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Vitamin D, 25-Hydroxy
MessageVitamin D: when not otherwise specified, order a VD25H. This test code is a Vitamin D level done in CHOMP chemistry.
(The exception is if the doctor specifies a specific Vitamin D, such as 1-25 OH, then order the send-out as requested)
(The exception is if the doctor specifies a specific Vitamin D, such as 1-25 OH, then order the send-out as requested)
Test Code
LAB535
Alias/See Also
VD25H; 25(OH)D3; Calcidiol
CPT Codes
82306
Instructions
Routine venipuncture Collect one 5ml gold top serum separator tube
Specimen Stability
Refrigerated
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Failure to follow collection and storage instructions. Gross Hemolysis, Lipemia or Icterus.
Methodology
Chemiluminescent immunoassay
Setup Schedule
Daily
Report Available
Within 24 hours
Limitations
Ordering Recommendation: Use to diagnose vitamin D insufficiency and monitor response to vitamin D therapy. Testing is recommended only for patients at risk for vitamin D insufficiency.
Reference Range
Vitamin D Status Vitamin D, 25-Hydroxy Deficiency < 10 ng/mL Insufficiency 10-29 ng/mL Sufficiency 30-100 ng/mL Toxicity >100 ng/mL
Clinical Significance
Vitamin D occurs in 2 forms: vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol). Vitamin D3 is obtained from foods of animal origin and from ultraviolet light-stimulated conversion of 7-dehydrocholesterol in the skin, whereas small amounts of vitamin D2 are obtained from foods of plant origin. Both forms of the vitamin are used to fortify various foods and in over-the-counter supplements "
Additional Information
LMRP_Vitamin_D_L36692
