ICD-10-PCS Tabular Index · Section D · FY 2026 DW1

DW1 Brachytherapy - Anatomical Regions ICD-10-PCS

The DW1 code range contains 73 ICD-10-PCS codes for Brachytherapy procedures on the anatomical regions. 72 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
73
Procedure Codes
72
Billable Codes
DW1
Characters 1–3
DW
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 DW1 Range 73 codes · 72 billable

73 of 73 shown
  • DW1 Radiation Therapy, Anatomical Regions, BrachytherapyNon-billable header
  • DW10BB1 Low Dose Rate (LDR) Brachytherapy of Cranial Cavity using Palladium 103 (Pd-103), Unidirectional Source
  • DW10BBZ Low Dose Rate (LDR) Brachytherapy of Cranial Cavity using Palladium 103 (Pd-103)
  • DW1197Z High Dose Rate (HDR) Brachytherapy of Head and Neck using Cesium 137 (Cs-137)
  • DW1198Z High Dose Rate (HDR) Brachytherapy of Head and Neck using Iridium 192 (Ir-192)
  • DW1199Z High Dose Rate (HDR) Brachytherapy of Head and Neck using Iodine 125 (I-125)
  • DW119BZ High Dose Rate (HDR) Brachytherapy of Head and Neck using Palladium 103 (Pd-103)
  • DW119CZ High Dose Rate (HDR) Brachytherapy of Head and Neck using Californium 252 (Cf-252)
  • DW119YZ High Dose Rate (HDR) Brachytherapy of Head and Neck using Other Isotope
  • DW11B6Z Low Dose Rate (LDR) Brachytherapy of Head and Neck using Cesium 131 (Cs-131)
  • DW11B7Z Low Dose Rate (LDR) Brachytherapy of Head and Neck using Cesium 137 (Cs-137)
  • DW11B8Z Low Dose Rate (LDR) Brachytherapy of Head and Neck using Iridium 192 (Ir-192)
  • DW11B9Z Low Dose Rate (LDR) Brachytherapy of Head and Neck using Iodine 125 (I-125)
  • DW11BB1 Low Dose Rate (LDR) Brachytherapy of Head and Neck using Palladium 103 (Pd-103), Unidirectional Source
  • DW11BBZ Low Dose Rate (LDR) Brachytherapy of Head and Neck using Palladium 103 (Pd-103)
  • DW11BCZ Low Dose Rate (LDR) Brachytherapy of Head and Neck using Californium 252 (Cf-252)
  • DW11BYZ Low Dose Rate (LDR) Brachytherapy of Head and Neck using Other Isotope
  • DW1297Z High Dose Rate (HDR) Brachytherapy of Chest using Cesium 137 (Cs-137)
  • DW1298Z High Dose Rate (HDR) Brachytherapy of Chest using Iridium 192 (Ir-192)
  • DW1299Z High Dose Rate (HDR) Brachytherapy of Chest using Iodine 125 (I-125)
  • DW129BZ High Dose Rate (HDR) Brachytherapy of Chest using Palladium 103 (Pd-103)
  • DW129CZ High Dose Rate (HDR) Brachytherapy of Chest using Californium 252 (Cf-252)
  • DW129YZ High Dose Rate (HDR) Brachytherapy of Chest using Other Isotope
  • DW12B6Z Low Dose Rate (LDR) Brachytherapy of Chest using Cesium 131 (Cs-131)
  • DW12B7Z Low Dose Rate (LDR) Brachytherapy of Chest using Cesium 137 (Cs-137)
  • DW12B8Z Low Dose Rate (LDR) Brachytherapy of Chest using Iridium 192 (Ir-192)
  • DW12B9Z Low Dose Rate (LDR) Brachytherapy of Chest using Iodine 125 (I-125)
  • DW12BB1 Low Dose Rate (LDR) Brachytherapy of Chest using Palladium 103 (Pd-103), Unidirectional Source
  • DW12BBZ Low Dose Rate (LDR) Brachytherapy of Chest using Palladium 103 (Pd-103)
  • DW12BCZ Low Dose Rate (LDR) Brachytherapy of Chest using Californium 252 (Cf-252)
  • DW12BYZ Low Dose Rate (LDR) Brachytherapy of Chest using Other Isotope
  • DW1397Z High Dose Rate (HDR) Brachytherapy of Abdomen using Cesium 137 (Cs-137)
  • DW1398Z High Dose Rate (HDR) Brachytherapy of Abdomen using Iridium 192 (Ir-192)
  • DW1399Z High Dose Rate (HDR) Brachytherapy of Abdomen using Iodine 125 (I-125)
  • DW139BZ High Dose Rate (HDR) Brachytherapy of Abdomen using Palladium 103 (Pd-103)
  • DW139CZ High Dose Rate (HDR) Brachytherapy of Abdomen using Californium 252 (Cf-252)
  • DW139YZ High Dose Rate (HDR) Brachytherapy of Abdomen using Other Isotope
  • DW13B6Z Low Dose Rate (LDR) Brachytherapy of Abdomen using Cesium 131 (Cs-131)
  • DW13B7Z Low Dose Rate (LDR) Brachytherapy of Abdomen using Cesium 137 (Cs-137)
  • DW13B8Z Low Dose Rate (LDR) Brachytherapy of Abdomen using Iridium 192 (Ir-192)
  • DW13B9Z Low Dose Rate (LDR) Brachytherapy of Abdomen using Iodine 125 (I-125)
  • DW13BB1 Low Dose Rate (LDR) Brachytherapy of Abdomen using Palladium 103 (Pd-103), Unidirectional Source
  • DW13BBZ Low Dose Rate (LDR) Brachytherapy of Abdomen using Palladium 103 (Pd-103)
  • DW13BCZ Low Dose Rate (LDR) Brachytherapy of Abdomen using Californium 252 (Cf-252)
  • DW13BYZ Low Dose Rate (LDR) Brachytherapy of Abdomen using Other Isotope
  • DW1697Z High Dose Rate (HDR) Brachytherapy of Pelvic Region using Cesium 137 (Cs-137)
  • DW1698Z High Dose Rate (HDR) Brachytherapy of Pelvic Region using Iridium 192 (Ir-192)
  • DW1699Z High Dose Rate (HDR) Brachytherapy of Pelvic Region using Iodine 125 (I-125)
  • DW169BZ High Dose Rate (HDR) Brachytherapy of Pelvic Region using Palladium 103 (Pd-103)
  • DW169CZ High Dose Rate (HDR) Brachytherapy of Pelvic Region using Californium 252 (Cf-252)
  • DW169YZ High Dose Rate (HDR) Brachytherapy of Pelvic Region using Other Isotope
  • DW16B6Z Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Cesium 131 (Cs-131)
  • DW16B7Z Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Cesium 137 (Cs-137)
  • DW16B8Z Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Iridium 192 (Ir-192)
  • DW16B9Z Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Iodine 125 (I-125)
  • DW16BB1 Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Palladium 103 (Pd-103), Unidirectional Source
  • DW16BBZ Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Palladium 103 (Pd-103)
  • DW16BCZ Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Californium 252 (Cf-252)
  • DW16BYZ Low Dose Rate (LDR) Brachytherapy of Pelvic Region using Other Isotope
  • DW1KBB1 Low Dose Rate (LDR) Brachytherapy of Upper Back using Palladium 103 (Pd-103), Unidirectional Source
  • DW1KBBZ Low Dose Rate (LDR) Brachytherapy of Upper Back using Palladium 103 (Pd-103)
  • DW1LBB1 Low Dose Rate (LDR) Brachytherapy of Lower Back using Palladium 103 (Pd-103), Unidirectional Source
  • DW1LBBZ Low Dose Rate (LDR) Brachytherapy of Lower Back using Palladium 103 (Pd-103)
  • DW1PBB1 Low Dose Rate (LDR) Brachytherapy of Gastrointestinal Tract using Palladium 103 (Pd-103), Unidirectional Source
  • DW1PBBZ Low Dose Rate (LDR) Brachytherapy of Gastrointestinal Tract using Palladium 103 (Pd-103)
  • DW1QBB1 Low Dose Rate (LDR) Brachytherapy of Respiratory Tract using Palladium 103 (Pd-103), Unidirectional Source
  • DW1QBBZ Low Dose Rate (LDR) Brachytherapy of Respiratory Tract using Palladium 103 (Pd-103)
  • DW1RBB1 Low Dose Rate (LDR) Brachytherapy of Genitourinary Tract using Palladium 103 (Pd-103), Unidirectional Source
  • DW1RBBZ Low Dose Rate (LDR) Brachytherapy of Genitourinary Tract using Palladium 103 (Pd-103)
  • DW1XBB1 Low Dose Rate (LDR) Brachytherapy of Upper Extremity using Palladium 103 (Pd-103), Unidirectional Source
  • DW1XBBZ Low Dose Rate (LDR) Brachytherapy of Upper Extremity using Palladium 103 (Pd-103)
  • DW1YBB1 Low Dose Rate (LDR) Brachytherapy of Lower Extremity using Palladium 103 (Pd-103), Unidirectional Source
  • DW1YBBZ Low Dose Rate (LDR) Brachytherapy of Lower Extremity using Palladium 103 (Pd-103)

About the DW1 Code Range

The ICD-10-PCS root operation Brachytherapy (code DW1) refers to the delivery of radiation therapy by placing a radiation source directly within or very close to a targeted anatomical region. This method is part of the Radiation Therapy section and is used to treat various cancers and other localized conditions.

Brachytherapy codes specify the anatomical region being treated, the dose rate (Low Dose Rate or High Dose Rate), and the radioactive isotope used. For example, codes like DW10BB1 and DW10BBZ represent Low Dose Rate brachytherapy targeting the cranial cavity with Palladium 103 (Pd-103). Similarly, High Dose Rate brachytherapy of the head and neck using isotopes such as Cesium 137 (Cs-137) and Iridium 192 (Ir-192) are coded as DW1197Z and DW1198Z, respectively. These codes allow precise documentation of the radiation source, anatomical site, and treatment method, supporting accurate clinical reporting and billing.

Questions About This Page

How many billable codes are in the DW1 range?

Of the 73 codes in this range, 72 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 DW1 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 anatomical regions. 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 DWICD-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.