J21 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Acute bronchiolitis.
Includes
Acute bronchiolitis with bronchospasm
Type 2 excludes
Respiratory bronchiolitis interstitial lung disease (J84.115)
Codes
Versions
2026
No changes
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code