Modifier -PD (diagnostic or related nondiagnostic item or service provided in a wholly owned or wholly operated entity to a patient who is admitted as an inpatient within three days or one day) is now included in the I/OCE, according to January updates detailed in Transmittal 2370.
The respiratory system, responsible for inspiration (carrying oxygen into the body) and expiration (the expulsion of carbon dioxide), is composed of two tracts: the upper respiratory tract and the lower respiratory tract.
