25-Dihydroxyvitamin D

LOINC codes: 1649-3, 1990-1, 2236-8, 62290-2, 62291-0, 62292-8
Tests that measure 25-Dihydroxyvitamin D: Quest Diagnostics 1

Ranges

Each lab publishes a reference range for the population groups it tests, usually the middle 95% of results. These intervals describe that population, not an optimal or healthy target. How ranges differ

Quest Diagnostics, QuestAssureD™ 25-Hydroxy and Calcitriol 1,25-Dihydroxyvitamin D 16761

Population	Interval
Vitamin D, 25-OH, Total	30-100 ng/mL
Vitamin D, 25-OH, D3	Not established
Vitamin D, 25-OH, D2	Not established
Vitamin D, 1,25 (OH)2, Total	Not stated
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

Quest Diagnostics test catalog, 16761

Tests

Check the catalog code, specimen, method and preparation for every test that measures 25-Dihydroxyvitamin D. Select up to five tests to compare them side by side.

Quest Diagnostics 1 test

Panels that include this biomarker

QuestAssureD™ 25-Hydroxy and Calcitriol 1,25-Dihydroxyvitamin D 16761
3 analytes · Serum · Fasting not stated
Method and collection
Method
Chromatography/Mass Spectrometry
Preparation
Fasting preferred, but not required
Collection
Allow blood to clot (30 minutes) at room temperature. Centrifuge and separate the serum from the cells and transfer serum to a clean transport tube.
Quest Diagnostics catalog page

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Sources

Check the guidelines, studies and lab catalogs behind every range and link on this page. Open a source to see each claim it backs.

Lab catalogs

Quest Diagnostics test menu
Quest Diagnostics
- Test catalog: 1 tests, with codes, specimens, methods and reference intervals
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Codes and registries

LOINC 1649-3, 1990-1, 2236-8, 62290-2, 62291-0, 62292-8
Regenstrief Institute codes that identify the same result across labs.
Search ClinicalTrials.gov for 25-Dihydroxyvitamin D
Registered studies that measure 25-Dihydroxyvitamin D, on the U.S. National Library of Medicine registry.

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

Interpret your own results with a licensed clinician, or track your lab history and health goals in Aumnivida.

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