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 DB020Z
Beam Radiation of Lung using Heavy Particles (Protons,Ions)
Beam Radiation of Lung using Photons 1 - 10 MeV
Beam Radiation of Lung using Neutrons
Beam Radiation of Lung using Photons >10 MeV
Beam Radiation of Lung using Electrons, Intraoperative
Beam Radiation of Lung using Electrons
Beam Radiation of Lung using Neutron Capture
Beam Radiation of Lung using Photons <1 MeV