Laboratory Services

Gamma-Glutamyl Transferase (GGT)

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Updated Test Information:

Test Description
Gamma-Glutamyl Transferase (GGT)
Synonym(s)
GGT
Test ID
GGT
General Information
γ‑glutamyltransferase is used in the diagnosis and monitoring of hepatobiliary diseases. γ‑glutamyltransferase is also a sensitive screening test for occult alcoholism.
Specimen Type
Serum
Alternate Specimen Type
Red, Li-heparin plasma, K2EDTA
Specimen Requirements
SST
Specimen Collection / Processing Instructions
SST - Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube or green-top tube is used, transfer separated serum or plasma to a plastic transport tube.
Additional Processing Details
Separate serum or plasma from cells within 45 minutes of collection. If a red-top tube or green-top tube is used, transfer separated serum or plasma to a plastic transport tube.
Stability
7 days at 15‑25 °C
7 days at 2‑8 °C
1 year at (-15)‑(-25) °C
Methodology
Colorimetric
Estimated TAT
0-2 days
Testing Schedule
Monday-Saturday
CPT Code(s)
82977
Minimum Sample Volume
1 mL
Pediatric Min. Volume (if applicable)
500 uL
Reference Range
Males: < 60 U/L
Females: < 40 U/L
Performing Lab
Incyte Diagnostics
LOINC Code(s)
2324-2