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 CG14G
Planar Nucl Med Imag Bi Adrenal Gland w Oth Radionuclide
Planar Nucl Med Imag of Bi Adrenal Gland using Iodine 131