From: Estimates of hospitalization attributable to influenza and RSV in the US during 1997–2009, by age and risk status
Outcome
ICD9 codes
Pneumonia and influenza
480-488
Respiratory broad
460-519, 079, 786.0-786.4, 786.7-786.9
Respiratory
460-519
Cardiorespiratory disease
390-519
Sepsis
038, 771.81