25-Hydroxyvitamin D (25OHD) [Vitamin D]

BC6451

Synonym(s):
Specimen Container
Gel separator tube (Adult)
Microtube (Paeds)
Specimen Requirement

Plain Blood
Adult: 5 mL
Paediatric: 1.3 mL


Invert blood 5 times after blood collection ensures the clot-activating factors is well mixed with the blood. This will ensure results are reliable.

Orderable as Urgent? No
Turn Around Time
1 to 4 days (Refer to date and time performed)
Reference Value(s)
Reference interval for all age groups: 20.0 - 100.0 ng/ml

Vitamin D status is classified according to serum levels of 25-Hydroxyvitamin D as follows:-
Deficiency : <12.0 ng/mL
Insufficiency: 12.0 to <20.0 ng/mL
Sufficiency: 20.0 to 100.0 ng/mL
Potential toxicity: >100.0 ng/mL
Testing Laboratory Location KKH
Laboratory Clinical Chemistry
Contact Number 6394 1383
Day and Time Performed
Tuesday and Friday
Orderable on CPOE? Yes
Downtime Form

Clinical Chemistry - Form A

Additional Information
New reagent formulation (Roche Elecsys Vitamin D total III) on 25th March 2022, no change in reference intervals

Change History Notes

  • 27 May 2024 08:00 AM

    Update of Specimen Requirement.

  • 08 Dec 2021 01:00 PM

    ​Updated Specimen Requirement, Day and Time Performed and Additional Information.

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Last Updated - 19 Jun 2025