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HelpTest Code GLUF Glucose, serum, fasting
Additional Codes
| Epic Ordering Code | LAB81 |
| NBS code | LBC00447 |
| Service code | 31117 |
Specimen Requirements
Submit only one of the following:
| Preferred: | Acceptable: | Acceptable: |
| Grey Top | Yellow Top | Light Green Top |
Additional information: Fast patient 10-12 hours before sample collection.
Processing Requirements
Allow specimen to clot for 30 mins (Yellow Top) and centrifuge within 2 hours
Specimen type: Serum/Plasma
Volume: 0.5mL
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
4.0 – 6.0 mmol/L
Critical value: < 2.5 or > 20.0 mmol/L
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Assessment of Carbohydrate metabolic status.
Diagnosis of Diabetes Mellitus and hypoglycaemia.
Update
Last updated 28/07/2026
LOINC Code Information
14771-0
Alias
GLUFS