ICD-10 Code A08.3 – Other viral enteritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A08.3 – Other viral enteritis
What it is
A08.3 identifies viral inflammation of the intestines that is not classified elsewhere. Use it for enteritis caused by a virus when the documentation does not specify a more exact code.
Clinical signs
Clinical features vary; refer to documentation. Typical findings include acute diarrhea, abdominal cramps, nausea, vomiting, and signs of dehydration when illness is more severe.
When to use this code
Use this code when the provider documents viral enteritis without naming a specific viral agent or when the agent is not coded elsewhere. It also fits cases described as other viral gastroenteritis or viral intestinal infection, if the record supports enteritis.
Do not use for
Do not use A08.3 for bacterial, parasitic, or noninfectious causes of diarrhea. If the documentation names a specific viral infection with a different ICD-10-CM code, choose that code instead.
Coding tip
Check the record for the exact organism and whether the provider documented gastroenteritis versus enteritis before assigning A08.3.