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HelpTest Code TVITD 25-Hydroxy Vitamin D Total, Serum
Additional Codes
VITAMIN D
VIT D2 D3
VIT D25
Performing Laboratory
North Ottawa Community Hospital
Specimen Requirements
Specimen Type: Serum
Container/Tube: Red Top or Serum Gel
Specimen Volume: 1 mL
Reference Values
<10 ng/mL Severe deficiency
10-19 ng/mL Mild to moderate deficiency
20-50 ng/mL Optimum levels
51-80 ng/mL Increased risk of hypercalciuria
>80 ng/mL Toxicity possible
Day(s) Test Set Up
Mon-Fri
Methodology
Competitive Immunoassay
Specimen Storage and Stability
| Specimen Type | Temperature | Time |
| Serum | Room Temp | < 4 hours |
| Refrigerated (primary) | <7 days | |
| Frozen | <4 weeks |