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 B33HZ
MRI of R Up Extrem Art using Oth Contrast
Magnetic Resonance Imaging (MRI) of R Up Extrem Art
MRI of R Up Extrem Art using Oth Contrast, Unenh, Enhance