ICD-10-PCS Tabular Index · Section D · FY 2026 D91
D91 Brachytherapy - Ear, Nose, Mouth and Throat ICD-10-PCS
The D91 code range contains 169 ICD-10-PCS codes for Brachytherapy procedures on the ear, nose, mouth and throat. 168 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
✓ Built from the official CMS FY 2026 datasetEffective Oct 1, 2025 – Sep 30, 2026
169
Procedure Codes
168
Billable Codes
D91
Characters 1–3
D9
Parent Body System
Root Operation Definition
Brachytherapy: A type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor.
ICD-10-PCS
Codes in the D91 Range 169 codes · 168 billable
169 of 169 shown
- D91 Radiation Therapy, Ear, Nose, Mouth and Throat, BrachytherapyNon-billable header
- D91097Z High Dose Rate (HDR) Brachytherapy of Ear using Cesium 137 (Cs-137)
- D91098Z High Dose Rate (HDR) Brachytherapy of Ear using Iridium 192 (Ir-192)
- D91099Z High Dose Rate (HDR) Brachytherapy of Ear using Iodine 125 (I-125)
- D9109BZ High Dose Rate (HDR) Brachytherapy of Ear using Palladium 103 (Pd-103)
- D9109CZ High Dose Rate (HDR) Brachytherapy of Ear using Californium 252 (Cf-252)
- D9109YZ High Dose Rate (HDR) Brachytherapy of Ear using Other Isotope
- D910B6Z Low Dose Rate (LDR) Brachytherapy of Ear using Cesium 131 (Cs-131)
- D910B7Z Low Dose Rate (LDR) Brachytherapy of Ear using Cesium 137 (Cs-137)
- D910B8Z Low Dose Rate (LDR) Brachytherapy of Ear using Iridium 192 (Ir-192)
- D910B9Z Low Dose Rate (LDR) Brachytherapy of Ear using Iodine 125 (I-125)
- D910BB1 Low Dose Rate (LDR) Brachytherapy of Ear using Palladium 103 (Pd-103), Unidirectional Source
- D910BBZ Low Dose Rate (LDR) Brachytherapy of Ear using Palladium 103 (Pd-103)
- D910BCZ Low Dose Rate (LDR) Brachytherapy of Ear using Californium 252 (Cf-252)
- D910BYZ Low Dose Rate (LDR) Brachytherapy of Ear using Other Isotope
- D91197Z High Dose Rate (HDR) Brachytherapy of Nose using Cesium 137 (Cs-137)
- D91198Z High Dose Rate (HDR) Brachytherapy of Nose using Iridium 192 (Ir-192)
- D91199Z High Dose Rate (HDR) Brachytherapy of Nose using Iodine 125 (I-125)
- D9119BZ High Dose Rate (HDR) Brachytherapy of Nose using Palladium 103 (Pd-103)
- D9119CZ High Dose Rate (HDR) Brachytherapy of Nose using Californium 252 (Cf-252)
- D9119YZ High Dose Rate (HDR) Brachytherapy of Nose using Other Isotope
- D911B6Z Low Dose Rate (LDR) Brachytherapy of Nose using Cesium 131 (Cs-131)
- D911B7Z Low Dose Rate (LDR) Brachytherapy of Nose using Cesium 137 (Cs-137)
- D911B8Z Low Dose Rate (LDR) Brachytherapy of Nose using Iridium 192 (Ir-192)
- D911B9Z Low Dose Rate (LDR) Brachytherapy of Nose using Iodine 125 (I-125)
- D911BB1 Low Dose Rate (LDR) Brachytherapy of Nose using Palladium 103 (Pd-103), Unidirectional Source
- D911BBZ Low Dose Rate (LDR) Brachytherapy of Nose using Palladium 103 (Pd-103)
- D911BCZ Low Dose Rate (LDR) Brachytherapy of Nose using Californium 252 (Cf-252)
- D911BYZ Low Dose Rate (LDR) Brachytherapy of Nose using Other Isotope
- D91397Z High Dose Rate (HDR) Brachytherapy of Hypopharynx using Cesium 137 (Cs-137)
- D91398Z High Dose Rate (HDR) Brachytherapy of Hypopharynx using Iridium 192 (Ir-192)
- D91399Z High Dose Rate (HDR) Brachytherapy of Hypopharynx using Iodine 125 (I-125)
- D9139BZ High Dose Rate (HDR) Brachytherapy of Hypopharynx using Palladium 103 (Pd-103)
- D9139CZ High Dose Rate (HDR) Brachytherapy of Hypopharynx using Californium 252 (Cf-252)
- D9139YZ High Dose Rate (HDR) Brachytherapy of Hypopharynx using Other Isotope
- D913B6Z Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Cesium 131 (Cs-131)
- D913B7Z Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Cesium 137 (Cs-137)
- D913B8Z Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Iridium 192 (Ir-192)
- D913B9Z Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Iodine 125 (I-125)
- D913BB1 Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Palladium 103 (Pd-103), Unidirectional Source
- D913BBZ Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Palladium 103 (Pd-103)
- D913BCZ Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Californium 252 (Cf-252)
- D913BYZ Low Dose Rate (LDR) Brachytherapy of Hypopharynx using Other Isotope
- D91497Z High Dose Rate (HDR) Brachytherapy of Mouth using Cesium 137 (Cs-137)
- D91498Z High Dose Rate (HDR) Brachytherapy of Mouth using Iridium 192 (Ir-192)
- D91499Z High Dose Rate (HDR) Brachytherapy of Mouth using Iodine 125 (I-125)
- D9149BZ High Dose Rate (HDR) Brachytherapy of Mouth using Palladium 103 (Pd-103)
- D9149CZ High Dose Rate (HDR) Brachytherapy of Mouth using Californium 252 (Cf-252)
- D9149YZ High Dose Rate (HDR) Brachytherapy of Mouth using Other Isotope
- D914B6Z Low Dose Rate (LDR) Brachytherapy of Mouth using Cesium 131 (Cs-131)
- D914B7Z Low Dose Rate (LDR) Brachytherapy of Mouth using Cesium 137 (Cs-137)
- D914B8Z Low Dose Rate (LDR) Brachytherapy of Mouth using Iridium 192 (Ir-192)
- D914B9Z Low Dose Rate (LDR) Brachytherapy of Mouth using Iodine 125 (I-125)
- D914BB1 Low Dose Rate (LDR) Brachytherapy of Mouth using Palladium 103 (Pd-103), Unidirectional Source
- D914BBZ Low Dose Rate (LDR) Brachytherapy of Mouth using Palladium 103 (Pd-103)
- D914BCZ Low Dose Rate (LDR) Brachytherapy of Mouth using Californium 252 (Cf-252)
- D914BYZ Low Dose Rate (LDR) Brachytherapy of Mouth using Other Isotope
- D91597Z High Dose Rate (HDR) Brachytherapy of Tongue using Cesium 137 (Cs-137)
- D91598Z High Dose Rate (HDR) Brachytherapy of Tongue using Iridium 192 (Ir-192)
- D91599Z High Dose Rate (HDR) Brachytherapy of Tongue using Iodine 125 (I-125)
- D9159BZ High Dose Rate (HDR) Brachytherapy of Tongue using Palladium 103 (Pd-103)
- D9159CZ High Dose Rate (HDR) Brachytherapy of Tongue using Californium 252 (Cf-252)
- D9159YZ High Dose Rate (HDR) Brachytherapy of Tongue using Other Isotope
- D915B6Z Low Dose Rate (LDR) Brachytherapy of Tongue using Cesium 131 (Cs-131)
- D915B7Z Low Dose Rate (LDR) Brachytherapy of Tongue using Cesium 137 (Cs-137)
- D915B8Z Low Dose Rate (LDR) Brachytherapy of Tongue using Iridium 192 (Ir-192)
- D915B9Z Low Dose Rate (LDR) Brachytherapy of Tongue using Iodine 125 (I-125)
- D915BB1 Low Dose Rate (LDR) Brachytherapy of Tongue using Palladium 103 (Pd-103), Unidirectional Source
- D915BBZ Low Dose Rate (LDR) Brachytherapy of Tongue using Palladium 103 (Pd-103)
- D915BCZ Low Dose Rate (LDR) Brachytherapy of Tongue using Californium 252 (Cf-252)
- D915BYZ Low Dose Rate (LDR) Brachytherapy of Tongue using Other Isotope
- D91697Z High Dose Rate (HDR) Brachytherapy of Salivary Glands using Cesium 137 (Cs-137)
- D91698Z High Dose Rate (HDR) Brachytherapy of Salivary Glands using Iridium 192 (Ir-192)
- D91699Z High Dose Rate (HDR) Brachytherapy of Salivary Glands using Iodine 125 (I-125)
- D9169BZ High Dose Rate (HDR) Brachytherapy of Salivary Glands using Palladium 103 (Pd-103)
- D9169CZ High Dose Rate (HDR) Brachytherapy of Salivary Glands using Californium 252 (Cf-252)
- D9169YZ High Dose Rate (HDR) Brachytherapy of Salivary Glands using Other Isotope
- D916B6Z Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Cesium 131 (Cs-131)
- D916B7Z Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Cesium 137 (Cs-137)
- D916B8Z Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Iridium 192 (Ir-192)
- D916B9Z Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Iodine 125 (I-125)
- D916BB1 Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Palladium 103 (Pd-103), Unidirectional Source
- D916BBZ Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Palladium 103 (Pd-103)
- D916BCZ Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Californium 252 (Cf-252)
- D916BYZ Low Dose Rate (LDR) Brachytherapy of Salivary Glands using Other Isotope
- D91797Z High Dose Rate (HDR) Brachytherapy of Sinuses using Cesium 137 (Cs-137)
- D91798Z High Dose Rate (HDR) Brachytherapy of Sinuses using Iridium 192 (Ir-192)
- D91799Z High Dose Rate (HDR) Brachytherapy of Sinuses using Iodine 125 (I-125)
- D9179BZ High Dose Rate (HDR) Brachytherapy of Sinuses using Palladium 103 (Pd-103)
- D9179CZ High Dose Rate (HDR) Brachytherapy of Sinuses using Californium 252 (Cf-252)
- D9179YZ High Dose Rate (HDR) Brachytherapy of Sinuses using Other Isotope
- D917B6Z Low Dose Rate (LDR) Brachytherapy of Sinuses using Cesium 131 (Cs-131)
- D917B7Z Low Dose Rate (LDR) Brachytherapy of Sinuses using Cesium 137 (Cs-137)
- D917B8Z Low Dose Rate (LDR) Brachytherapy of Sinuses using Iridium 192 (Ir-192)
- D917B9Z Low Dose Rate (LDR) Brachytherapy of Sinuses using Iodine 125 (I-125)
- D917BB1 Low Dose Rate (LDR) Brachytherapy of Sinuses using Palladium 103 (Pd-103), Unidirectional Source
- D917BBZ Low Dose Rate (LDR) Brachytherapy of Sinuses using Palladium 103 (Pd-103)
- D917BCZ Low Dose Rate (LDR) Brachytherapy of Sinuses using Californium 252 (Cf-252)
- D917BYZ Low Dose Rate (LDR) Brachytherapy of Sinuses using Other Isotope
- D91897Z High Dose Rate (HDR) Brachytherapy of Hard Palate using Cesium 137 (Cs-137)
- D91898Z High Dose Rate (HDR) Brachytherapy of Hard Palate using Iridium 192 (Ir-192)
- D91899Z High Dose Rate (HDR) Brachytherapy of Hard Palate using Iodine 125 (I-125)
- D9189BZ High Dose Rate (HDR) Brachytherapy of Hard Palate using Palladium 103 (Pd-103)
- D9189CZ High Dose Rate (HDR) Brachytherapy of Hard Palate using Californium 252 (Cf-252)
- D9189YZ High Dose Rate (HDR) Brachytherapy of Hard Palate using Other Isotope
- D918B6Z Low Dose Rate (LDR) Brachytherapy of Hard Palate using Cesium 131 (Cs-131)
- D918B7Z Low Dose Rate (LDR) Brachytherapy of Hard Palate using Cesium 137 (Cs-137)
- D918B8Z Low Dose Rate (LDR) Brachytherapy of Hard Palate using Iridium 192 (Ir-192)
- D918B9Z Low Dose Rate (LDR) Brachytherapy of Hard Palate using Iodine 125 (I-125)
- D918BB1 Low Dose Rate (LDR) Brachytherapy of Hard Palate using Palladium 103 (Pd-103), Unidirectional Source
- D918BBZ Low Dose Rate (LDR) Brachytherapy of Hard Palate using Palladium 103 (Pd-103)
- D918BCZ Low Dose Rate (LDR) Brachytherapy of Hard Palate using Californium 252 (Cf-252)
- D918BYZ Low Dose Rate (LDR) Brachytherapy of Hard Palate using Other Isotope
- D91997Z High Dose Rate (HDR) Brachytherapy of Soft Palate using Cesium 137 (Cs-137)
- D91998Z High Dose Rate (HDR) Brachytherapy of Soft Palate using Iridium 192 (Ir-192)
- D91999Z High Dose Rate (HDR) Brachytherapy of Soft Palate using Iodine 125 (I-125)
- D9199BZ High Dose Rate (HDR) Brachytherapy of Soft Palate using Palladium 103 (Pd-103)
- D9199CZ High Dose Rate (HDR) Brachytherapy of Soft Palate using Californium 252 (Cf-252)
- D9199YZ High Dose Rate (HDR) Brachytherapy of Soft Palate using Other Isotope
- D919B6Z Low Dose Rate (LDR) Brachytherapy of Soft Palate using Cesium 131 (Cs-131)
- D919B7Z Low Dose Rate (LDR) Brachytherapy of Soft Palate using Cesium 137 (Cs-137)
- D919B8Z Low Dose Rate (LDR) Brachytherapy of Soft Palate using Iridium 192 (Ir-192)
- D919B9Z Low Dose Rate (LDR) Brachytherapy of Soft Palate using Iodine 125 (I-125)
- D919BB1 Low Dose Rate (LDR) Brachytherapy of Soft Palate using Palladium 103 (Pd-103), Unidirectional Source
- D919BBZ Low Dose Rate (LDR) Brachytherapy of Soft Palate using Palladium 103 (Pd-103)
- D919BCZ Low Dose Rate (LDR) Brachytherapy of Soft Palate using Californium 252 (Cf-252)
- D919BYZ Low Dose Rate (LDR) Brachytherapy of Soft Palate using Other Isotope
- D91B97Z High Dose Rate (HDR) Brachytherapy of Larynx using Cesium 137 (Cs-137)
- D91B98Z High Dose Rate (HDR) Brachytherapy of Larynx using Iridium 192 (Ir-192)
- D91B99Z High Dose Rate (HDR) Brachytherapy of Larynx using Iodine 125 (I-125)
- D91B9BZ High Dose Rate (HDR) Brachytherapy of Larynx using Palladium 103 (Pd-103)
- D91B9CZ High Dose Rate (HDR) Brachytherapy of Larynx using Californium 252 (Cf-252)
- D91B9YZ High Dose Rate (HDR) Brachytherapy of Larynx using Other Isotope
- D91BB6Z Low Dose Rate (LDR) Brachytherapy of Larynx using Cesium 131 (Cs-131)
- D91BB7Z Low Dose Rate (LDR) Brachytherapy of Larynx using Cesium 137 (Cs-137)
- D91BB8Z Low Dose Rate (LDR) Brachytherapy of Larynx using Iridium 192 (Ir-192)
- D91BB9Z Low Dose Rate (LDR) Brachytherapy of Larynx using Iodine 125 (I-125)
- D91BBB1 Low Dose Rate (LDR) Brachytherapy of Larynx using Palladium 103 (Pd-103), Unidirectional Source
- D91BBBZ Low Dose Rate (LDR) Brachytherapy of Larynx using Palladium 103 (Pd-103)
- D91BBCZ Low Dose Rate (LDR) Brachytherapy of Larynx using Californium 252 (Cf-252)
- D91BBYZ Low Dose Rate (LDR) Brachytherapy of Larynx using Other Isotope
- D91D97Z High Dose Rate (HDR) Brachytherapy of Nasopharynx using Cesium 137 (Cs-137)
- D91D98Z High Dose Rate (HDR) Brachytherapy of Nasopharynx using Iridium 192 (Ir-192)
- D91D99Z High Dose Rate (HDR) Brachytherapy of Nasopharynx using Iodine 125 (I-125)
- D91D9BZ High Dose Rate (HDR) Brachytherapy of Nasopharynx using Palladium 103 (Pd-103)
- D91D9CZ High Dose Rate (HDR) Brachytherapy of Nasopharynx using Californium 252 (Cf-252)
- D91D9YZ High Dose Rate (HDR) Brachytherapy of Nasopharynx using Other Isotope
- D91DB6Z Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Cesium 131 (Cs-131)
- D91DB7Z Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Cesium 137 (Cs-137)
- D91DB8Z Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Iridium 192 (Ir-192)
- D91DB9Z Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Iodine 125 (I-125)
- D91DBB1 Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Palladium 103 (Pd-103), Unidirectional Source
- D91DBBZ Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Palladium 103 (Pd-103)
- D91DBCZ Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Californium 252 (Cf-252)
- D91DBYZ Low Dose Rate (LDR) Brachytherapy of Nasopharynx using Other Isotope
- D91F97Z High Dose Rate (HDR) Brachytherapy of Oropharynx using Cesium 137 (Cs-137)
- D91F98Z High Dose Rate (HDR) Brachytherapy of Oropharynx using Iridium 192 (Ir-192)
- D91F99Z High Dose Rate (HDR) Brachytherapy of Oropharynx using Iodine 125 (I-125)
- D91F9BZ High Dose Rate (HDR) Brachytherapy of Oropharynx using Palladium 103 (Pd-103)
- D91F9CZ High Dose Rate (HDR) Brachytherapy of Oropharynx using Californium 252 (Cf-252)
- D91F9YZ High Dose Rate (HDR) Brachytherapy of Oropharynx using Other Isotope
- D91FB6Z Low Dose Rate (LDR) Brachytherapy of Oropharynx using Cesium 131 (Cs-131)
- D91FB7Z Low Dose Rate (LDR) Brachytherapy of Oropharynx using Cesium 137 (Cs-137)
- D91FB8Z Low Dose Rate (LDR) Brachytherapy of Oropharynx using Iridium 192 (Ir-192)
- D91FB9Z Low Dose Rate (LDR) Brachytherapy of Oropharynx using Iodine 125 (I-125)
- D91FBB1 Low Dose Rate (LDR) Brachytherapy of Oropharynx using Palladium 103 (Pd-103), Unidirectional Source
- D91FBBZ Low Dose Rate (LDR) Brachytherapy of Oropharynx using Palladium 103 (Pd-103)
- D91FBCZ Low Dose Rate (LDR) Brachytherapy of Oropharynx using Californium 252 (Cf-252)
- D91FBYZ Low Dose Rate (LDR) Brachytherapy of Oropharynx using Other Isotope
About the D91 Code Range
Brachytherapy in ICD-10-PCS refers to the targeted delivery of radiation therapy by placing radioactive sources directly inside or near the affected tissue. It is classified under the Radiation Therapy section and is coded as D91 and related variations.
This root operation specifically treats conditions in the Ear, Nose, Mouth, and Throat areas using different isotopes and dose rates. The provided codes show detailed distinctions based on the anatomical site (e.g., Ear, Nose, Hypopharynx, Mouth, Tongue, Larynx), the isotope used (such as Cesium 137, Iridium 192, Iodine 125, Palladium 103, and others), and whether therapy is delivered at a High Dose Rate (HDR) or Low Dose Rate (LDR). For example, code D91097Z represents HDR brachytherapy of the ear using Cesium 137, while D911B7Z indicates LDR brachytherapy of the nose using Cesium 137. These distinctions allow precise documentation of the brachytherapy procedure, ensuring accuracy in treatment reporting and coding.
Questions About This Page
How many billable codes are in the D91 range?
Of the 169 codes in this range, 168 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the D91 range classify?
The range classifies Brachytherapy procedures, a type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor, performed on the ear, nose, mouth and throat. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
All ICD-10-PCS SectionsAll of Radiation Therapy (D)All of Body System D9ICD-10-PCS Code LookupICD-10-CM Codes ListMS-DRG ReferenceMedicare Code Edits
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
