Nuclear Medicine (C) ICD-10-PCS
Section C covers nuclear medicine procedures with 1,004 ICD-10-PCS codes across 15 body systems, 926 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 · 1,004 codes
| Chars 1–2 | Body System | Codes | Billable |
|---|---|---|---|
| C2 | Heart | 60 | 52 |
| C7 | Lymphatic and Hematologic System | 112 | 104 |
| CB | Respiratory System | 32 | 26 |
| CW | Anatomical Regions | 382 | 372 |
| C0 | Central Nervous System | 48 | 40 |
| CT | Urinary System | 38 | 32 |
| C5 | Veins | 32 | 30 |
| CD | Gastrointestinal System | 26 | 22 |
| CP | Musculoskeletal System | 126 | 120 |
| CH | Skin, Subcutaneous Tissue and Breast | 44 | 40 |
| CG | Endocrine System | 44 | 38 |
| CV | Male Reproductive System | 8 | 6 |
| C8 | Eye | 8 | 6 |
| C9 | Ear, Nose, Mouth and Throat | 8 | 6 |
| CF | Hepatobiliary System and Pancreas | 36 | 32 |
The info icon previews what each row contains.
About Section C
The seven characters in the nuclear medicine section have the following meaning:
- Character 1 = Section
- Character 2 = Body System
- Character 3 = Root Type
- Character 4 = Body Part
- Character 5 = Radionuclide
- Character 6 = Qualifier
- Character 7 = Qualifier
Nuclear medicine section codes represent procedures that introduce radioactive material into the body in order to create an image, to diagnose and treat pathologic conditions, or to assess metabolic functions. The nuclear medicine section does not include the introduction of encapsulated radioactive material for the treatment of cancer. These procedures are included in the radiation oncology section. Nuclear medicine procedure codes have a first character value of "C". The second character specifies the body system on which the nuclear medicine procedure is performed. The third character root type indicates the type of nuclear medicine procedure (e.g., planar imaging or non-imaging uptake).
The fourth character indicates the body part or body region studied. Regional (e.g., lower extremity veins) and combination (e.g., liver and spleen) body part values are used in this section. The fifth character specifies the radionuclide, the radiation source. The fifth character value Other Radionuclide is provided in the nuclear medicine section for newly approved radionuclides until they can be added to the system. The sixth and seventh characters are not specified in the nuclear medicine section, and always have the value None. If more than one radiopharmaceutical is used to perform the procedure, then more than one code is used.
Questions About This Page
How many codes are in the C section?
The C section contains 1,004 ICD-10-PCS codes in FY 2026, organized into 15 body systems. 926 of them are billable on inpatient claims.
What does section C cover?
Section C covers nuclear medicine 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.
