Anatomical Regions (DW) ICD-10-PCS
The DW body system covers Radiation Therapy procedures on anatomical regions, with 159 ICD-10-PCS codes across 4 root operations, 155 of them billable in fiscal year 2027. Each root operation defines a distinct procedural objective, and the info icons show the official definition with a preview of the codes inside.
Root Operations in This Body System 4 operations · 159 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| DW0 | Beam RadiationA type of radiation therapy that uses a machine to aim high-energy rays at the cancer from outside of the body | 49 | 48 |
| DW1 | BrachytherapyA type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor | 73 | 72 |
| DW2 | Stereotactic RadiosurgeryA type of external radiation therapy that uses special equipment to position the patient and precisely give a single large dose of radiation to a tumor | 13 | 12 |
| DWY | Other Radiation | 24 | 23 |
The info icon shows the official root operation definition and previews the codes in that range.
About the DW Body System
These codes describe radiation treatment directed at anatomical regions, such as the head and neck, chest, abdomen or whole body. Treatment sites also include the gastrointestinal, respiratory and genitourinary tracts.
The tables distinguish beam radiation, brachytherapy, stereotactic radiosurgery and other radiation. The treatment-site character narrows each code to the region treated.
Questions About This Page
How many codes are in the DW body system?
The DW body system contains 159 ICD-10-PCS codes in FY 2027, organized into 4 root operations. 155 of them are billable on inpatient claims.
What is a root operation?
The root operation is the third character of every ICD-10-PCS code and names the objective of the procedure. Drainage takes fluid out, Excision cuts out a portion of a body part, and Resection removes all of one. Picking the right root operation is the central skill of PCS coding, so each one above carries its official CMS definition.
Related References
Source: CMS FY 2027 ICD-10-PCS order file and code tables, effective October 1, 2026 through September 30, 2027.
