DM1 Brachytherapy - Breast ICD-10-PCS
The DM1 code range contains 29 ICD-10-PCS codes for Brachytherapy procedures on the breast. 28 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
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.
Codes in the DM1 Range 29 codes · 28 billable
- DM1 Radiation Therapy, Breast, BrachytherapyNon-billable header
- DM1097Z High Dose Rate (HDR) Brachytherapy of Left Breast using Cesium 137 (Cs-137)
- DM1098Z High Dose Rate (HDR) Brachytherapy of Left Breast using Iridium 192 (Ir-192)
- DM1099Z High Dose Rate (HDR) Brachytherapy of Left Breast using Iodine 125 (I-125)
- DM109BZ High Dose Rate (HDR) Brachytherapy of Left Breast using Palladium 103 (Pd-103)
- DM109CZ High Dose Rate (HDR) Brachytherapy of Left Breast using Californium 252 (Cf-252)
- DM109YZ High Dose Rate (HDR) Brachytherapy of Left Breast using Other Isotope
- DM10B6Z Low Dose Rate (LDR) Brachytherapy of Left Breast using Cesium 131 (Cs-131)
- DM10B7Z Low Dose Rate (LDR) Brachytherapy of Left Breast using Cesium 137 (Cs-137)
- DM10B8Z Low Dose Rate (LDR) Brachytherapy of Left Breast using Iridium 192 (Ir-192)
- DM10B9Z Low Dose Rate (LDR) Brachytherapy of Left Breast using Iodine 125 (I-125)
- DM10BB1 Low Dose Rate (LDR) Brachytherapy of Left Breast using Palladium 103 (Pd-103), Unidirectional Source
- DM10BBZ Low Dose Rate (LDR) Brachytherapy of Left Breast using Palladium 103 (Pd-103)
- DM10BCZ Low Dose Rate (LDR) Brachytherapy of Left Breast using Californium 252 (Cf-252)
- DM10BYZ Low Dose Rate (LDR) Brachytherapy of Left Breast using Other Isotope
- DM1197Z High Dose Rate (HDR) Brachytherapy of Right Breast using Cesium 137 (Cs-137)
- DM1198Z High Dose Rate (HDR) Brachytherapy of Right Breast using Iridium 192 (Ir-192)
- DM1199Z High Dose Rate (HDR) Brachytherapy of Right Breast using Iodine 125 (I-125)
- DM119BZ High Dose Rate (HDR) Brachytherapy of Right Breast using Palladium 103 (Pd-103)
- DM119CZ High Dose Rate (HDR) Brachytherapy of Right Breast using Californium 252 (Cf-252)
- DM119YZ High Dose Rate (HDR) Brachytherapy of Right Breast using Other Isotope
- DM11B6Z Low Dose Rate (LDR) Brachytherapy of Right Breast using Cesium 131 (Cs-131)
- DM11B7Z Low Dose Rate (LDR) Brachytherapy of Right Breast using Cesium 137 (Cs-137)
- DM11B8Z Low Dose Rate (LDR) Brachytherapy of Right Breast using Iridium 192 (Ir-192)
- DM11B9Z Low Dose Rate (LDR) Brachytherapy of Right Breast using Iodine 125 (I-125)
- DM11BB1 Low Dose Rate (LDR) Brachytherapy of Right Breast using Palladium 103 (Pd-103), Unidirectional Source
- DM11BBZ Low Dose Rate (LDR) Brachytherapy of Right Breast using Palladium 103 (Pd-103)
- DM11BCZ Low Dose Rate (LDR) Brachytherapy of Right Breast using Californium 252 (Cf-252)
- DM11BYZ Low Dose Rate (LDR) Brachytherapy of Right Breast using Other Isotope
About the DM1 Code Range
The ICD-10-PCS root operation Brachytherapy (DM1) refers to a form of radiation therapy where a radioactive source is placed directly inside or next to the treatment area. This targeted approach is commonly used in the Radiation Therapy classification to treat cancers such as those of the breast.
Brachytherapy codes in ICD-10-PCS specify the body part—in these examples, the left or right breast—along with the dosing type like High Dose Rate (HDR) or Low Dose Rate (LDR), and the particular radioactive isotope used. For instance, DM1097Z describes HDR brachytherapy of the left breast using Cesium 137 (Cs-137), while DM11B9Z indicates LDR brachytherapy of the right breast using Iodine 125 (I-125). These distinctions are essential for accurate coding to reflect the radiation dose and isotope applied during breast cancer treatment.
Questions About This Page
How many billable codes are in the DM1 range?
Of the 29 codes in this range, 28 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 DM1 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 breast. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
