Central Nervous System (C0) ICD-10-PCS
The C0 body system covers Nuclear Medicine procedures on central nervous system, with 24 ICD-10-PCS codes across 4 root operations, 20 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 · 24 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| C01 | Planar Nuclear Medicine ImagingIntroduction of radioactive materials into the body for single plane display of images developed from the capture of radioactive emissions | 6 | 5 |
| C02 | Tomographic (Tomo) Nuclear Medicine ImagingIntroduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions | 8 | 7 |
| C03 | Positron Emission Tomographic (PET) ImagingIntroduction of radioactive materials into the body for three dimensional display of images developed from the simultaneous capture, 180 degrees apart, of radioactive emissions | 6 | 5 |
| C05 | Nonimaging Nuclear Medicine ProbeIntroduction of radioactive materials into the body for the study of distribution and fate of certain substances by the detection of radioactive emissions; or, alternatively, measurement of absorption of radioactive emissions from an external source | 4 | 3 |
The info icon shows the official root operation definition and previews the codes in that range.
About the C0 Body System
These nuclear medicine codes cover studies of the brain, cerebrospinal fluid, and central nervous system. The body-part character identifies which of these is studied.
Imaging tables distinguish single-plane images from three-dimensional tomographic images. PET imaging also produces three-dimensional images, capturing radioactive emissions simultaneously from opposite directions. The nonimaging probe detects emissions to study where introduced radioactive materials go, or measures absorption of emissions from an external source.
Questions About This Page
How many codes are in the C0 body system?
The C0 body system contains 24 ICD-10-PCS codes in FY 2027, organized into 4 root operations. 20 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.
