The Radionuclide Iodine 123 (I is identified by letter "F" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to CG42F
Nonimag Nucl Med Uptake of Thyroid Gland using Iodine 131
Nonimag Nucl Med Uptake of Thyroid Gland using Iodine 123
Nonimag Nucl Med Uptake Thyroid Gland w Technetium 99m
Nonimag Nucl Med Uptake Thyroid Gland w Oth Radionuclide