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
Includes
- •acute bronchiolitis with bronchospasm
Excludes2 — not included here
- •respiratory bronchiolitis interstitial lung disease (J84.115)
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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