ICD-10 Code J10.00 – Influenza due to other identified influenza virus with unspecified type of pneumonia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J10.00 – Influenza due to other identified influenza virus with unspecified type of pneumonia
What it is
This code identifies influenza caused by an identified influenza virus other than seasonal type A or B, with pneumonia present but not further specified. Use it when the record links the influenza infection to pneumonia and does not name the pneumonia type.
Clinical signs
Typical findings include acute influenza symptoms such as fever, cough, sore throat, myalgia, and malaise, with evidence of pneumonia. Clinical features vary; refer to documentation for the pneumonia diagnosis and the specific influenza virus if recorded.
When to use this code
Use J10.00 when the provider documents influenza due to another identified influenza virus and also documents pneumonia, but does not specify the pneumonia type. This applies to confirmed influenza linked to pneumonia in the same encounter. If the note is unclear, check documentation.
Do not use for
Do not use this code for influenza without pneumonia, or when the influenza virus is not identified. Do not use it if the pneumonia type is specified and another code is more accurate.
Coding tip
Code both the identified influenza virus and the documented pneumonia details only when the record supports them.