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888-LAB-8082 (888-522-8082)

Email Address

info@empirecitylabs.com

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229 49th St Brooklyn NY 11220

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Vitamin D 25-Hydroxy

The Vitamin D, 25-Hydroxy test measures the level of 25-hydroxyvitamin D in the blood, which is the primary form of vitamin D circulating in the bloodstream. Vitamin D is essential for calcium absorption, bone health, and immune function. This test is used to evaluate vitamin D status and diagnose deficiencies or excesses.

Sample type:

Serum

Preparation:

You do not need to do anything special to prepare for the sample collection. Fasting is not required for this test.

Test type:

In person or via trained mobile phlebotomist

Find Patient Service Centers
How it works

Buy a lab test & choose one of the following options to have your sample collected

- Schedule an appointment at one of our convenient Patient Service Centers;
- Take your test kit to a licensed phlebotomist for collection;
- Have your sample collected right at your Health Care Providers location.

Complete sample collection

Complete your sample collection as desired - at a patient service center appointment, with a phlebotomist, or at your healthcare provider's location.

Get fast results online

Access your results online as soon as they are available.
View results

About the Test
  • Vitamin D 25-Hydroxy

The Vitamin D, 25-Hydroxy test measures levels of this crucial vitamin in the blood. Deficiency in vitamin D can lead to bone pain, muscle weakness, and an increased risk of fractures. It may also affect immune function and overall health. Excessive vitamin D levels can cause toxicity, leading to symptoms such as nausea, vomiting, and kidney problems. This test is vital for diagnosing vitamin D deficiencies and managing vitamin D intake.

FAQs
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© 2008-2021 Empire City Laboratories, Inc. All Rights Reserved. ECL and Empire City Laboratories are registered trademarks of Empire City Laboratories®, Inc.

February 2026



Dear valued client,


As we move toward completing the transition of Empire City Laboratories’ clinical laboratory services to Labcorp, we want your practice to experience a smooth and seamless changeover. We appreciate your partnership and want to highlight several important operational reminders as we approach the transition to Labcorp on February 9.
Key Transition Reminders
  1. Last Day to Submit Orders to Empire City Laboratories – February 8
    Empire City Laboratories will continue processing orders through the end of the day on February 8, 2026. Please ensure that all Empire orders arrive at Empire’s facility by this date.
  2. Beginning February 9: Submit Orders to Labcorp
    Starting February 9, 2026, all new laboratory orders should be submitted directly to Labcorp using any of the following methods:
    • EMR interface to Labcorp
    • Labcorp Link
    • A Labcorp paper requisition
  3. Specimen Collection & Pick up
    Effective February 9, please place all specimens in your Labcorp specimen collection box.
    Over the coming weeks, we plan to deliver Labcorp boxes and remove Empire City Laboratories boxes or to relabel them as Labcorp. After a Labcorp box is in place (new or relabeled), placing a specimen in a remaining Empire City Laboratories box may cause delays in specimen processing.
  4. Historical Results
    Beginning February 9, you may continue to utilize the Wellcom portal for a period of time by accessing it directly at new.wellcom.us
If you have any questions during or after the transition, please contact your Labcorp service representative or Labcorp Customer Service at 800 631 5250. When calling, please remember to have your Labcorp account number readily available to help expedite your support.

We  appreciate your attention to these operational updates and your partnership throughout this process. Our shared commitment remains the same: providing accurate, timely, and high quality laboratory services to you and your patients. Thank you for your continued trust.


Sincerely,

Empire City Laboratories & Labcorp