The Contrast Low Osmolar is identified by number "1" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to B5021
Plain Radiography of Intracranial Sinuses using Oth Contrast
Plain Radiography of Intracran Sinus using L Osm Contrast
Plain Radiography of Intracran Sinus using H Osm Contrast