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Vitamin D, 25-Hydroxy, Total, Immunoassay
Test Code17306
CPT Codes
82306
Preferred Specimen
0.8 mL serum
Patient Preparation
Fasting preferred, but not required
Minimum Volume
0.5 mL
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 7 days
Frozen: 28 days
Refrigerated: 7 days
Frozen: 28 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Moderate hemolysis • Grossly lipemic • Plasma
Methodology
Immunoassay (IA)
Setup Schedule
Set up: Mon-Sat; Report available: 3-4 days
Clinical Significance
Measurement of serum 25-OH vitamin D concentrations provide a good index of circulating vitamin D activity in patients not suffering from renal disease. Lower than normal 25-OH vitamin D levels can result from a dietary deficiency, poor absorption of the vitamin or impaired metabolism of the sterol in the liver. A 25-OH vitamin D deficiency can lead to bone diseases such as rickets and osteomalacia. Above normal levels can lead to hypercalcemia