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 B421YZ
CT Scan of Celiac Art using L Osm Contrast
CT Scan of Celiac Art using H Osm Contrast
CT Scan of Celiac Art using Intravasc Optic Cohere
CT Scan of Celiac Art using Oth Contrast
Computerized Tomography (CT Scan) of Celiac Artery