Vitamin D, 1, 25-Dihydroxy
Also known as: VIT D 1,25
Use
This test is primarily indicated during the evaluation of patients with hypercalcemia and renal failure. It is useful as an adjunct to evaluate calcium metabolism in these individuals. A normal result does not rule out Vitamin D deficiency. The recommended test for diagnosing Vitamin D deficiency is Vitamin D 25-hydroxy.
Special Instructions
Serum separator tube or plain red, lithium heparin, or EDTA plasma are acceptable. Centrifuge and separate serum or plasma from cells as soon as possible or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube with a minimum volume of 0.5 mL. Specimens must be refrigerated during transport.
Limitations
This test is not appropriate for diagnosing vitamin D deficiency or insufficiency. A normal result does not definitively rule out Vitamin D deficiency, and the test is not recommended for regular monitoring of vitamin D levels.
FDA ApprovedNew York Approved
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 62290-2
- 62290-2
Result Turnaround Time
0-1 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
Serum separator tube or plain red, lithium heparin or EDTA plasma.
Collection Instructions
Centrifuge and separate serum or plasma from cells as soon as possible or within 2 hours of collection. Transfer to an ARUP Standard Transport Tube.
Storage Instructions
Refrigerated during transport.
Causes for Rejection
Grossly hemolyzed or lipemic specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 week |
| Refrigerated | 2 weeks |
| Frozen | 6 months |