ICD-10-PCS 2027 procedure code
CG21SZZTomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201)
Short description: Tomo Nucl Med Imag of Parathyroid Gland using Thallium 201
Code unchanged since ICD-10-PCS took effect on October 1, 2015. Source: official FY2027 ICD-10-PCS release from CMS. Page updated September 29, 2026. About our data
About CG21SZZ
CG21SZZ is the ICD-10-PCS code for a tomographic (tomo) nuclear medicine imaging procedure on the parathyroid glands using a thallium 201 (tl-201) approach with none (qualifier: none). In ICD-10-PCS, tomographic (tomo) nuclear medicine imaging means introduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions.
In plain terms, this corresponds to parathyroid scan, the ICD-9-CM procedure title it maps to (92.13).
The same procedure with a different approach is coded CG211ZZ (technetium 99m (tc-99m)) and CG21YZZ (other radionuclide).
It doesn't appear in the MS-DRG procedure index, so on its own it doesn't change the DRG assignment.
It has been valid since ICD-10-PCS took effect on October 1, 2015.
What each character means
- 1. Section
- CNuclear Medicine
- 2. Body System
- GEndocrine System
- 3. Type
- 2Tomographic (Tomo) Nuclear Medicine Imaging
Introduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions
- 4. Body Part
- 1Parathyroid Glands
- 5. Radionuclide
- SThallium 201 (Tl-201)
- 6. Qualifier
- ZNone
- 7. Qualifier
- ZNone
Other versions of this procedure
Different radionuclide
ICD-9-CM equivalent
Converter →- 92.13Parathyroid scanapproximate
From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about CG21SZZ
Is CG21SZZ a valid ICD-10-PCS code for 2027?
- Yes. CG21SZZ is valid for inpatient procedures from October 1, 2026 through September 30, 2027.
What is the ICD-9 procedure code for CG21SZZ?
- The CMS GEMs map CG21SZZ to ICD-9-CM 92.13 (Parathyroid scan).