ICD-10-CM > A00-B99 > B00-B09 > B08 > B08.2 B08.2 Exanthema subitum [sixth disease] Non-Billable/Non-Specific Applicable To Roseola infantum Codes B08.20Exanthema subitum [sixth disease], unspecifiedB08.21Exanthema subitum [sixth disease] due to human herpesvirus 6B08.22Exanthema subitum [sixth disease] due to human herpesvirus 7