ICD-10 Code A88.0 – Enteroviral exanthematous fever [Boston exanthem] (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A88.0 – Enteroviral exanthematous fever [Boston exanthem]
What it is
A88.0 identifies enteroviral exanthematous fever, also called Boston exanthem. It is a viral illness caused by enteroviruses and marked by fever with a rash.
Clinical signs
Typical findings include sudden fever, malaise, and a generalized maculopapular or exanthematous rash. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents Boston exanthem or enteroviral exanthematous fever as the diagnosis. It also fits cases where an enteroviral rash illness is clearly identified in the record. If the note only says “viral rash,” check documentation before coding.
Do not use for
Do not use A88.0 for nonspecific fever, drug eruptions, or rashes from other confirmed causes. If the illness is not documented as enteroviral, check documentation.
Coding tip
Code from the provider’s exact wording, and confirm that the rash illness is documented as enteroviral or Boston exanthem.