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 B50QYZ
Plain Radiography of R Pulm Vein using L Osm Contrast
Plain Radiography of Right Pulmonary Vein using Oth Contrast
Plain Radiography of R Pulm Vein using H Osm Contrast