ICD-10 Code A08.4 – Viral intestinal infection, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A08.4 – Viral intestinal infection, unspecified
What it is
A08.4 identifies a viral infection of the intestines when the specific virus is not documented. Use it for nonspecific viral gastroenteritis or enteritis affecting the bowel.
Clinical signs
Typical findings include diarrhea, abdominal cramps, nausea, vomiting, and sometimes fever. Clinical features vary; refer to documentation for the exact viral syndrome recorded.
When to use this code
Use A08.4 when the provider documents a viral intestinal infection, viral gastroenteritis, or viral enteritis without naming the organism. It also fits cases where the record confirms a viral cause but does not identify the virus. Check documentation if the note describes dehydration, foodborne illness, or a nonviral gastrointestinal condition instead.
Do not use for
Do not use this code for bacterial, parasitic, or unspecified infectious diarrhea without viral documentation. Do not assign it when the provider names a specific viral agent and a more precise code is available.
Coding tip
Code the documented viral intestinal infection, but confirm whether the chart names a specific virus before defaulting to A08.4.