B08.21
Exanthema subitum [sixth disease] due to human herpesvirus 6
Clinical Classification Guidelines
Inclusion Terms
- Roseola infantum due to human herpesvirus 6
Medical Intelligence & Overview
Exanthema subitum, commonly known as sixth disease, is a contagious childhood illness caused by the human herpesvirus 6 (HHV-6). It primarily affects infants and young children, leading to a distinctive rash and fever. Recognized under the ICD-10 code B08.21, this condition is generally mild but can cause discomfort for the affected child. It’s also referred to as roseola infantum because of its characteristic skin rash. Although most children recover fully without complications, understanding the symptoms, causes, and management options is beneficial for caregivers and parents.
Causes & Symptoms
Clinical Causes: The primary cause is infection with the human herpesvirus 6 (HHV-6), a common virus that most children are exposed to by the age of two. The virus spreads through respiratory droplets from coughing or sneezing, and potentially through close contact with an infected person's saliva. Once infected, the virus remains in the body in a dormant state and can reactivate later in life. Transmission typically occurs among young children in settings like daycare or preschool, where close contact is common.
Key Symptoms: Sudden high fever that lasts for about three to five days Followed by a sudden drop in fever and the appearance of a distinctive rash The rash, which appears as pink or red spots, usually begins on the trunk and spreads to the neck, face, and limbs Irritability or fussiness in infants and young children Swollen lymph nodes in the neck or behind the ears Mild respiratory symptoms such as cough or runny nose may occur Less common symptoms include irritability, loss of appetite, and mild diarrhea
Diagnostic & Treatment
Diagnosis Path: Diagnosis is often based on the child's medical history and appearance of symptoms, particularly the characteristic rash following a fever. Laboratory tests include blood tests to detect HHV-6 DNA or antibodies, but these are usually not necessary. Doctors may also perform a physical examination to rule out other illnesses with similar symptoms.
Treatment Protocols: Providing plenty of fluids to prevent dehydration Using acetaminophen or age-appropriate doses of ibuprofen to reduce fever and discomfort Ensuring rest for the child during recovery Monitoring the child's temperature and overall condition until symptoms resolve
Clinical Advice & FAQs
Billing Guidance
Is B08.21 a billable ICD-10 code?
Yes, B08.21 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report B08.21?
Clinical documentation must specify the nature of Exanthema subitum [sixth disease] due to human herpesvirus 6 and any associated comorbidities for accurate reporting.
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