Vitamin D, 1, 25-Dihydroxy : ARUP Lab Tests

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Vitamin D, 1, 25-Dihydroxy : 0080385

Mnemonic: VIT D 1,25

Methodology:	Quantitative Radioimmunoassay
Performed:	Sun-Sat
Reported:	2-4 days
Specimen Required:	Collect: Serum separator tube or plain red. Also acceptable: Lavender (EDTA) or pink (K₂EDTA). Specimen Preparation: Allow serum separator or plain red tube to sit for 15-20 minutes at room temperature for proper clot formation. Centrifuge and separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 2 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 1 mL) Storage/Transport Temperature: Refrigerated. Stability (collection to initiation of testing): After separation from cells: Ambient: 72 hours; Refrigerated: 1 week; Frozen: 6 months

Reference Interval: 15-75 pg/mL
Interpretive Data:	This test is primarily indicated during patient evaluation for hypercalcemia and renal failure. A normal result does not rule out Vitamin D deficiency. The recommended test for diagnosing Vitamin D deficiency is Vitamin D 25-hydroxy. Refer to Statement B under Testing Information at http://www.aruplab.com.
CPT Code(s):	82652
Cross References:	Calcitriol (Vitamin D, 1, 25-Dihydroxy), D, 1-25 Dihydroxy, Vitamin (Vitamin D, 1, 25-Dihydroxy)

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