Endocrine System (CG) ICD-10-PCS
The CG body system covers Nuclear Medicine procedures on endocrine system, with 22 ICD-10-PCS codes across 3 root operations, 19 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 3 operations · 22 codes
| Chars 1–3 | Root Operation | Codes | Billable |
|---|---|---|---|
| CG1 | Planar Nuclear Medicine ImagingIntroduction of radioactive materials into the body for single plane display of images developed from the capture of radioactive emissions | 11 | 10 |
| CG2 | Tomographic (Tomo) Nuclear Medicine ImagingIntroduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions | 5 | 4 |
| CG4 | Nonimaging Nuclear Medicine UptakeIntroduction of radioactive materials into the body for measurements of organ function, from the detection of radioactive emissions | 6 | 5 |
The info icon shows the official root operation definition and previews the codes in that range.
About the CG Body System
These procedures introduce radioactive materials to image endocrine body parts or measure organ function. The body part can be the parathyroid glands, thyroid gland, both adrenal glands, or endocrine system.
The type distinguishes planar imaging, which shows a single plane, from tomographic imaging, which shows a three-dimensional image. Nonimaging uptake measures organ function by detecting radioactive emissions without producing an image.
Questions About This Page
How many codes are in the CG body system?
The CG body system contains 22 ICD-10-PCS codes in FY 2027, organized into 3 root operations. 19 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.
