ICD-10-CM > A00-B99 > B00-B09 > B00 > B00.4 B00.4 Herpesviral encephalitis Billable/Specific Copy Code Copy Description Applicable To Herpesviral meningoencephalitisSimian B disease Type 1 Excludes herpesviral encephalitis due to herpesvirus 6 and 7 (B10.01, B10.09)non-simplex herpesviral encephalitis (B10.0-)