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 B53BZ
MRI of R Low Extrem Vein using Oth Contrast
Magnetic Resonance Imaging (MRI) of R Low Extrem Vein
MRI of R Low Extrem Vein using Oth Contrast, Unenh, Enhance