CG21SZZTomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201)
- Billable / Specific Code
CG21SZZ is a billable ICD-10-PCS procedure code for Tomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Tomographic (Tomo) Nuclear Medicine Imaging involves introduction of radioactive materials into the body for three dimensional display of images developed from the capture of radioactive emissions. In AHRQ's Clinical Classifications Software (CCSR), this procedure falls under Tomographic nuclear medicine imaging.
Code Identity
PCS Table Breakdown
Each ICD-10-PCS code is built from seven characters, each an axis of the procedure. Hover or tap the icons for the official CMS definitions.
| Position | Designation | Value | Meaning |
|---|---|---|---|
| 1 | Section | C | Nuclear Medicine |
| 2 | Body System | G | Endocrine System |
| 3 | Type | 2 | Tomographic (Tomo) Nuclear Medicine Imaging |
| 4 | BodyPart | 1 | Parathyroid Glands |
| 5 | Radionuclide | S | Thallium 201 (Tl-201) |
| 6 | Qualifier | Z | None |
| 7 | Qualifier | Z | None |
In the ICD-10-PCS Alphabetic Index
These FY 2026 ICD-10-PCS Alphabetic Index entries lead to CG21SZZ:
Clinical Classification (CCSR)
AHRQ groups CG21SZZ into these clinical categories.
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for CG21SZZ under the General Equivalence Mappings.
Similar Procedure Codes
Questions About CG21SZZ
Is CG21SZZ a billable code?
Yes. CG21SZZ is a complete seven-character ICD-10-PCS code, specific enough to report Tomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201) on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in CG21SZZ mean?
CG21SZZ breaks down character by character: the 1st character C is the Section (Nuclear Medicine); the 2nd character G is the Body System (Endocrine System); the 3rd character 2 is the Type (Tomographic (Tomo) Nuclear Medicine Imaging); the 4th character 1 is the BodyPart (Parathyroid Glands); the 5th character S is the Radionuclide (Thallium 201 (Tl-201)); the 6th character Z is the Qualifier (None); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of CG21SZZ?
Under the General Equivalence Mappings, Tomographic (Tomo) Nuclear Medicine Imaging of Parathyroid Glands using Thallium 201 (Tl-201) crosswalks to ICD-9-PCS 92.13. The mapping is approximate, so confirm it fits the documentation.
