2006 ICD-9-CM Volume 1 Diagnosis Codes > Diseases Of The Respiratory System 460-519 460-466 Acute respiratory infections 470-478 Other diseases of upper respiratory tract 480-487 Pneumonia and influenza 490-496 Chronic obstructive pulmonary disease and allied conditions 500-508 Pneumoconioses and other lung diseases due to external agents 510-519 Other diseases of respiratory system