B10.0Other human herpesvirus encephalitis

B10.0 is the ICD-10-CM diagnosis code for other human herpesvirus encephalitis. It belongs to category B10 (other human herpesviruses), block B10 (other human herpesviruses) and chapter 1 (certain infectious and parasitic diseases). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within B10 (other human herpesviruses), B10.0 is specifically for other human herpesvirus encephalitis. Related codes cover infection (B10.8).

To report this condition, pick the subcode that matches the documentation: B10.01 (encephalitis) and B10.09 (encephalitis).

The conditions in its Excludes2 note aren't part of B10.0, but may be coded alongside it if the patient has both: herpes encephalitis NOS (B00.4), herpes simplex encephalitis (B00.4), human herpesvirus encephalitis (B00.4) and simian B herpes virus encephalitis (B00.4).

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