The Radionuclide Iodine 131 (I is identified by letter "G" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to CW7GG
Sys Nucl Med Therapy of Thyroid using Iodine 131
Sys Nucl Med Therapy of Thyroid using Oth Radionuclide