The Treatment Site Head and Neck is identified by number "1" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to DW21
Stereotactic Particulate Radiosurgery of Head and Neck
Stereotactic Other Photon Radiosurgery of Head and Neck
Stereotactic Gamma Beam Radiosurgery of Head and Neck