CG421ZZNonimaging Nuclear Medicine Uptake of Thyroid Gland using Technetium 99m (Tc-99m)
- Billable / Specific Code
CG421ZZ is a billable ICD-10-PCS procedure code for Nonimaging Nuclear Medicine Uptake of Thyroid Gland using Technetium 99m (Tc-99m). It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026). The root operation Nonimaging Nuclear Medicine Uptake involves introduction of radioactive materials into the body for measurements of organ function, from the detection of radioactive emissions.
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 | 4 | Nonimaging Nuclear Medicine Uptake |
| 4 | BodyPart | 2 | Thyroid Gland |
| 5 | Radionuclide | 1 | Technetium 99m (Tc-99m) |
| 6 | Qualifier | Z | None |
| 7 | Qualifier | Z | None |
Convert to ICD-9-PCS
Closest ICD-9-PCS equivalents for CG421ZZ under the General Equivalence Mappings.
Similar Procedure Codes
Questions About CG421ZZ
Is CG421ZZ a billable code?
Yes. CG421ZZ is a complete seven-character ICD-10-PCS code, specific enough to report Nonimaging Nuclear Medicine Uptake of Thyroid Gland using Technetium 99m (Tc-99m) on inpatient claims from October 1, 2025 through September 30, 2026.
What do the characters in CG421ZZ mean?
CG421ZZ 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 4 is the Type (Nonimaging Nuclear Medicine Uptake); the 4th character 2 is the BodyPart (Thyroid Gland); the 5th character 1 is the Radionuclide (Technetium 99m (Tc-99m)); the 6th character Z is the Qualifier (None); the 7th character Z is the Qualifier (None).
What is the ICD-9-PCS equivalent of CG421ZZ?
Under the General Equivalence Mappings, Nonimaging Nuclear Medicine Uptake of Thyroid Gland using Technetium 99m (Tc-99m) crosswalks to ICD-9-PCS 92.01. The mapping is approximate, so confirm it fits the documentation.
