Gastrointestinal System (DD) ICD-10-PCS
The DD body system covers Radiation Therapy procedures on gastrointestinal system, with 416 ICD-10-PCS codes across 4 root operations, 408 of them billable in fiscal year 2026. 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 · 416 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| DD0 | Beam RadiationA type of radiation therapy that uses a machine to aim high-energy rays at the cancer from outside of the body | 114 | 112 |
| DD1 | BrachytherapyA type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor | 198 | 196 |
| DD2 | 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 | 44 | 42 |
| DDY | Other Radiation | 60 | 58 |
The info icon shows the official root operation definition and previews the codes in that range.
About the DD Body System
The ICD-10-PCS root operation DD in the Gastrointestinal System category refers to various forms of Radiation Therapy, which use targeted radiation to treat diseases, commonly cancer, in the digestive tract. This operation involves applying controlled doses of radiation to specific areas without surgical removal.
This root operation includes multiple techniques: Beam Radiation (code DD0) delivers high-energy rays externally aimed at the tumor; Brachytherapy (code DD1) places radioactive sources directly into or near the tumor via implanted needles or seeds; and Stereotactic Radiosurgery (code DD2) is a precise external method that administers a large single dose using specialized equipment to target the tumor. There is also a generic category for Other Radiation (code DDY) covering less common techniques. Understanding these ICD-10-PCS gastrointestinal radiation therapy codes is essential for accurately documenting the specific therapy type administered for patient care and billing purposes.
Questions About This Page
How many codes are in the DD body system?
The DD body system contains 416 ICD-10-PCS codes in FY 2026, organized into 4 root operations. 408 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 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
