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 C75NYZ
Nonimag Nucl Med Prob Up Extrem Lymph w Oth Radionuclide
Nonimag Nucl Med Prob Up Extrem Lymph w Technetium 99m