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Volume 12, Number 10—October 2006

Letter

ICD-9 Codes for Identifying Influenza Hospitalizations in Children

Ron Keren*Comments to Author , Anna Wheeler*, Susan E. Coffin*, Theoklis Zaoutis*, Richard Hodinka*, and Kateri Heydon*
Author affiliations: *The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA

Main Article

Table

Influenza-specific admission or discharge ICD-9 codes (487.0, 487.1, and 487.8.) compared with influenza laboratory test results*

Parameter LCI No LCI Total
Influenza-specific diagnosis codes 463 66 529
No influenza-specific diagnosis codes 252
Total 715

*ICD-9, International Classification of Diseases-9; LCI, laboratory-confirmed influenza. The sensitivity and positive predictive value of influenza-specific diagnosis codes were 65% and 88%, respectively.

*ICD-9, International Classification of Diseases-9; LCI, laboratory-confirmed influenza. The sensitivity and positive predictive value of influenza-specific diagnosis codes were 65% and 88%, respectively.

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