ICD-10 Code A08 – Viral and other specified intestinal infections (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A08 – Viral and other specified intestinal infections
What it is
A08 identifies intestinal infections caused by viruses or other specified organisms. Use it when the record documents an infectious gastroenteritis or enteritis that is not classified elsewhere.
Clinical signs
Typical findings include diarrhea, nausea, vomiting, abdominal cramps, and dehydration risk. Clinical features vary; refer to documentation for the specific organism or syndrome.
When to use this code
Use A08 when the provider documents a viral or specified intestinal infection and no more specific ICD-10 code is available. It may apply to acute infectious diarrhea, gastroenteritis, or enteritis with an identified qualifying cause. Check documentation if the organism is named, because a more specific code may exist.
Do not use for
Do not use A08 for noninfectious diarrhea, food poisoning without infectious enteritis, or conditions coded elsewhere. Do not use it when the record supports a more specific organism or diagnosis.
Coding tip
Code the documented organism or syndrome as specifically as the chart allows, and use A08 only when no more specific code applies.