The Contrast None is identified by letter "Z" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to B420Z
CT Scan of Abd Aorta using L Osm Contrast
CT Scan of Abd Aorta using Oth Contrast
CT Scan of Abd Aorta using H Osm Contrast
CT Scan of Abd Aorta using Intravasc Optic Cohere
Computerized Tomography (CT Scan) of Abdominal Aorta