The Body Part Breast, Left is identified by number "1" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to CH21
Tomo Nucl Med Imag of L Breast using Technetium 99m
Tomo Nucl Med Imag of L Breast using Thallium 201
Tomo Nucl Med Imag of L Breast using Oth Radionuclide