Lymphatic and Hematologic System (D7) ICD-10-PCS
The D7 body system covers Radiation Therapy procedures on lymphatic and hematologic system, with 494 ICD-10-PCS codes across 4 root operations, 486 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 · 494 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| D70 | Beam RadiationA type of radiation therapy that uses a machine to aim high-energy rays at the cancer from outside of the body | 146 | 144 |
| D71 | BrachytherapyA type of radiation therapy in which radioactive material sealed in needles, seeds, wires, or catheters is placed directly into or near a tumor | 254 | 252 |
| D72 | 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 | 56 | 54 |
| D7Y | Other Radiation | 38 | 36 |
The info icon shows the official root operation definition and previews the codes in that range.
About the D7 Body System
The ICD-10-PCS root operation for the Lymphatic and Hematologic System under Radiation Therapy involves applying targeted radiation to treat conditions, typically cancer, within these body systems. This operation uses different radiation delivery methods tailored to the tumor's location and treatment goals.
Examples of this root operation include Beam Radiation (D70), which delivers high-energy rays from an external machine aimed precisely at the cancer, and Brachytherapy (D71), where radioactive materials are placed directly into or near the tumor using needles or seeds. Another method is Stereotactic Radiosurgery (D72), a highly precise external beam technique that administers a single large radiation dose to the tumor using specialized equipment. The code D7Y represents other forms of radiation therapy not specifically categorized. These distinct approaches within the ICD-10-PCS radiation therapy codes allow accurate documentation of treatment strategies targeting the lymphatic and hematologic system.
Questions About This Page
How many codes are in the D7 body system?
The D7 body system contains 494 ICD-10-PCS codes in FY 2026, organized into 4 root operations. 486 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.
