I60Nontraumatic subarachnoid hemorrhage

I60 is the ICD-10-CM diagnosis code for nontraumatic subarachnoid hemorrhage. It belongs to 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 10 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I60.0 (from carotid siphon and bifurcation), I60.1 (from middle cerebral artery), I60.2 (from anterior communicating artery), I60.3 (from posterior communicating artery), I60.4 (from basilar artery), I60.5 (from vertebral artery), I60.6 (from other intracranial arteries), I60.7 (from unspecified intracranial artery) and 2 more.

Don't report I60 together with the conditions in its Excludes1 note: syphilitic ruptured cerebral aneurysm (A52.05).

The conditions in its Excludes2 note aren't part of I60, but may be coded alongside it if the patient has both: sequelae of subarachnoid hemorrhage (I69.0-).

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.