ICD-10-CM > A00-B99 > A00-A09 > A08 A08 Viral and other specified intestinal infections Non-Billable/Non-Specific Type 1 Excludes influenza with involvement of gastrointestinal tract (J09.X3, J10.2, J11.2) Codes A08.0Rotaviral enteritisA08.1Acute gastroenteropathy due to Norwalk agent and other small round virusesA08.11Acute gastroenteropathy due to Norwalk agentA08.19Acute gastroenteropathy due to other small round virusesA08.2Adenoviral enteritisA08.3Other viral enteritisA08.31Calicivirus enteritisA08.32Astrovirus enteritisA08.39Other viral enteritisA08.4Viral intestinal infection, unspecifiedA08.8Other specified intestinal infections