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HelpTest Code INS Insulin
Laboratory Code
LAB575
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Fast patient 10 - 12 hours before sample collection. Send sample to laboratory immediately.
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | Not available |
| Refrigerate | Not available |
| Frozen | 7 days |
Methodology
Chemiluminescent Immunoassay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Lipaemia | OK |
| Others | Not applicable |
Reference Interval
2.6 – 24.9 mU/L
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Differential diagnosis of hypoglycaemia (factitious hypoglycaemia, insulin autoimmune hypoglycaemia and insulinoma).
Service Code
31711
LOINC Code Information
20448-7
Alias
Fasting Insulin
Immunoreactive Insulin
Insulin Assay
Native Insulin
Update
Last updated 11/03/2025