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 BT04Z
Radiography of Kidney, Ureter & Bladder using L Osm Contrast
Radiography of Kidney, Ureter & Bladder using H Osm Contrast
Plain Radiography of Kidneys, Ureters and Bladder
Radiography of Kidney, Ureter & Bladder using Oth Contrast