ICD-10 Code J13 – Pneumonia due to Streptococcus pneumoniae (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J13 – Pneumonia due to Streptococcus pneumoniae
What it is
J13 identifies pneumonia caused by Streptococcus pneumoniae, also called pneumococcal pneumonia. Use it when the record clearly links the lung infection to this specific bacterium.
Clinical signs
Typical findings include cough, fever, shortness of breath, chest pain, and focal lung infiltrates on imaging. Clinical features vary; refer to documentation.
When to use this code
Use J13 when the provider documents pneumococcal pneumonia, pneumococcal lung infection, or pneumonia due to Streptococcus pneumoniae. The organism should be stated or clearly established in the record. If the note only says pneumonia without an identified cause, check documentation before coding J13.
Do not use for
Do not use J13 for pneumonia caused by another organism or for unspecified pneumonia. Also avoid it when Streptococcus pneumoniae is documented as a carrier state or another diagnosis only.
Coding tip
Code J13 only when the documentation names Streptococcus pneumoniae as the cause of the pneumonia.