The Body Part Head and Neck is identified by letter "B" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to CW5B
Nonimag Nucl Med Prob of Head & Neck using Indium 111
Nonimag Nucl Med Prob of Head & Neck using Oth Radionuclide
Nonimag Nucl Med Prob of Head & Neck using Technetium 99m