Laboratory Services
Gamma-Glutamyl Transferase (GGT)
Print this pageUpdated Test Information:
| Test Description |
Gamma-Glutamyl Transferase (GGT)
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|---|---|---|
| Synonym(s) |
GGT
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| Test ID |
GGT
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| 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.
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| Specimen Type |
Serum
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| Specimen Requirements |
SST
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| Alternate Specimen Type |
Red, Li-heparin plasma, K2EDTA
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| 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.
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| Minimum Sample Volume |
1 mL
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| Pediatric Min. Volume (if applicable) |
500 uL
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| 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.
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| Stability |
7 days at 15‑25 °C
7 days at 2‑8 °C 1 year at (-15)‑(-25) °C |
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| Methodology |
Colorimetric
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| Estimated TAT |
0-2 days
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| Testing Schedule |
Monday-Saturday
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| CPT Code(s) |
82977
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| Reference Range |
Males: < 60 U/L
Females: < 40 U/L |
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| Performing Lab |
Incyte Diagnostics
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| LOINC Code(s) |
2324-2
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