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Vitamin D, 1,25 dihydroxy LC/MS/MS

Lab Section:  Sendout Reference  
Lab Location:  Sendout
Reference Lab: Quest 
Test ID: LAB3825 
Methodology: Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
Schedule: Monday-Saturday
Reported: 7 days
Specimen Requirements:  Collection: 3.0 mL Blood in a Gold Top Tube.
Pediatric volume: 1.0 mL.
Collect blood in a Vacutainer®. Allow blood to clot (30 minutes) at room temperature
Transport: Room temperature.
Unacceptable conditions: Gross hemolysis • lipemia • Icteric specimens • plasma
Stability: Room temperature: 28 days Refrigerated: 28 days Frozen: 28 days


Clinical Indications: This test measures the bioactive form of vitamin D. It is used in the differential diagnosis of hypocalcemia and to monitor patients with renal osteodystrophy or chronic renal failure. This test is not suitable for diagnosis of vitamin D deficiency and monitoring supplementation in most patients. The 25-hydroxyvitamin D test is the recommended test for those purposes (N Engl J Med. 2007;357:266-281).

Reference Interval:  See patient report or consult reference laboratory website.
CPT Code(s): 82652
Last Changed: 12/16/2016 14:14:12
Last Reviewed: 12/27/2016 03:10:14