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 BB3GZ
MRI of Lung Apices using Oth Contrast
MRI of Lung Apices using Oth Contrast, Unenh, Enhance
Magnetic Resonance Imaging (MRI) of Lung Apices