CG2 Tomographic (Tomo) Nuclear Medicine Imaging - Endocrine System ICD-10-PCS
The CG2 code range contains 5 ICD-10-PCS codes for Tomographic (Tomo) Nuclear Medicine Imaging procedures on the endocrine system. 4 of the codes are billable and valid for inpatient claim submission in fiscal year 2026.
Root Operation Definition
Tomographic (Tomo) Nuclear Medicine Imaging: Introduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions.
Codes in the CG2 Range 5 codes · 4 billable
- CG2 Nuclear Medicine, Endocrine System, Tomographic (Tomo) Nuclear Medicine ImagingNon-billable header
- CG211ZZ Tomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Technetium 99m (Tc-99m)
- CG21SZZ Tomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201)
- CG21YZZ Tomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Other Radionuclide
- CG2YYZZ Tomographic (Tomo) Nuclear Medicine Imaging of Endocrine System using Other Radionuclide
About the CG2 Code Range
The ICD-10-PCS root operation Tomographic (Tomo) Nuclear Medicine Imaging (CG2) involves creating sectional images of a body system using radioactive substances. This technique belongs specifically to the Nuclear Medicine classification and is used for detailed diagnostic visualization.
Within this classification, Tomographic Nuclear Medicine Imaging is applied to the Endocrine System, especially for assessing glands like the Parathyroid Glands. The provided codes specify imaging performed with various radionuclides, such as Technetium 99m (Tc-99m) (CG211ZZ), Thallium 201 (Tl-201) (CG21SZZ), or other radionuclides (CG21YZZ, CG2YYZZ). These codes capture the precise imaging modality and radiopharmaceutical used, offering accurate documentation essential for diagnostic and treatment planning in endocrine conditions. Utilizing these codes ensures clear communication of the procedure's technical and clinical details within nuclear medicine.
Questions About This Page
How many billable codes are in the CG2 range?
Of the 5 codes in this range, 4 are billable and valid for inpatient claim submission from October 1, 2025 through September 30, 2026. Table header codes group them but cannot be reported on claims.
What does the CG2 range classify?
The range classifies Tomographic (Tomo) Nuclear Medicine Imaging procedures, introduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions, performed on the endocrine system. Each code adds the body part, approach, device, and qualifier in characters four through seven, and links to its own reference page.
Related References
Source: CMS FY 2026 ICD-10-PCS order file and code tables, effective October 1, 2025 through September 30, 2026.
