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 D8006Z
Beam Radiation of Eye using Neutrons
Beam Radiation of Eye using Heavy Particles (Protons,Ions)
Beam Radiation of Eye using Photons 1 - 10 MeV
Beam Radiation of Eye using Photons <1 MeV
Beam Radiation of Eye using Electrons
Beam Radiation of Eye using Neutron Capture
Beam Radiation of Eye using Electrons, Intraoperative
Beam Radiation of Eye using Photons >10 MeV