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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