2007 ICD-9-CM Procedure 93.91 Intermittent positive pressure breathing [ippb] Application of positive pressure to the inspiratory phase of spontaneous respiration. 93.91 is a specific code that can be used to specify a procedure 93.91 contains 5 index entries View the full Volume 3 93.* hierarchy Index entries containing 93.91: Intermittent positive pressure breathing (IPPB) 93.91 Therapy intermittent positive pressure breathing (IPPB) 93.91 IPPB (intermittent positive pressure breathing) 93.91 respiratory NEC 93.99 intermittent positive pressure breathing [IPPB] 93.91 Ventilation intermittent positive pressure breathing [IPPB] 93.91