ICD-10 Code B34.1 – Enterovirus infection, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B34.1 – Enterovirus infection, unspecified
What it is
B34.1 identifies an enterovirus infection when the specific virus or site is not documented. Use it for a nonspecific viral illness attributed to enterovirus, not for a more detailed confirmed diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Enterovirus infections may present with fever, rash, sore throat, or other viral symptoms, but you should code only what is documented and supported.
When to use this code
Use B34.1 when the provider documents enterovirus infection without naming the virus type or a more specific diagnosis. It also fits cases where the record confirms enterovirus but does not identify a distinct clinical syndrome. If another condition is documented, code that condition instead.
Do not use for
Do not use this code for specific enteroviral diseases with a defined diagnosis, such as meningitis or hand, foot, and mouth disease. Check documentation if the record names a different viral illness.
Coding tip
Code the highest level of specificity available; if the chart names a specific enterovirus condition, do not default to B34.1.