B34.1 Enterovirus infection, unspecified

The ICD-10-CM code for Enterovirus infection, unspecified is B34.1 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

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

Section

B25-B34: Other viral diseases (B25-B34)

Category B34

8 codes (7 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to B34.1:

• Coxsackie (virus) (infection)
• Infection, infected, infective (opportunistic) › enterovirus
• Disease, diseased › echovirus NEC
• Disease, diseased › enteroviral, enterovirus NEC
• Disease, diseased › coxsackie (virus) NEC
• Infection, infected, infective (opportunistic) › echovirus › unspecified nature or site
• Disease, diseased › nonarthropod-borne NOS (viral) › enterovirus NEC
• Infection, infected, infective (opportunistic) › virus, viral NOS › coxsackie

Inclusion Terms

• Coxsackievirus infection NOS
• Echovirus infection NOS

U.S. Hospital Utilization

• An estimated 18,910 U.S. inpatient stays in 2023 included B34.1 among the documented diagnoses.
• 1,055 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)