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 C22GSZ
Tomo Nucl Med Imag of Myocardium using Indium 111
Tomo Nucl Med Imag of Myocardium using Thallium 201
Tomo Nucl Med Imag of Myocardium using Technetium 99m
Tomographic (Tomo) Nuclear Medicine Imaging of Myocardium
Tomo Nucl Med Imag of Myocardium using Oth Radionuclide
Tomo Nucl Med Imag of Myocardium using Fluorine 18