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25-OH Vitamin D

3035

cpt

normal turn-around time

assays included

specimen type

minimum required

VitD

82306

24 hours

VitD

Serum

1 mL of serum

collection instructions

  • Collect blood in a serum separator tube (SST)

  • Allow the blood to clot at room temperature for 30 minutes if using an SST.

  • Centrifuge and separate serum or plasma from cells within 2 hours of collection.

  • Transport the specimen at 2-8°C if not tested within 2 hours.

collection instructions

  • Hemolysis: Red blood cell destruction can falsely increase glucose levels.

  • Improper Labeling: Specimen must be labeled with at least two patient identifiers.

  • Insufficient Quantity: Volume less than 1 mL may not be sufficient for accurate testing.

  • Lipemia: Excessive fat in the blood can interfere with certain test results.

clinical significance

The Vitamin D (25-hydroxyvitamin D) test measures the level of vitamin D in the blood, which is essential for bone health, immune function, and overall well-being. Vitamin D deficiency is associated with conditions such as osteoporosis, rickets in children, and increased risk of fractures. This test helps diagnose vitamin D deficiency or insufficiency and monitor response to vitamin D supplementation.

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