J21 ICD-10-CM Code: Acute bronchiolitis
A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.
Code definition
Official description
J21Acute bronchiolitis
ICD-10-CM diagnosis code · United States clinical modification
Classification
Where J21 sits
- 1
Chapter 10
Diseases of the respiratory system (J00-J99)
- 2
Section
Other acute lower respiratory infections (J20-J22)
- 3
Category J21
Acute bronchiolitis
- 4
Code J21
Acute bronchiolitis
More specific choices
Codes under J21
J21 is a non-billable category. Choose the child code that best matches the documented diagnosis.
Documentation details
Notes for this code
Inclusion terms
No inclusion terms are listed for J21.
Code first
No “code first” instruction is listed for J21.
Use additional code
No “use additional code” instruction is listed for J21.
Excludes1
Conditions that should not be reported together with this code.
No Excludes1 note is listed for J21.
Excludes2
Conditions not included here that may be reported separately when present.
- respiratory bronchiolitis interstitial lung disease (J84.115)
Transparency
Source and release
This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.
Review the CDC/NCHS ICD-10-CM sourceCode-specific guidance
Frequently asked questions
What does ICD-10-CM code J21 mean?
J21 is the FY 2027 U.S. ICD-10-CM code for “Acute bronchiolitis.”
Is J21 a billable or specific ICD-10-CM code?
No. J21 has more specific child codes in the FY 2027 reference data. Select the code that matches the documentation and confirm the active code set and payer requirements.
Where is J21 located in ICD-10-CM?
J21 is listed in Chapter 10, Diseases of the respiratory system (J00-J99), within Other acute lower respiratory infections (J20-J22) (J20–J22), under category J21, Acute bronchiolitis.
What coding notes are listed for J21?
No inclusion terms are listed for J21 in this reference record. No code-first instruction is listed. No Excludes1 note is listed. Excludes2 notes: respiratory bronchiolitis interstitial lung disease (J84.115).
Ready to transform your clinical documentation?
Join Vero and see how effortless documentation can be.
No credit card required
Cancel anytime