ICD-10 Code J15 – Bacterial pneumonia, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J15 – Bacterial pneumonia, not elsewhere classified
What it is
J15 identifies bacterial pneumonia that is not classified elsewhere. Use it when the record documents a bacterial lung infection but does not name a more specific organism or category.
Clinical signs
Typical findings include cough, fever, shortness of breath, and chest imaging consistent with pneumonia. Clinical features vary; refer to documentation for the organism, severity, and whether the infection is community or hospital acquired.
When to use this code
Use J15 when the provider documents bacterial pneumonia without a more specific ICD-10 option. It also fits cases where the bacterial cause is known, but the chart does not support a more detailed code. Check documentation if the note mentions aspiration, influenza-related, or another named pneumonia type.
Do not use for
Do not use J15 for viral, aspiration, or pneumonia due to other specified organisms when a more specific code is available. Do not assign it if the record only says “pneumonia” and the cause is not documented.
Coding tip
Review the organism and pneumonia type carefully, because J15 is a fallback code only when no more specific bacterial pneumonia code applies.