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 B936Z
Magnetic Resonance Imaging (MRI) of Bilateral Parotid Glands
MRI of Bi Parotid Gland using Oth Contrast
MRI of Bi Parotid Gland using Oth Contrast, Unenh, Enhance