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gamma-Glutamyl Transferase (GGT)

Tube Type = Mint Green Plasma Separator

Tube Type

Test ID LAB85
EPIC Order GAMMA GT (GGT)
CPT Code(s) 82977
Group/Individual Test Individual
Laboratory Core Laboratory
Tube Station Routine 30; STAT 888
Specimen Routine: 1 mL blood/green lithium heparin-Gel tube. Gold SST tube or red plain tube also acceptable
Micro: 200 µL blood/mint green top bullet/gold top/red top
Stability Unspun: ≤6 hours
Spun/Separated,
Room Temp:		 ≤7 days
Spun/Separated,
Refrigerated:		 ≤7 days
Spun/Separated,
Frozen		 ≤6 months
Availability 24 hrs/day
Turnaround Time STAT 1 hr., Routine 2 hrs.
Reference Range Normal: Male <73 U/L
Female <38 U/L
Comment Reference Ranges effective 7/13/2021

Reviewed by J. Carr on December 31, 2025

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514