2026 ICD-10-CM Diagnosis Code A08Viral and other specified intestinal infections

ICD-10-CM Codes›A00–B99›A00-A09›A08

ICD-10-CM A08
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

A08 is a non-billable ICD-10-CM category code for viral and other specified intestinal infections, so it cannot be submitted on claims. Use a more specific code from this category instead, such as A08.0, A08.11, A08.19, and A08.2.

Code Identity

ICD-10-CM Code
A08
Billable Status
No — Non-Billable Category
Code Describes
Viral and other specified intestinal infections
Chapter
A00-A09
Intestinal infectious diseases

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionA00-A09Intestinal infectious diseases
CategoryA08Viral and other specified intestinal infections
This CodeA08Viral and other specified intestinal infections

Specific Coding for Viral and other specified intestinal infectionsOverview

Non-specific codes like A08 require more characters. Use one of these billable codes instead:

  • Use A08.0 for Rotaviral enteritis

  • A08.1 for Acute gastroenteropathy due to Norwalk agent and other small round viruses

  • Use A08.11 for Acute gastroenteropathy due to Norwalk agent

  • Use A08.19 for Acute gastroenteropathy due to other small round viruses

  • Use A08.2 for Adenoviral enteritis

  • A08.3 for Other viral enteritis

  • Use A08.31 for Calicivirus enteritis

  • Use A08.32 for Astrovirus enteritis

  • Use A08.39 for Other viral enteritis

  • Use A08.4 for Viral intestinal infection, unspecified

  • Use A08.8 for Other specified intestinal infections

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Type 1 Excludes

Patient EducationClinical

Gastroenteritis

Gastroenteritis is an inflammation of the lining of the stomach and intestines. The main symptoms include vomiting and diarrhea. It is usually not serious in healthy people, but it can sometimes lead to dehydration or cause severe symptoms.

The full article covers:

  • What is gastroenteritis?
  • What causes gastroenteritis?
  • What are the symptoms of gastroenteritis?
  • How is gastroenteritis diagnosed?
  • What are the treatments for gastroenteritis?
  • Can gastroenteritis be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About A08Overview

Is A08 (Viral and other specified intestinal infections) a billable code?

No. This is a category header that groups the codes for viral and other specified intestinal infections, and headers cannot be submitted on claims. Claims for viral and other specified intestinal infections need a more specific code from this category, such as A08.0, A08.11, and A08.19.