The Qualifier None is identified by letter "Z" and occupies the 6th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to BW38YZ
MRI of Head using Oth Contrast, Unenh, Enhance
Magnetic Resonance Imaging (MRI) of Head using Oth Contrast
Magnetic Resonance Imaging (MRI) of Head