Table 1.
ICD‐9 Codes used for Influenza‐Like Illness12
| ICD‐9 code | Illness description | icd‐9 code | Illness description |
|---|---|---|---|
| 079.89 | Viral Infection NEC | 466 | Acute bronchitis and bronchiolitis |
| 079.99 | Viral Infection NOS | 466.0 | Acute bronchitis |
| 460 | Acute Nasopharyngitis | 466.1 | Acute bronchiolitis |
| 462 | Acute pharyngitis | 466.19 | Acute bronchiolitis due to other infectious organism |
| 464 | Acute Laryngitis and tracheitis | 478.9 | Other and unspecified diseases of upper resp tract |
| 464.0 | Acute Laryngitis | 480 | Viral pneumonia |
| 464.1 | Acute tracheitis | 487 | Influenza |
| 464.10 | Acute tracheitis w/o obstruction | 487.0 | Influenza with pneumonia |
| 464.2 | Acute Laryngotracheitis | 487.1 | Influenza with other respiratory manifestation |
| 464.20 | Acute Laryngotracheitis w/o obstruction | 487.8 | Influenza with other manifestation |
| 465 | Upper respiratory infection multiple or unspecified sites | 490 | Bronchitis not specified as acute or chronic |
| 465.0 | Acute laryngopharyngitis | 780.6 | Fever |
| 465.8 | Upper resp infection multiple sites | 784.1 | Throat pain |
| 465.9 | Upper resp infection of unspecified sites | 786.2 | Cough |