212 Benign neoplasm of respiratory and intrathoracic organs 
212.0 Benign neoplasm of nasal cavities, middle ear, and accessory sinuses convert 212.0 to ICD-10-CM 212.1 Benign neoplasm of larynx convert 212.1 to ICD-10-CM 212.2 Benign neoplasm of trachea convert 212.2 to ICD-10-CM 212.3 Benign neoplasm of bronchus and lung convert 212.3 to ICD-10-CM 212.4 Benign neoplasm of pleura convert 212.4 to ICD-10-CM 212.5 Benign neoplasm of mediastinum convert 212.5 to ICD-10-CM 212.6 Benign neoplasm of thymus convert 212.6 to ICD-10-CM 212.7 Benign neoplasm of heart convert 212.7 to ICD-10-CM 212.8 Benign neoplasm of other specified sites of respiratory and intrathoracic organs convert 212.8 to ICD-10-CM
212.9 Benign neoplasm of respiratory and intrathoracic organs, site unspecified convert 212.9 to ICD-10-CM