A08.4 Viral intestinal infection, unspecified

The ICD-10-CM code for Viral intestinal infection, unspecified is A08.4 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

1: Certain infectious and parasitic diseases (A00-B99)

Section

A00-A09: Intestinal infectious diseases (A00-A09)

Category A08

12 codes (9 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to A08.4:

• Gastritis (simple) › viral NEC
• Gastroenteritis (acute) (chronic) (noninfectious) › viral NEC
• Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › viral
• Dysentery, dysenteric (catarrhal) (diarrhea) (epidemic) (hemorrhagic) (infectious) (sporadic) (tropical) › viral
• Gastroduodenitis › virus, viral
• Flu › intestinal NEC
• Enteritis (acute) (diarrheal) (hemorrhagic) (noninfective) › infectious NOS › due to › virus NEC

Inclusion Terms

• Viral enteritis NOS
• Viral gastroenteritis NOS
• Viral gastroenteropathy NOS

U.S. Hospital Utilization

• An estimated 82,100 U.S. inpatient stays in 2023 included A08.4 among the documented diagnoses.
• 30,920 stays listed it as the principal diagnosis.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

HIV Infections (TOC entry)

a. Human Immunodeficiency Virus (HIV) Infections .............................................................. 19

Infectious agents causing diseases in other chapters (TOC)

b. Infectious agents as the cause of diseases classified to other chapters ................................. 22

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)

Cite This Page

Reference A08.4 with the canonical source and edition:

A08.4 — Viral intestinal infection, unspecified. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/A08.4

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