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 D90F1
Beam Radiation of Oropharynx using Photons >10 MeV
Beam Radiation of Oropharynx using Electrons
Beam Radiation of Oropharynx using Photons <1 MeV
Beam Radiation of Oropharynx using Heavy Particles
Beam Radiation of Oropharynx using Electrons, Intraoperative
Beam Radiation of Oropharynx using Neutron Capture
Beam Radiation of Oropharynx using Neutrons
Beam Radiation of Oropharynx using Photons 1 - 10 MeV