraumatic subarachnoid hemorrhage (I60.8) and 1 more.

To report this condition, pick the subcode that matches the documentation: I60.00 (bifurcation), I60.01 (bifurcation) and I60.02 (bifurcation).

Use an additional code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.