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 CW501Z
Nonimag Nucl Med Prob of Abd using Technetium 99m
Nonimaging Nuclear Medicine Probe of Abd using Indium 111
Nonimag Nucl Med Prob of Abd using Oth Radionuclide