The ICD-9 code range PNEUMONIA AND INFLUENZA for 480-488 is medical classification list by the World Health Organization (WHO).
Viral pneumonia
Other bacterial pneumonia
Pneumonia due to streptococcus
Pneumonia due to staphylococcus
Pneumonia due to other specified bacteria
Pneumonia due to other specified organism
Pneumonia in infectious diseases classified elsewhere
Influenza
Influenza due to identified avian influenza virus
Influenza due to identified avian influenza virus
Influenza due to identified 2009 H1N1 influenza virus