ICD-10 Code J15.7 – Pneumonia due to Mycoplasma pneumoniae (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J15.7 – Pneumonia due to Mycoplasma pneumoniae
What it is
J15.7 identifies pneumonia caused by Mycoplasma pneumoniae, an atypical bacterial infection of the lungs. Use it when the provider documents this organism as the cause of the pneumonia.
Clinical signs
Clinical features vary; refer to documentation. Common findings include cough, fever, and respiratory symptoms consistent with pneumonia, with Mycoplasma often described as an atypical presentation.
When to use this code
Use J15.7 when the medical record clearly links pneumonia to Mycoplasma pneumoniae. It is appropriate for confirmed or provider-documented presumed causation, as long as the diagnosis is stated in the chart.
If the note says only “pneumonia” without an organism, choose a more general pneumonia code. Check documentation when the organism is mentioned but the relationship to pneumonia is unclear.
Do not use for
Do not use this code for bronchitis, upper respiratory infection, or pneumonia caused by another organism. Do not assign it when Mycoplasma is listed without a documented diagnosis of pneumonia.
Coding tip
Look for explicit provider wording such as “pneumonia due to Mycoplasma pneumoniae” before selecting J15.7.