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HelpTest Code GGT Gamma Glutamyl Transferase
Laboratory Code
LAB85
Specimen Requirements
Submit only one of the following:
Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5 mL
Minimum Volume: 0.5 mL plasma
Collection Instructions: Centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum/Plasma |
|---|---|
| Ambient | 7 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Reference Interval
| Age | Male (U/L) | Female (U/L) |
|---|---|---|
| 0 – < 15 days | 23 – 219 | |
| 15 days – < 1 yr | 8 – 127 | |
| 1 yr – < 11 yrs | 6 – 16 | |
| 11 yrs – < 19 yrs | 7 – 21 | |
| ≥ 19 yrs | < 55 | < 38 |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Assessment of liver profile.
Service Code
31019
LOINC Code Information
2324-2
Alias
Gamma Glutamyltransferase (GGT)
Gamma-Glutamyltranspeptidase (GGTP)
Update
Last updated 11/03/2025