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 B330YZ
MRI of Thoracic Aorta using Oth Contrast, Unenh, Enhance
MRI of Thoracic Aorta using Oth Contrast
Magnetic Resonance Imaging (MRI) of Thoracic Aorta