2007 ICD-9-CM Procedure 90.4 Microscopic examination of specimen from trachea, bronchus, pleura, lung, and other thoracic specimen, and of sputum 90.4 is a non-specific code that should not be used to specify a procedure 90.4 contains 8 index entries View the full Volume 3 90.* hierarchy Index entries containing 90.4: Examination (for) microscopic (specimen) (of) 91.9 bronchus 90.4 chest wall 90.4 diaphragm 90.4 lung 90.4 pleura (fluid) 90.4 sputum 90.4 thorax NEC 90.4 trachea 90.4