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 B4020Z
Plain Radiography of Hepatic Artery using H Osm Contrast
Plain Radiography of Hepatic Artery using L Osm Contrast
Plain Radiography of Hepatic Artery using Other Contrast