B08.21
BillableExanthema subitum [sixth disease] due to human herpesvirus 6
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
Exanthema subitum, also known as sixth disease, is a viral infection caused by human herpesvirus 6 that primarily affects infants and young children. It typically presents with high fever followed by a characteristic pink rash that appears as the fever subsides.
Coding Tips
- •This code is specific to HHV-6 etiology; do not use if the causative organism is unknown or different (such as HHV-7, which would be B08.22)
- •Document the clinical presentation including fever duration and rash characteristics in the medical record to support medical necessity and accurate coding
Code Hierarchy
└B08Other viral infections characterized by skin and mucous membrane lesions, not elsewhere classified└B08.2Exanthema subitum [sixth disease]└B08.21Exanthema subitum [sixth disease] due to human herpesvirus 6
└B08.21Exanthema subitum [sixth disease] due to human herpesvirus 6