The Modality Qualifier Photons 1 is identified by number "1" and occupies the 5th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to D0001
Beam Radiation of Brain using Photons <1 MeV
Beam Radiation of Brain using Electrons, Intraoperative
Beam Radiation of Brain using Neutrons
Beam Radiation of Brain using Photons 1 - 10 MeV
Beam Radiation of Brain using Electrons
Beam Radiation of Brain using Photons >10 MeV
Beam Radiation of Brain using Heavy Particles (Protons,Ions)
Beam Radiation of Brain using Neutron Capture