The Treatment Site Chest is identified by number "2" and occupies the 4th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to DW22
Stereotactic Other Photon Radiosurgery of Chest
Stereotactic Gamma Beam Radiosurgery of Chest
Stereotactic Particulate Radiosurgery of Chest