COVID-19 information for patients and families

To help protect our people, patients and communities, we are screening everyone who enters our main hospital buildings. Some of our entrances may be closed or have reduced access.

Please check our COVID-19 information page for more updates before coming to our sites.

Text size: a a a

Laboratory Medicine

Test catalogue

Gamma-Glutamyl Transferase (GGT)

Test Name

Gamma-Glutamyl Transferase (GGT)

Gold Tube Specimen Type / Requirements

Container Type = Gold (SST)

Minimum Volume = 1ml Serum

Tube must fill to at least ½ or greater of its vacuum capacity

Specimen Handling

Collection Instructions: Collect sample in a gold top (SST) EDTA plasma is also acceptable.

Write your initials, date and time of collection on the collection label.

Stability: Stable at room temperature for 1 week, refrigerated for 1 week and frozen -15 to -20°C for 2 months

Transportation: Transport at room temperature ASAP. Spin if sample time of collection to time sample get to lab exceeds 2hrs

Laboratory Staff Instructions: Separate serum or plasma from cells within 2 hours of collection. .

Sample Rejection Criteria: Grossly hemolyzed samples, Unlabeled or Not Sufficient Quantity samples will be rejected

Required Documentation

Turnaround Time (TAT)

1 hour STAT/Trauma, 2 hours routine

Test Utilization

Reference Value

8 - 78 U/L

Test Code




Testing Location


Other Information

Last Updated: June 06, 2019