Vitamin D, 25 Hydroxy

Source	Blood
Mnemonic	VD
Specimen Requirements	1 x 5 mL gold top SST tube. 1.0 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 samples 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	Weekly
Alternate Name(s)	Vitamin D3, 25-OH Vitamin D
Reference Interval	SEVERE DEFICIENCY < 25 nmol/L MODERATE TO MILD DEFICIENCY 25 - 80 nmol/L OPTIMUM LEVELS 80 - 200 nmol/L TOXICITY POSSIBLE > 250 nmol/L

| Back |