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QuestAssureD 25-Hydroxy and 1,25-Dihydroxyvitamin D, LC/MS/MS Blood Test

Total reviews 261

$187.50 $125.00

Total reviews 261


  • Tests Included: 8

  • Est. 5-7 days Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

Vitamin D originating from dietary and endogenous sources is converted to 25-hydroxyvitamin D in the liver, and subsequently to 1, 25-dihydroxyvitamin D in the kidney. Measurement of both the 1, 25-Dihydroxy and 25-Hydroxy forms provide insights into a variety of medical conditions such Vitamin D status in renal failure, differential diagnosis of primary, secondary and tertiary hyperparathyroidism. Differential diagnosis of hypercalcemia and type I and II inherited rickets.

$187.50 $125.00
  • Tests Included: 8

  • Est. 5-7 days Turnaround

  • Specimen type: Blood

  • Quest Diagnostics Location

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QuestAssureD™ 25-Hydroxyvitamin D (D2, D3) and Vitamin D, 1,25-Dihydroxy

  • Test Code: 16761
  • CPT Code: 82306, 82652
  • Alternate Name: QuestAssureD 25-Hydroxy and 1,25-Dihydroxyvitamin D, LC/MS/MS Blood Test
  • Test Instructions : Fasting preferred, but not required

    Please do not exercise prior to testing. It is best that your blood is taken in a rested state.

  • Fasting: Yes
  • Methodology: Chromatography/Mass Spectrometry
  • Results In: 5-7

    Note: Turn around times on results are an estimate and are not guaranteed. The lab may need additional time due to holidays, confirmation/repeat testing, etc. You can contact us to discuss when your results should be ready and we will contact the lab on your behalf immediately.

QuestAssureD™ 25-Hydroxyvitamin D (D2, D3)

Vitamin D, 25-OH, Total 30-100 ng/mL

25-OHD3 indicates both endogenous production and supplementation. 25-OHD2 is an indicator of exogenous sources, such as diet or supplementation. Therapy is based on measurement of Total 25-OHD, with levels <20 ng/mL indicative of Vitamin D deficiency, while levels between 20 ng/mL and 30 ng/mL suggest insufficiency. Optimal levels are ≥30 ng/mL.

Vitamin D, 25-OH, D3 Not established
Vitamin D, 25-OH, D2 Not established

 

Vitamin D, 1,25-Dihydroxy

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
   Adult 18-72 pg/mL
Vitamin D3, 1,25 (OH)2 Not available
Vitamin D2, 1,25 (OH)2 Not available
$187.50 $125.00

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