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 B50R1
Plain Radiography of L Pulm Vein using L Osm Contrast
Plain Radiography of Left Pulmonary Vein using Oth Contrast
Plain Radiography of L Pulm Vein using H Osm Contrast