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 BT03Z
Plain Radiography of Bilateral Kidneys using Other Contrast
Plain Radiography of Bilateral Kidneys
Plain Radiography of Bilateral Kidneys using H Osm Contrast
Plain Radiography of Bilateral Kidneys using L Osm Contrast