Radiation Therapy (D) ICD-10-PCS
Section D covers radiation therapy procedures with 4,224 ICD-10-PCS codes across 15 body systems, 4,112 of them billable in fiscal year 2026. Each body system below lists its root operations and code ranges.
Body Systems in This Section 15 body systems · 4,224 codes
| Chars 1–2 | Body System | Codes | Billable |
|---|---|---|---|
| D9 | Ear, Nose, Mouth and Throat | 680 | 672 |
| DD | Gastrointestinal System | 416 | 408 |
| DG | Endocrine System | 278 | 270 |
| D0 | Central and Peripheral Nervous System | 240 | 232 |
| DM | Breast | 120 | 112 |
| DB | Respiratory System | 400 | 392 |
| DF | Hepatobiliary System and Pancreas | 240 | 232 |
| DH | Skin | 184 | 180 |
| DV | Male Reproductive System | 122 | 114 |
| DW | Anatomical Regions | 318 | 310 |
| D7 | Lymphatic and Hematologic System | 494 | 486 |
| DP | Musculoskeletal System | 246 | 242 |
| DT | Urinary System | 240 | 232 |
| D8 | Eye | 64 | 56 |
| DU | Female Reproductive System | 182 | 174 |
The info icon previews what each row contains.
About Section D
The seven characters in the radiation oncology section have the following meaning:
- Character 1 = Section
- Character 2 = Body System
- Character 3 = Root Type
- Character 4 = Body Part
- Character 5 = Modality Qualifier
- Character 6 = Isotope
- Character 7 = Qualifier
Radiation oncology procedure codes have a first character value of "D". The second character specifies the body system (e.g., central nervous, musculoskeletal) irradiated. The third character root type specifies the general modality used (e.g., beam radiation) and the fifth character further specifies the radiation modality used (e.g., photons, electrons). The fourth character specifies the body part that is the focus of the radiation therapy. The sixth character specifies the isotopes introduced into the body, if applicable, or whether the beam used is a gamma beam or other photon. The seventh character is not specified in the radiation oncology section, and always has the value None.
Questions About This Page
How many codes are in the D section?
The D section contains 4,224 ICD-10-PCS codes in FY 2026, organized into 15 body systems. 4,112 of them are billable on inpatient claims.
What does section D cover?
Section D covers radiation therapy procedures. The body systems listed above break it into anatomical groups, and each one links to its root operations and code ranges.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
