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HelpTest Code HDL HDL-Cholesterol
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 | 2 days |
| Refrigerate | 7 days |
| Frozen | 3 months |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Alert/Reject |
| Others | Not applicable |
Methodology
Colorimetry
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
<18 years old
| Acceptable | >1.2 mmol/L |
|---|---|
| Borderline low | 1.0 - 1.2 |
| Low | <1.0 mmol/L |
≥ 18 years old
| Low | <1.0 mmol/L |
|---|---|
| Desirable | 1.0 – 1.5 mmol/L |
| Optimal | ≥1.6 mmol/L |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Negative risk factor for Coronary Heart Disease (CHD).
Service Code
31163
Update
Last updated 01/04/2026
Laboratory Code
LAB101
LOINC Code Information
14646-4
Alias
HDL (High Density Lipoprotein), Cholesterol