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Gamma Glutamyl Transferase (GGT)

Order Name GGT
Test Number: 2002100
Revision Date 09/19/2017
Test Name Methodology LOINC Code
Gamma Glutamyl Transferase (GGT)
Enzymatic 2324-2 
SPECIMEN REQUIREMENTS
Specimen Specimen Volume (min) Specimen Type Specimen Container Transport Environment
Preferred 1 mL (0.5) Plasma Lithium Heparin PST (Light Green Top) Refrigerated
Alternate 1 1 mL (0.5) Serum Clot Activator SST Refrigerated
Instructions Stability: Ambient 8 hours; Refrigerated=1 month; Frozen=1 year
GENERAL INFORMATION
Testing Schedule Daily 
Expected TAT 1-2 days  
Clinical Use Useful for cholestatic liver disease and drug and alcohol abuse. 
CPT Code(s) 82977
Lab Section Chemistry