A08.1Header code — not billable
Acute gastroenteropathy due to Norwalk agent and other small round viruses
Short description: Acute gastrent d/t Norwalk agent and oth small round viruses
- Chapter
- 1. Certain infectious and parasitic diseases
- Category
- A08
- Effective date
- October 1, 2026
Related codes in category A08
A08Viral and other specified intestinal infectionsA08.0Rotaviral enteritisYesA08.11Acute gastroenteropathy due to Norwalk agentYesA08.19Acute gastroenteropathy due to other small round virusesYesA08.2Adenoviral enteritisYesA08.3Other viral enteritisA08.31Calicivirus enteritisYesA08.32Astrovirus enteritisYesA08.39Other viral enteritisYesA08.4Viral intestinal infection, unspecifiedYesA08.8Other specified intestinal infectionsYes
Frequently asked questions
What is ICD-10 code A08.1?
A08.1 is an ICD-10-CM diagnosis code for Acute gastroenteropathy due to Norwalk agent and other small round viruses.
Is A08.1 a billable code?
No. A08.1 is a category/header code, not billable on its own — use one of its more specific child codes instead.
What ICD-10-CM chapter is A08.1 in?
A08.1 falls under Chapter 1: Certain infectious and parasitic diseases.
When did A08.1 become effective?
A08.1 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.
What other codes are related to A08.1?
A08.1 belongs to category A08, which includes 11 other codes — see the related codes list on this page.
ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.