Question: Code manager describes 31725 as "therapeutic aspiration of the trachea or bronchial tree with a catheter." Should I use this code for suctioning the airway such as via endotracheal tube (ETT) or tracheotomy tube or for nasotracheal (NT) suctioning? Florida Subscriber Answer: No. CPT limits 31725 (Catheter aspiration [separate procedure]; tracheobronchial with fiberscope, bedside) to a fiberoptic bronchoscope. Use the code for catheter aspiration of the tracheobronchial tree at bedside. For aspiration through the nasotracheal area, use 31720 (Catheter aspiration [separate procedure]; nasotracheal).