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 BH3JZ
Magnetic Resonance Imaging (MRI) of Low Extrem Subcu
MRI of Low Extrem Subcu using Oth Contrast
MRI of Low Extrem Subcu using Oth Contrast, Unenh, Enhance