Vitamin D, 1, 25-dihydroxy Blood Test

This test is used to measure Vitamin D levels in the blood.  The Vitamin D 25-Dihydroxy test measures the active form of Vitamin D which is produced in the liver and kidneys through the conversion of Vitamin D 25-Hydroxy.  This test is not typically used as a routine measurement to assess if a person has a vitamin D deficiency because it may show normal results even if a person has an overall deficiency.  It is more useful when a person is suspected of having a condition which is producing an excess of vitamin D such as Sarcoidosis or certain types of Lymphoma.  This test may also be ordered to aid in the diagnosis or Parathyroid disorder or kidney failure.

For a test which is more commonly used to detect if a person may be suffering from a Vitamin D Deficiency, customers may order the Vitamin D 25-Hydroxy Test.

Turnaround time for the Vitamin D, 1, 25-dihydroxy is typically 2-3 business days.

After placing an order, you will receive a doctor approved lab order by email usually within 20-30 minutes. The emailed Lab Requisition will allow you to go to a local patient collection site to get tested. You will not have to pay any additional lab, collection or doctor's fees.  Most test will normally report within 48-72 hours by secure email. List of collections site can be found using our Lab Locator Tool. If you have any questions please call our offices at 1-844-455-6355 or chat online with a member of our Care Team.