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 BU3BZ
Magnetic Resonance Imaging (MRI) of Pregnant Uterus
MRI of Pregnant Uterus using Oth Contrast
MRI of Pregnant Uterus using Oth Contrast, Unenh, Enhance