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 BW38Z
MRI of Head using Oth Contrast, Unenh, Enhance
Magnetic Resonance Imaging (MRI) of Head
Magnetic Resonance Imaging (MRI) of Head using Oth Contrast