ICD-10 Code J20.0 – Acute bronchitis due to Mycoplasma pneumoniae (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J20.0 – Acute bronchitis due to Mycoplasma pneumoniae
What it is
J20.0 identifies acute bronchitis caused by Mycoplasma pneumoniae. Use it when the record documents this organism as the cause of an acute lower respiratory infection.
Clinical signs
Typical findings include acute cough, chest discomfort, and bronchial inflammation, sometimes with sputum production. Clinical features vary; refer to documentation for the confirmed infectious cause.
When to use this code
Use J20.0 when the provider explicitly links acute bronchitis to Mycoplasma pneumoniae. It fits outpatient, emergency, or inpatient records that document the organism or a confirmed diagnosis. If the note only says bronchitis without a cause, do not assume this code.
Do not use for
Do not use this code for unspecified acute bronchitis, chronic bronchitis, or pneumonia without bronchitis. Check documentation if the record names Mycoplasma but does not clearly identify acute bronchitis.
Coding tip
Assign J20.0 only when the causal organism is documented; otherwise, code the bronchitis type and etiology separately if supported.