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 B500YZ
Plain Radiography of Epidural Veins using L Osm Contrast
Plain Radiography of Epidural Veins using Other Contrast
Plain Radiography of Epidural Veins using H Osm Contrast