Tests

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Vitamin D 1, 25 - Dihydroxy

Test Name:Vitamin D 1, 25 - Dihydroxy
Epic Order Code:LAB536  
CPT Code:82652
Specimen(s) Type:Serum, 1.0 mL
Acceptable Container(s):Tube tops are gold and red.
Testing Schedule:Monday-Friday
Turn Around Time:STAT: NA
 Routine: 48-72 hours
Collection Information:No special patient preparation is required. Obtain by standard collection procedures.
Transport Information:Deliver to lab immediately. All specimens must be signed into the laboratory.
Reference Clients:If unable to deliver to the lab within 1 hour, centrifuge the specimen and remove serum from the red cells. Store and transport at 2-8° C within 7 days. If longer storage is required, store and transport at -20° C for up to 6 months.
Causes for Rejection:Improperly labeled, incorrect container, contaminated, insufficient volume, incorrect/delay in transport, hemolysis.
Reference Range:Males:
 <16 years: 24-86 pg/mL
 > 16 years: 18-64 pg/mL
 Females:
 <16 years: 24-86 pg/mL
 > 16 years: 18-78 pg/mL
Additional Information: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.