Central and Peripheral Nervous System (D0) ICD-10-PCS
The D0 body system covers Radiation Therapy procedures on central and peripheral nervous system, with 240 ICD-10-PCS codes across 4 root operations, 232 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 · 240 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| D00 | Beam RadiationA type of radiation therapy that uses a machine to aim high-energy rays at the cancer from outside of the body | 66 | 64 |
| D01 | BrachytherapyA type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor | 114 | 112 |
| D02 | 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 | 26 | 24 |
| D0Y | Other Radiation | 34 | 32 |
The info icon shows the official root operation definition and previews the codes in that range.
About the D0 Body System
The ICD-10-PCS root operation for the Central and Peripheral Nervous System in the Radiation Therapy section involves the use of targeted radiation to treat tumors or abnormalities within the nervous system. This operation is documented using specific codes that reflect different radiation techniques.
This classification includes several key methods: Beam Radiation (D00), which refers to high-energy rays directed externally at the tumor; Brachytherapy (D01), where radioactive materials are placed inside or near the tumor using needles, seeds, or catheters; and Stereotactic Radiosurgery (D02), which employs precise, high-dose radiation delivered in a single session using specialized equipment. There is also a code for Other Radiation (D0Y) to capture less common radiation treatments. These codes allow healthcare providers to accurately report the type and approach of radiation therapy used for nervous system conditions, ensuring clear clinical documentation.
Questions About This Page
How many codes are in the D0 body system?
The D0 body system contains 240 ICD-10-PCS codes in FY 2026, organized into 4 root operations. 232 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.
