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 BG34Z
MRI of Thyroid Gland using Oth Contrast, Unenh, Enhance
MRI of Thyroid Gland using Oth Contrast
Magnetic Resonance Imaging (MRI) of Thyroid Gland