Vitamin D, 1, 25 DiHydroxy

Source	Blood
Mnemonic	VD125
Specimen Requirements	1 x 5 mL gold top SST tube 1.5 mL serum Minimum Blood Volume for Patients less than 45 kg (100 lb) Including Neonates and Pediatrics
Specimen Handling	PSC: Centrifuge, pour off, and transport on ice to DSC. DSC will freeze sample when it arrives. RRL & Extra-regional: Immediately freeze serum. Ensure frozen specimen is packaged with appropriate packaging material so it remains frozen in transit.
Additional Information
Testing Location	RIA
Testing Frequency	Every 2-3 weeks
Alternate Name(s)	Calcitriol, 1,25 DiHydroxy Vitamin D
Reference Interval	55 - 190 pmol/L

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