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 D7004Z
Beam Radiation of Bone Marrow using Photons <1 MeV
Beam Radiation of Bone Marrow using Photons 1 - 10 MeV
Beam Radiation of Bone Marrow using Heavy Particles
Beam Radiation of Bone Marrow using Electrons, Intraop
Beam Radiation of Bone Marrow using Electrons
Beam Radiation of Bone Marrow using Photons >10 MeV
Beam Radiation of Bone Marrow using Neutron Capture
Beam Radiation of Bone Marrow using Neutrons