The Treatment Site Brain Stem 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 D021
Stereotactic Other Photon Radiosurgery of Brain Stem
Stereotactic Gamma Beam Radiosurgery of Brain Stem
Stereotactic Particulate Radiosurgery of Brain Stem