Table 1. Diagnostic Codes Defined as Acute Bronchiolitis, Other Acute Airway Infections and Asthma of the Enrolled Children.
| ICD-9-CM Code | Diagnosis |
|---|---|
| Acute bronchiolitis | |
| 466.1 | Acute bronchiolitis |
| Other acute airway infections | |
| 464.1 | Acute tracheitis |
| 464.2 | Acute laryngotracheitis |
| 464.3 | Acute epiglottitis |
| 464.4 | Croup |
| 464.5 | Supraglottitis, unspecified |
| 466.0 | Acute bronchitis |
| 480 | Viral pneumonia |
| 481 | Pneumococcal pneumonia |
| 482 | Other bacteria pneumonia |
| 483 | Pneumonia-other specified organism |
| 484 | Pneumonia in infectious disease classified elsewhere |
| 485 | Bronchopneumonia, organism unspecified |
| 486 | Pneumonia, organism unspecified |
| Asthma | |
| 493 | Asthma |
aBased on International Classification of Diseases, 9th Revision, Clinical Modification (ICD-9-CM) code.