Gamma Glutamyl Transpeptidase (GGT)
Test Code: 001958
Performing Lab: LabCorp
CPT Code: 82977 001
Synonym
Gamma GT; GGT; GT
Specimen Type
Serum (preferred) OR plasma
Specimen Container
Red-top tube, gel-barrier tube, OR green-top (lithium heparin) tube; do NOT use oxalate, EDTA, or citrate plasma.
Volume
1 mL
Minimum Volume
0.7 mL (NOTE:This volume does NOT allow for repeat testing).
Specimen Handling
Separate serum or plasma from cells within 45 minutes of collection.
Patient Prep
The patient should fast for eight hours prior to collection of the specimen. Since there are false elevations in patients on phenytoin and phenobarbital, such patients would be better served with orders for one of the alternate tests ? leucine aminopeptidase (LAP) or 5? nucleotidase.
Unacceptable Conditions
Gross hemolysis; improper labeling; gross lipemia
Temperature
Maintain specimen at room temperature.
Methodology
Kinetic
Stability
Room Temperature: 14 days
Refrigerated: 14 days
Frozen: 14 days
Refrigerated: 14 days
Frozen: 14 days
| Result Code | Result Name | LOINC |
|---|---|---|
| 001958 | GGT | 2324-2 |
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