CG4 Nonimaging Nuclear Medicine Uptake - Endocrine System ICD-10-PCS
The CG4 code range contains 6 ICD-10-PCS codes for Nonimaging Nuclear Medicine Uptake procedures on the endocrine system. 5 of the codes are billable and valid for inpatient claim submission in fiscal year 2027.
Root Operation Definition
Nonimaging Nuclear Medicine Uptake: Introduction of radioactive materials into the body for measurements of organ function, from the detection of radioactive emissions.
Codes in the CG4 Range 6 codes · 5 billable
- CG4 Nuclear Medicine, Endocrine System, Nonimaging Nuclear Medicine UptakeNon-billable header
- CG421ZZ Nonimaging Nuclear Medicine Uptake of Thyroid Gland using Technetium 99m (Tc-99m)
- CG42FZZ Nonimaging Nuclear Medicine Uptake of Thyroid Gland using Iodine 123 (I-123)
- CG42GZZ Nonimaging Nuclear Medicine Uptake of Thyroid Gland using Iodine 131 (I-131)
- CG42YZZ Nonimaging Nuclear Medicine Uptake of Thyroid Gland using Other Radionuclide
- CG4YYZZ Nonimaging Nuclear Medicine Uptake of Endocrine System using Other Radionuclide
About the CG4 Code Range
These procedures introduce radioactive material into the body and measure endocrine organ function by detecting its emissions, without producing images.
The fourth character identifies the thyroid gland or the endocrine system. The fifth identifies the radioactive material: technetium 99m, iodine 123, iodine 131, or another radionuclide. The sixth and seventh characters each have None as their only qualifier.
Questions About This Page
How many billable codes are in the CG4 range?
Of the 6 codes in this range, 5 are billable and valid for inpatient claim submission from October 1, 2026 through September 30, 2027. Table header codes group them but cannot be reported on claims.
What does the CG4 range classify?
The range classifies Nonimaging Nuclear Medicine Uptake procedures, introduction of radioactive materials into the body for measurements of organ function, from the detection 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 2027 ICD-10-PCS order file and code tables, effective October 1, 2026 through September 30, 2027.
