Lymphatic and Hematologic System (D7) ICD-10-PCS
The D7 body system covers Radiation Therapy procedures on lymphatic and hematologic system, with 247 ICD-10-PCS codes across 4 root operations, 243 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 · 247 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 | 73 | 72 |
| 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 | 127 | 126 |
| 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 | 28 | 27 |
| D7Y | Other Radiation | 19 | 18 |
The info icon shows the official root operation definition and previews the codes in that range.
About the D7 Body System
These codes cover radiation treatment of the bone marrow, thymus, spleen, and lymphatic areas in the neck, armpit, chest, abdomen, pelvis, and groin.
The tables separate beam radiation, brachytherapy, stereotactic radiosurgery, and other radiation. The treatment-site character identifies the part or lymphatic area treated.
Questions About This Page
How many codes are in the D7 body system?
The D7 body system contains 247 ICD-10-PCS codes in FY 2027, organized into 4 root operations. 243 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.
