ICD-10 Code A08.2 – Adenoviral enteritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A08.2 – Adenoviral enteritis
What it is
A08.2 identifies adenoviral enteritis, an intestinal infection caused by adenovirus. Use it when the record documents adenovirus as the cause of gastroenteritis or enteritis.
Clinical signs
Typical findings include diarrhea, abdominal cramps, nausea, vomiting, and dehydration. Clinical features vary; refer to documentation, especially when the diagnosis is based on stool testing or a clear provider statement.
When to use this code
Use A08.2 when the clinician documents adenoviral enteritis, adenoviral gastroenteritis, or intestinal infection due to adenovirus. It is appropriate when the chart links the gastrointestinal illness to adenovirus rather than to another organism or an unspecified viral cause.
If the record only says viral enteritis or infectious diarrhea without naming adenovirus, check documentation before assigning this code. Code the documented organism when available.
Do not use for
Do not use A08.2 for noninfectious diarrhea, food poisoning, or enteritis caused by another specified pathogen. Check documentation if the cause is unclear or if the provider documents only gastroenteritis without adenovirus.
Coding tip
Assign A08.2 only when adenovirus is explicitly documented as the cause of the intestinal infection.