2006 ICD-9-CM Volume 1 Diagnosis Codes > Diseases Of The Respiratory System 460-519 > Pneumoconioses And Other Lung Diseases Due To External Agents 500-508 > 500 Coal workers' pneumoconiosis 501 Asbestosis 502 Pneumoconiosis due to other silica or silicates 503 Pneumoconiosis due to other inorganic dust 504 Pneumonopathy due to inhalation of other dust 505 Pneumoconiosis unspecified 506 Respiratory conditions due to chemical fumes and vapors 507 Pneumonitis due to solids and liquids 508 Respiratory conditions due to other and unspecified external agents