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 D0000Z
Beam Radiation of Brain using Photons >10 MeV
Beam Radiation of Brain using Neutron Capture
Beam Radiation of Brain using Neutrons
Beam Radiation of Brain using Photons <1 MeV
Beam Radiation of Brain using Electrons, Intraoperative
Beam Radiation of Brain using Photons 1 - 10 MeV
Beam Radiation of Brain using Heavy Particles (Protons,Ions)
Beam Radiation of Brain using Electrons