Main Content

Vitamin D 25 - Hydroxy (25-OH)

Test Name:Vitamin D 25 - Hydroxy (25-OH)
Epic Order Code:LAB535  
CPT Code:82306
Specimen(s) Type:Serum, 1.0 mL
Acceptable Container(s):Tube tops are gold and red.
Testing Schedule:Batch testing; performed 2-3 times per week according to volume.
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 Client: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 4 days. If longer storage is required, store and transport at -20° C for up to 24 weeks.
Causes for Rejection:Improperly labeled, incorrect container, contaminated, insufficient volume, incorrect/delay in transport, hemolysis.
Reference Range:20 - 100 ng/mL
Additional Information:It is commonly agreed that Vitamin D 25-OH is the metabolite to determine the overall Vitamin D status as it is the major storage form of Vitamin D in the human body. The half life of circulating Vitamin D 25-OH is 2-3 weeks.