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Vitamin D, 25-Hydroxy CPT: 82306

Synonyms

25-Hydroxycalciferol

25-OH-D

Cholecalciferol Metabolite

Vitamin D3 Metabolite

Test Includes

Percent of saturation; serum iron; total iron binding capacity; unsaturated iron binding capacity

Expected Turnaround Time

Within 1 day

Specimen Requirements

Specimen

Serum

Volume

0.5 mL

Minimum Volume

0.3 mL (Note: This volume does not allow for repeat testing.)

Container

Red-top tube or gel-barrier tube.

Collection

If tube other than a gel-barrier tube is used, transfer separated serum to a plastic transport tube.

Storage Instructions

Refrigerate

Stability Requirements

Temperature Period
Room Temperature 7 days
Refrigerated 14 days
Frozen 14 days
Freeze/thaw/ cycles Stable x 3

Patient Information

To determine if you have a vitamin D deficiency; if you are receiving vitamin D supplementation, to determine if it is adequate.

When you have an abnormal calcium, phosphorus, and/or parathyroid hormone level; when you have evidence of bone disease or bone weakness; when you are at high risk of deficiency or a healthcare practitioner suspects that you might have a vitamin D deficiency; prior to starting drug treatment for osteoporosis; periodically to monitor treatment of vitamin D deficiency.

A blood sample drawn from a vein in your arm.