The Isotope Cesium 137 (Cs is identified by number "7" and occupies the 6th position in the ICD10-PCS procedure code structure.
Below a selection of ICD 10 PCS codes related to D91DB7
LDR Brachytherapy of Nasopharynx using Pd-103, Unidirect
HDR Brachytherapy of Nasopharynx using Californium 252
LDR Brachytherapy of Nasopharynx using Pd-103
HDR Brachytherapy of Nasopharynx using Iridium 192
LDR Brachytherapy of Nasopharynx using Iridium 192
LDR Brachytherapy of Nasopharynx using Oth Isotope
LDR Brachytherapy of Nasopharynx using Cesium 137
LDR Brachytherapy of Nasopharynx using Californium 252
HDR Brachytherapy of Nasopharynx using Cesium 137
HDR Brachytherapy of Nasopharynx using Oth Isotope
LDR Brachytherapy of Nasopharynx using Iodine 125
HDR Brachytherapy of Nasopharynx using Pd-103
HDR Brachytherapy of Nasopharynx using Iodine 125