Code also

any application or administration of an adhesion barrier substance (99.77)

cardiopulmonary bypass [extracorporeal circulation] [heart-lung machine] (39.61)

The following fourth-digit subclassification is for use with appropriate categories in section 38.0, 38.1, 38.3, 38.5, 38.6, 38.8, and 38.9 according to site. Valid fourth-digits are in [brackets] at the end of each code/description.