ICD-10 Code J20 – Acute bronchitis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J20 – Acute bronchitis
What it is
J20 identifies acute bronchitis, an acute infection or inflammation of the bronchi. Use it when the record documents bronchitis with a short, recent course rather than chronic airway disease.
Clinical signs
Typical findings include cough, mucus production, and chest discomfort, sometimes with wheezing or low-grade fever. Clinical features vary; refer to documentation.
When to use this code
Use J20 when the provider clearly diagnoses acute bronchitis and does not document a more specific organism or another lower respiratory condition. It also fits follow-up notes that still describe an active acute bronchitic episode. Check documentation if the record suggests pneumonia, asthma, or chronic bronchitis instead.
Do not use for
Do not use J20 for chronic bronchitis, bronchiectasis, or pneumonia. If the note supports a different respiratory diagnosis, code that condition instead.
Coding tip
Look for the provider’s final diagnosis and any documented organism before assigning J20.