2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Neoplasms 140-239 > Malignant Neoplasm Of Respiratory And Intrathoracic Organs 160-165 > ICD-9-CM Diagnosis 165 Malignant neoplasm of other and ill-defined sites within the respiratory system and intrathoracic organs 165 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 165.0 Malignant neoplasm of upper respiratory tract part unspecified 165.0 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 165.8 Malignant neoplasm of other sites within the respiratory system and intrathoracic organs 165.8 is a specific code that can be used to specify a diagnosis ICD-9-CM Diagnosis 165.9 Malignant neoplasm of ill-defined sites within the respiratory system Malignant neoplasms originating in the respiratory tract 165.9 is a specific code that can be used to specify a diagnosis