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 C020FZ
Tomo Nucl Med Imag of Brain using Oth Radionuclide
Tomo Nucl Med Imag of Brain using Technetium 99m
Tomo Nucl Med Imag of Brain using Thallium 201
Tomo Nucl Med Imag of Brain using Iodine 123