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 D9031
Beam Radiation of Hypopharynx using Neutron Capture
Beam Radiation of Hypopharynx using Electrons
Beam Radiation of Hypopharynx using Heavy Particles
Beam Radiation of Hypopharynx using Photons <1 MeV
Beam Radiation of Hypopharynx using Photons 1 - 10 MeV
Beam Radiation of Hypopharynx using Electrons, Intraop
Beam Radiation of Hypopharynx using Photons >10 MeV
Beam Radiation of Hypopharynx using Neutrons