ARUP's Laboratory Test Directory

Vitamin D, 1, 25-Dihydroxy : 0080385
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Additional Technical Information
  


Mnemonic: VIT D 1,25

Ordering Recommendation: Do not use to diagnose vitamin D insufficiency.
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.

See Compliance Statement B: www.aruplab.com/CS
CPT Code(s): 82652
Cross References: Calcitriol (Vitamin D, 1, 25-Dihydroxy), D, 1-25 Dihydroxy, Vitamin (Vitamin D, 1, 25-Dihydroxy)