Pulmonary diagnostic testing and therapies play a crucial role in assessing and treating respiratory conditions. To standardize the reporting of these procedures, the Current Procedural Terminology (CPT) codes provide a structured system. In this article, we will explore some common CPT codes associated with pulmonary diagnostic testing and therapies, including bronchoscopy, thoracentesis, pulmonary function tests (PFTs), exercise stress testing, polysomnography/sleep studies, thoracoscopy, and lung biopsy.