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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*3Comments to Author 
Author affiliations: *Walter Reed Army Institute of Research, Silver Spring, Maryland, USA; †Air Force Institute for Operational Health, Brooks City Base, Texas, USA;

Main Article

Table 1

Original set of 29 ICD-9 codes included in the influenzalike illness syndrome in ESSENCE*

ICD-9 codeDescriptionSpecificity 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
786.2Cough4

*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.

Main Article

1Current affiliation: Tacoma–Pierce County Health Department, Tacoma, Washington, USA

2Current affiliation: US Census Bureau, Suitland, Maryland, USA

3Current affiliation: Uniformed Services University of the Health Sciences, Bethesda, Maryland, USA

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