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 BQ0GZ
Plain Radiography of Right Ankle using Low Osmolar Contrast
Plain Radiography of Right Ankle using High Osmolar Contrast
Plain Radiography of Right Ankle using Other Contrast
Plain Radiography of Right Ankle