ICD-10 Code J20.9 – Acute bronchitis, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J20.9 – Acute bronchitis, unspecified
What it is
J20.9 identifies acute bronchitis when the provider documents bronchitis of short duration but does not name the causative organism. It is used for an acute inflammation of the bronchial tubes without a more specific subtype.
Clinical signs
Common findings include cough, sputum production, chest discomfort, and wheezing or rhonchi. Clinical features vary; refer to documentation, and confirm that the episode is acute rather than chronic.
When to use this code
Use J20.9 when the record clearly states acute bronchitis and no organism, such as viral or bacterial, is documented. It also fits when the note says bronchitis but gives no additional qualifying detail. If the provider later specifies a cause, code the more specific diagnosis instead.
Do not use for
Do not use this code for chronic bronchitis, bronchitis with an identified organism, or pneumonia. Check documentation if the note describes another lower respiratory infection or a chronic respiratory condition.
Coding tip
Query for the cause when the chart mentions acute bronchitis but the etiology is unclear.