J21 vs J84.115
J21 (Acute bronchiolitis) compared with J84.115 (Respiratory bronchiolitis interstitial lung disease), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).
Can these codes be reported together?
Yes, when both are documented. J21 carries an Excludes2 note covering J84.115: “respiratory bronchiolitis interstitial lung disease (J84.115)”
Excludes2 marks distinct conditions — both may be reported when both are documented.
Side by side
| J21Acute bronchiolitis | J84.115Respiratory bronchiolitis interstitial lung disease | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | J00-J99 — Diseases of the Respiratory System (J00-J99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Acute bronchiolitis is a non-billable ICD-10-CM category code (J21). | Respiratory bronchiolitis interstitial lung disease is a billable ICD-10-CM diagnosis code (J84.115). |
| Includes | acute bronchiolitis with bronchospasm | — |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources