Exanthema subitum [sixth disease] due to human herpesvirus 7

This code identifies roseola infantum, also known as sixth disease, specifically when caused by human herpesvirus 7 (HHV-7). It is a common, mild viral illness primarily affecting infants and young children, characterized by a sudden high fever followed by a distinctive rash.

Use this code when documentation clearly states a diagnosis of exanthema subitum or roseola infantum, and specifies HHV-7 as the causative agent. This typically follows a clinical presentation of high fever resolving before the onset of a maculopapular rash, with laboratory confirmation or strong clinical suspicion of HHV-7.

• Do not use this code if the causative agent is human herpesvirus 6 (HHV-6); a different code exists for that etiology.
• Ensure the medical record explicitly links the roseola to HHV-7; "roseola" alone is insufficient for this specific code.
• Consider sequencing this code as the primary diagnosis if it is the reason for the encounter.