The Qualifier None is identified by letter "Z" and occupies the 6th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to B50RYZ
Plain Radiography of L Pulm Vein using L Osm Contrast
Plain Radiography of L Pulm Vein using H Osm Contrast
Plain Radiography of Left Pulmonary Vein using Oth Contrast