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 CW53DZ
Nonimag Nucl Med Prob of Chest using Technetium 99m
Nonimag Nucl Med Prob of Chest using Oth Radionuclide
Nonimaging Nuclear Medicine Probe of Chest using Indium 111