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 B320YZ
CT Scan of Thoracic Aorta using L Osm Contrast
CT Scan of Thoracic Aorta using Intravasc Optic Cohere
CT Scan of Thoracic Aorta using Oth Contrast
Computerized Tomography (CT Scan) of Thoracic Aorta
CT Scan of Thoracic Aorta using H Osm Contrast