Resources

GAMMA GLUTAMYL TRANSFERASE

Test Code
GGT


Alias/See Also
Gamma GT;Gamma-Glutamyl;Gamma-glutamyl Transpeptidase;Gamma-Glutamyltranspeptidase;GGT;GGTP;GT


CPT Codes
82977

Preferred Specimen
1 Gold tube (gel separator)


Minimum Volume
0.5 mL


Other Acceptable Specimens
or 1 Lavender tube (EDTA)


Instructions
Centrifuge for complete separation of serum or plasma and red cells. Separate and refrigerate until tested.


Transport Temperature
Refrigerate


Specimen Stability
  • 2-8°C up to 30 days
  • Frozen up to 1 year


Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed


Methodology

G-glutamyl-carboxy-nitoanilide @ 37°C



Setup Schedule
M, T, W, Th, F, Sa, Sun


Reference Range

9 - 64 IU/L



Performed By
Alverno Laboratories

Performing Laboratory
Alverno Central Lab  
NCHB1 (Chemistry, Beckman AU)


Last Updated: April 25, 2023


The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.