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HelpTest Code Glucose 0, Glucose 60, Glucose 120 Glucose Tolerance Test (3 points)
Additional Codes
| Epic Ordering Code | LAB3053029 |
| NBS code | LBC04399 |
| Service code | 31200 |
Specimen Requirements
Container/Tube: Grey Top
Processing Requirements
Fast patient 10-12 hours before sample collection. Mix specimen well to avoid clotting.
Specimen type: Plasma
Volume: 0.5 mL
Storage/transport requirements: Refrigerated
Specimen Stability
| Specimen Type | Plasma (Stabilized with sodium fluoride/potassium oxalate) |
|---|---|
| Ambient | 2 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Non-diabetic | Gestational Diabetes | Possible pre-existing Diabetes | |
|---|---|---|---|
| Fasting | 3.0 – 5.0 mmol/L | 5.1 – 6.9 mmol/L | => 7.0 mmol/L |
| 60 min | ≤ 9.9 mmol/L | => 10.0 mmol/L | |
| 120 min | ≤ 8.4 mmol/L | 8.5 – 11.0 mmol/L | => 11.1 mmol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
LOINC Code Information
| Glucose 0 min | 14768-6 |
|---|---|
| Glucose 60 min | 25665-1 |
| Glucose 120 min | 25668-5 |
Update
Last updated 07/04/2026