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 B50NYZ
Plain Radiography of L Up Extrem Vein using L Osm Contrast
Plain Radiography of L Up Extrem Vein using Oth Contrast
Plain Radiography of L Up Extrem Vein using H Osm Contrast