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 B539YZ
MRI of Inf Vena Cava using Oth Contrast, Unenh, Enhance
Magnetic Resonance Imaging (MRI) of Inferior Vena Cava
MRI of Inf Vena Cava using Oth Contrast