The Contrast None is identified by letter "Z" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to BT00Z
Plain Radiography of Bladder
Plain Radiography of Bladder using High Osmolar Contrast
Plain Radiography of Bladder using Other Contrast
Plain Radiography of Bladder using Low Osmolar Contrast