2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Respiratory System 460-519 > Pneumoconioses And Other Lung Diseases Due To External Agents 500-508 > ICD-9-CM Diagnosis 508 Respiratory conditions due to other and unspecified external agents 508 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 508.0 Acute pulmonary manifestations due to radiation Injurious effects of radiotherapy on the lungs. There are three phases in the reaction of the lungs to radiation injury: an acute phase occurring 1 to 2 months after exposure, a subacute phase 2 to 9 months after exposure, and a chronic or fibrotic phase more than 9 months after exposure. In the acute phase there is vascular damage, congestion, edema, and mononuclear cell infiltration; in the subacute phase the alveolar walls are infiltrated with mononuclear inflammatory cells and fibroblasts; in the chronic phase, alveolar fibrosis and capillary sclerosis take place. 508.0 is a specific code that can be used to specify a diagnosis 508.0 contains 7 index entries ICD-9-CM Diagnosis 508.1 Chronic and other pulmonary manifestations due to radiation 508.1 is a specific code that can be used to specify a diagnosis 508.1 contains 6 index entries ICD-9-CM Diagnosis 508.8 Respiratory conditions due to other specified external agents 508.8 is a specific code that can be used to specify a diagnosis 508.8 contains 9 index entries ICD-9-CM Diagnosis 508.9 Respiratory conditions due to unspecified external agent 508.9 is a specific code that can be used to specify a diagnosis 508.9 contains 9 index entries