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 D8001
Beam Radiation of Eye using Electrons, Intraoperative
Beam Radiation of Eye using Electrons
Beam Radiation of Eye using Neutrons
Beam Radiation of Eye using Heavy Particles (Protons,Ions)
Beam Radiation of Eye using Photons <1 MeV
Beam Radiation of Eye using Photons >10 MeV
Beam Radiation of Eye using Photons 1 - 10 MeV
Beam Radiation of Eye using Neutron Capture