Table 1. ICD codes for Pneumonia & Influenza.

	Causes used as
Years	Pneumonia & Influenza
1959–1967 (ICD 7)	480–483, 490–493
1968–1978 (ICD 8)	470–474, 480–486
1979–1998 (ICD 9)	480–487
1999–2010 (ICD 10)	J10–J18

Codes from the four revisions of the ICD (International Classification of Diseases) merged to the combined cause “pneumonia and influenza.”