ICD-10 Code B34.2 – Coronavirus infection, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code B34.2 – Coronavirus infection, unspecified
What it is
B34.2 identifies a coronavirus infection when the specific coronavirus type is not documented. Use it for a confirmed viral illness caused by coronavirus, but without a more precise organism or syndrome code.
Clinical signs
Clinical features vary; refer to documentation. Commonly recorded findings include acute respiratory symptoms such as cough, fever, sore throat, or malaise, but the chart should support a coronavirus infection diagnosis.
When to use this code
Use B34.2 when the provider documents coronavirus infection and no more specific coronavirus code applies. It may fit cases where testing or clinical assessment confirms coronavirus, but the record does not name the subtype.
If the note describes a different, more specific diagnosis, code that condition instead. Check documentation when the provider mentions pneumonia, bronchitis, or another defined syndrome.
Do not use for
Do not use this code for COVID-19 unless the record specifically supports that diagnosis and the correct code is assigned. Also avoid it when a more specific coronavirus or respiratory diagnosis is documented.
Coding tip
Code the most specific documented diagnosis first, and use B34.2 only when the record clearly says coronavirus infection without further detail.