Gamma GTP

Test Code

GAMMA-GTP

Alias/See Also

GGTP
Chemistry

Preferred Specimen

Light Green Top Tube -Plasma

Minimum Volume

2 mL

Other Acceptable Specimens

Gold Top Tube

Transport Temperature

Refrigerate

Specimen Stability

Room temperature: 7 days
Refrigerated (2-8°C): 7 days
Frozen (-20°C): > 1 year

Methodology
Enzymatic

Setup Schedule

Daily at West Roxbury
M- F at Bedford

Report Available

TAT 1 - 3 days

Reference Range

10.0-65.0 IUNITS/L

Clinical Significance

Elevated GGT is found in all forms of liver disease. Measurement of GGT is used in the diagnosis and treatment of alcoholic cirrhosis, as well as primary and secondary liver tumors. It is more sensitive than alkaline phosphatase, the transaminases, and leucine aminopeptidase in detecting obstructive jaundice, cholangitis, and cholecystitis. Normal levels of GGT are seen in skeletal diseases; thus, GGT in serum can be used to ascertain whether a disease, suggested by elevated alkaline phosphatase, is skeletal or hepatobiliary.

Performing Laboratory
Test performed in these BACL Chemistry Labs
Contact: Jonathan Dryjowicz-Burek, West Roxbury 857-203-5973
Alternate contact Bhumikaben Patel Bedford 781-687-2976

Last Updated: August 6, 2021

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.