J21.9 is a billable/specific diagnosis code from the 2025 ICD-10-CM used to classify the following condition: Acute bronchiolitis, unspecified.
Inclusion term
Bronchiolitis (acute)
Type 1 excludes
Chronic bronchiolitis (J44.89)
Versions
2025
Code changed
Type 1 excludes
chronic bronchiolitis (J44.-)
- chronic bronchiolitis (J44.89)
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