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General Information:

Web Links:

Mayo Clinic Laboratories

Test Code LAB0213462 Gamma-Glutamyltransferase (GGT), Plasma

Methodology

L-Gamma-Glutamyl-3-Carboxy-4-Nitroanilide Substrate

Useful for the detection of cholestatic liver disease and drug and alcohol abuse.

Performing Laboratory

CentraCare Laboratory Services

Specimen Requirements

Specimen Type: Plasma

Container/Tube:

Preferred: Green top (Lithium heparin/PST)

Acceptable: Serum(Red top, Gold/SST), Na Heparin  plasma (label specimen appropriately)

Specimen Volume: 0.5 mL

Minimum: 0.25 ml

Specimen Transport Temperature

Refrigerated

Reference Values

0-30 days: 24-171 U/L

1-4 months: 16-147 U/L

4-6 months: 5-93 U/L

>6 months: 8-38 U/L

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

82977