ICD-10 Code J12.2 – Parainfluenza virus pneumonia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J12.2 – Parainfluenza virus pneumonia
What it is
J12.2 identifies pneumonia caused by parainfluenza virus. Use it when the record documents viral pneumonia due to this specific organism.
Clinical signs
Clinical features vary; refer to documentation. Typical pneumonia findings may include cough, fever, shortness of breath, and imaging evidence of lung infection.
When to use this code
Use J12.2 when the provider clearly documents parainfluenza virus as the cause of pneumonia. It may also fit when the diagnosis is confirmed by testing or stated in the assessment. If the record only says viral respiratory infection or bronchitis, check documentation before coding.
Do not use for
Do not use this code for parainfluenza infection without pneumonia, or for pneumonia caused by another organism. Check documentation if the note describes mixed infections or an unspecified viral pneumonia.
Coding tip
Code the documented organism, and verify that pneumonia—not just upper or lower respiratory infection—is clearly stated.