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 B03CZ
Magnetic Resonance Imaging (MRI) of Acoustic Nerves
MRI of Acoustic Nerve using Oth Contrast, Unenh, Enhance
MRI of Acoustic Nerve using Oth Contrast