ICD-10 Code J10.0 – Influenza due to other identified influenza virus with pneumonia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J10.0 – Influenza due to other identified influenza virus with pneumonia
What it is
This code identifies influenza caused by an identified influenza virus other than seasonal unspecified types, when pneumonia is also present. Use it when the record clearly links the influenza infection to pneumonia.
Clinical signs
Typical findings include influenza-like illness with cough, fever, and respiratory symptoms, plus clinical or radiographic evidence of pneumonia. Clinical features vary; refer to documentation.
When to use this code
Use J10.0 when the provider documents influenza from an identified influenza virus and pneumonia in the same encounter. It fits cases where the pneumonia is part of the influenza illness, not a separate diagnosis. Check documentation for the specific virus if stated.
Do not use for
Do not use this code for influenza without pneumonia, or when the virus is not identified. If pneumonia is documented without a clear influenza link, code the conditions separately as supported by the record.
Coding tip
Verify that the chart names an identified influenza virus and explicitly associates pneumonia with the influenza infection.