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Epic Test Code LAB85 Gamma Glutamyl Transferase

Performing Location(s)



GGT; g-glutamyl transferase

Specimen Type


Preferred Container

Gold or Red top

Minimum Volume to Submit for Testing

0.5 mL Serum or Plasma

  • Multiple test can be performed from this volume. For question please contact the lab at 547-3975

Storage Requirements

Sample tubes should be centrifuged within 2 hour of collection followed by transfer of the serum (red or gold top)  to a labeled plastic, aliquot tube.

See Causes of Rejection for temperature requirements.

Transportation Needs

Deliver specimen to the laboratory within 1 hour of collection. If not possible see “Storage Requirements”

Causes for Rejection

Mislabeled or unlabeled specimen
Less than 50% draw for Vacutainer tubes

Serum > 30 days refrigerated (Serum tubes are routinely stored at the lab for only 7 days therefore, an add-on may not be possible after 7 days.) 
 > 24 hours room temperature
<1 year Frozen
Hemolysis > 350 mg/dL HgB
Lipemia > 1000 mg/dL Trig
Bilirubin > 40 mg/dL Bili

Days of Analysis


Available STAT


Reference Values

Population Units Reference Range
Less than 1 week old U/L 8 - 260
> 1 week old U/L 9-64



Beckman AU/Dx Series

CPT Code


Last Updated