ICD-10-CM > C00-D49 > C30-C39 > C39 C39 Malignant neoplasm of other and ill-defined sites in the respiratory system and intrathoracic organs Non-Billable/Non-Specific Use Additional code to identify:exposure to environmental tobacco smoke (Z77.22)exposure to tobacco smoke in the perinatal period (P96.81)history of tobacco dependence (Z87.891)occupational exposure to environmental tobacco smoke (Z57.31)tobacco dependence (F17.-)tobacco use (Z72.0) Type 1 Excludes intrathoracic malignant neoplasm NOS (C76.1)thoracic malignant neoplasm NOS (C76.1) Codes C39.0Malignant neoplasm of upper respiratory tract, part unspecifiedC39.9Malignant neoplasm of lower respiratory tract, part unspecified