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Vitamin D, 1,25-Dihydroxy, LC/MS/MS
Vitamin D,1,25 (OH)2,Total; Vitamin D3, 1,25 (OH)2; Vitamin D2, 1,25 (OH)2
1 mL serum
Collect blood in a Vacutainer®. Allow blood to clot (30 minutes) at room temperature, 18-25° C. Centrifuge and separate the serum from the cells.
Note: If sample is submitted with less than 1.1 mL and needs to be repeated the sample will be cancelled with the comment "TNP-Initial testing necessitated a repeat, but there was insufficient sample to perform repeat".
Plastic screw-cap vial
Room temperature: 28 days
Refrigerated: 28 days
Frozen: 28 days
Gross hemolysis • lipemia • Icteric specimens • plasma
Liquid Chromatography/Tandem Mass Spectrometry (LC/MS/MS)
This test was developed and its analytical performance characteristics have been determined by Quest Diagnostics. It has not been cleared or approved by the FDA. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.
|Quest Diagnostics Nichols Institute|
|14225 Newbrook Drive|
|Chantilly, VA 20153|
Set up: Mon-Sat evening; Report available: 3 days
|Vitamin D, 1,25 (OH)2, Total|
|1-9 Years||31-87 pg/mL|
|10-13 Years||30-83 pg/mL|
|14-17 Years||19-83 pg/mL|
|Vitamin D3, 1,25 (OH)2||Not available|
|Vitamin D2, 1,25 (OH)2||Not available|
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).
The Result and LOINC information listed below should not be used for electronic interface maintenance with Quest Diagnostics. Please contact the Quest Diagnostics Connectivity Help Desk for more information at 800-697-9302.NOTE: The codes listed in the table below are not orderable Test Codes.
|Result Name||LOINC Code||Component Name|
|86003320||Vitamin D,1,25 (OH)2,Total||62292-8||25-Hydroxyvitamin D2+25-Hydroxyvitamin D3|
|86003321||Vitamin D3, 1,25 (OH)2||1649-3||Calcitriol|
|86003322||Vitamin D2, 1,25 (OH)2||62291-0||1,25-Dihydroxyvitamin D2|
Reference ranges are provided as general guidance only. To interpret test results use the reference range in the laboratory report.
The CPT codes provided are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payer being billed.
LOINC assignment is based on a combination of test attributes, including the method used by the performing laboratory. For tests not performed by Quest Diagnostics, codes are assigned by the performing laboratory.
* The tests listed by specialist are a select group of tests offered. For a complete list of Quest Diagnostics tests, please refer to our Directory of Services.