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 BT05Z
Plain Radiography of Urethra using Other Contrast
Plain Radiography of Urethra using High Osmolar Contrast
Plain Radiography of Urethra
Plain Radiography of Urethra using Low Osmolar Contrast