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 B30RZ
Plain Radiography of Intracran Art using Oth Contrast
Plain Radiography of Intracran Art using H Osm Contrast
Plain Radiography of Intracran Art using L Osm Contrast
Plain Radiography of Intracranial Arteries