The Isotope None is identified by letter "Z" and occupies the 6th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to DB28HZ
Stereotactic Particulate Radiosurgery of Diaphragm
Stereotactic Other Photon Radiosurgery of Diaphragm
Stereotactic Gamma Beam Radiosurgery of Diaphragm