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 BG34ZZ
Magnetic Resonance Imaging (MRI) of Thyroid Gland
MRI of Thyroid Gland using Oth Contrast
MRI of Thyroid Gland using Oth Contrast, Unenh, Enhance