J21
Non-billableAcute bronchiolitis
J21 is the ICD-10-CM code for Acute bronchiolitis. It is a non-billable category code — use a more specific child code such as J21.0 for billing.
- Status
- Header (non-billable)
- Chapter
- J00-J99
- Subcodes
- 4
- Edition
- FY2026
J00-J99 Diseases of the respiratory system
What this means — in plain language
MedlinePlus · NIHWhen you breathe in, the air travels down through your trachea (windpipe). It then goes through two tubes to your lungs. These tubes are your bronchi. Bronchial disorders can make it hard for you to breathe. The most common problem with the bronchi is bronchitis, an inflammation of the tubes. It can be acute or chronic . Other problems include: Bronchiectasis - a condition in which damage to the airways causes them…
Read more about Bronchial Disorders at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Includes
- •acute bronchiolitis with bronchospasm
Excludes2 — not included here
- •respiratory bronchiolitis interstitial lung disease (J84.115)
Medications indicated for this condition
FDA labeling- RibavirinNucleoside Analog Antiviral [EPC]›
- NirsevimabRespiratory Syncytial Virus Anti-F Protein Monoclonal Antibody [EPC]›
- PalivizumabRespiratory Syncytial Virus Anti-F Protein Monoclonal Antibody [EPC]›
Drugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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