2007 ICD-9-CM Procedure 34.21 Transpleural thoracoscopy Endoscopic examination, therapy or surgery of the pleural cavity. The use of a thin, lighted tube (called an endoscope) to examine the inside of the chest. 34.21 is a specific code that can be used to specify a procedure 34.21 contains 4 index entries View the full Volume 3 34.* hierarchy Index entries containing 34.21: Cavernoscopy 34.21 Endoscopy thorax (transpleural) 34.21 transpleural thorax 34.21 Thoracoscopy, transpleural (for exploration) 34.21