The Treatment Site Mouth is identified by number "4" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to D924
Stereotactic Other Photon Radiosurgery of Mouth
Stereotactic Gamma Beam Radiosurgery of Mouth
Stereotactic Particulate Radiosurgery of Mouth