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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: GGT/Gamma Glutamyl Transferase

Test Code(s): GGT

CPT Code(s): 82977

Methodology: 5-Amino-2-Nitrobenzoate

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.

Specimen Requirements

Specimen: Blood

Collection Container: Preferred: Green cap with yellow ring (PST)
Also Acceptable: Green top, Red cap with yellow ring (SST), Red top

Collection Volume: Preferred: 1 mL
Pediatrics: 0.4 mL

Sample Analyzed: Plasma or serum

Volume Required: Preferred: 0.5 mL
Pediatrics: 0.2 mL

Specimen Processing: Centrifuge.  If a complete barrier has not formed, transfer cell-free serum/plasma to plastic vial.  Refrigerate.

Specimen Transport: Transport specimen to laboratory. Transport with coolant pack if coming from outreach location.

Stability: Ambient: 24 hours
Refrigerated: 4 days
Frozen: 2 months


Reference Interval:
 Age  U/L
 0-29 days  0-200
 30 days-59 days  0-120
 60 days-3 months  0-100
 4-17 months  0-50
 18 months-15 years  0-30
 16 years and up, Male  0-85
 16 years and up, Female  0-40


Gamma Glutamyl Transferase GT GGTP Transpeptidase

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