Radiation Therapy (D) ICD-10-PCS
Section D covers radiation therapy procedures with 2,114 ICD-10-PCS codes across 16 body systems, 2,057 of them billable in fiscal year 2027. Each body system below lists its root operations and code ranges.
Body Systems in This Section 16 body systems · 2,114 codes
| Chars 1–2 | Body System | Codes | Billable |
|---|---|---|---|
| D0 | Central and Peripheral Nervous System | 120 | 116 |
| D7 | Lymphatic and Hematologic System | 247 | 243 |
| D8 | Eye | 32 | 28 |
| D9 | Ear, Nose, Mouth and Throat | 340 | 336 |
| DB | Respiratory System | 200 | 196 |
| DD | Gastrointestinal System | 208 | 204 |
| DF | Hepatobiliary System and Pancreas | 120 | 116 |
| DG | Endocrine System | 139 | 135 |
| DH | Skin | 92 | 90 |
| DM | Breast | 60 | 56 |
| DP | Musculoskeletal System | 123 | 121 |
| DT | Urinary System | 120 | 116 |
| DU | Female Reproductive System | 91 | 87 |
| DV | Male Reproductive System | 61 | 57 |
| DW | Anatomical Regions | 159 | 155 |
| D2 | Heart and Great Vessels | 2 | 1 |
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 2,114 ICD-10-PCS codes in FY 2027, organized into 16 body systems. 2,057 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 2027 ICD-10-PCS order file and code tables, effective October 1, 2026 through September 30, 2027.
