Volume 13, Number 2—February 2007
Research
Code-based Syndromic Surveillance for Influenzalike Illness by International Classification of Diseases, Ninth Revision
Nicola Marsden-Haug*1, Virginia B. Foster*, Philip L. Gould†, Eugene Elbert*2, Hailiang Wang*, and Julie A. Pavlin*3
Table 1
Original set of 29 ICD-9 codes included in the influenzalike illness syndrome in ESSENCE*
| ICD-9 code | Description | Specificity and severity rank† |
|---|---|---|
| 079.89 | Viral infection NEC* | 4 |
| 079.99 | Viral infection NOS* | 4 |
| 460 | Nasopharyngitis, acute | 4 |
| 462 | Pharyngitis, acute | 4 |
| 464.00 | Laryngitis, acute, without obstruction | 4 |
| 464.10 | Tracheitis, acute, without obstruction | 4 |
| 464.20 | Laryngotracheitis, acute without obstruction | 4 |
| 465.0 | Laryngopharyngitis, acute | 4 |
| 465.8 | Infectious upper respiratory, multiple sites, acute NEC | 4 |
| 465.9 | Infectious upper respiratory, multiple sites, acute NOS | 4 |
| 466.0 | Bronchitis, acute | 3 |
| 466.11 | Bronchiolitis due to respiratory syncytial virus | 3 |
| 466.19 | Bronchiolitis, acute, due to other infectious organism | 3 |
| 478.9 | Disease, upper respiratory NEC/NOS | 4 |
| 480.0 | Pneumonia due to adenovirus | 2 |
| 480.1 | Pneumonia due to respiratory syncytial virus | 2 |
| 480.2 | Pneumonia due to parainfluenza | 2 |
| 480.8 | Pneumonia due to virus NEC | 2 |
| 480.9 | Viral pneumonia unspecified | 2 |
| 484.8 | Pneumonia in other infectious disease NEC | 2 |
| 485 | Bronchopneumonia, organism NOS | 2 |
| 486 | Pneumonia, organism NOS | 2 |
| 487.0 | Influenza with pneumonia | 1 |
| 487.1 | Influenza with respiratory manifestation NEC | 1 |
| 487.8 | Influenza with manifestation NEC | 1 |
| 490 | Bronchitis NOS | 3 |
| 780.6 | Fever | 4 |
| 784.1 | Pain, throat | 4 |
| 786.2 | Cough | 4 |
*ICD-9, International Classification of Diseases, Ninth Revision; ESSENCE, Electronic Surveillance System for the Early Notification of Community-based Epidemics; NOS, not otherwise specified; NEC, not elsewhere classified.
†Specificity and severity rank: 1, most severe or specific; 4, least severe or specific.
