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Vitamin D, 25-Hydroxy Total
MessagePerformed on site for WyMCC
For sites not performing in-house, send to Sonora Quest Laboratories
For sites not performing in-house, send to Sonora Quest Laboratories
Test Code
VITD25 (SQL)
Alias/See Also
Calcifediol
VITD25
Performed at Sonora Quest Laboratories, Test code 904059
VITD25
Performed at Sonora Quest Laboratories, Test code 904059
CPT Codes
82306
Preferred Specimen
Serum from SST
Instructions
For sites sending to Sonora Quest Laboratories, see link below for specimen details, methodology, setup schedule and reference ranges.
Transport Temperature
Refrigerated
Clinical Significance
Vitamin D is a fat-soluble steroid hormone precursor that is mainly produced in the skin by exposure to sunlight. Vitamin D is biologically inert and must undergo two successive hydroxylations in the liver and kidney to become the biologically active 1,25‑dihydroxyvitamin D. Vitamin D deficiency is a common cause of secondary hyperparathyroidism. Elevations of parathyroid hormone levels, especially in elderly vitamin D deficient adults can result in osteomalacia, increased bone turnover, reduced bone mass and risk of bone fractures. Low 25‑hydroxyvitamin D concentrations are also associated with lower bone mineral density. In conjunction with other clinical data, the results may be used as an aid in the assessment of bone metabolism.
Additional Information
Vitamin D, 25-Hydroxy, Total
