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 CT63F
Nonimaging Nuclear Medicine Assay of KUB using Iodine 123
Nonimaging Nuclear Medicine Assay of KUB using Iodine 131
Nonimaging Nuclear Medicine Assay of KUB using Iodine 125
Nonimag Nucl Med Assay of KUB using Technetium 99m
Nonimag Nucl Med Assay of KUB using Oth Radionuclide