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 CH211Z
Tomo Nucl Med Imag of L Breast using Oth Radionuclide
Tomo Nucl Med Imag of L Breast using Thallium 201
Tomo Nucl Med Imag of L Breast using Technetium 99m