Vitamin D, 25-Hydroxy Total (Vit D 25-OH)
Order Name
VIT D TOTL
Test Number: 2023925
Revision Date 04/04/2019
Test Number: 2023925
Revision Date 04/04/2019
| Test Name | Methodology | LOINC Code |
|---|---|---|
|
Vitamin D, 25-Hydroxy Total (Vit D 25-OH)
|
Chemiluminescence Assay | 49543-2 |
| SPECIMEN REQUIREMENTS | ||||
|---|---|---|---|---|
| Specimen | Specimen Volume (min) | Specimen Type | Specimen Container | Transport Environment |
| Preferred | 1mL (0.3) | Serum | Clot Activator SST | Refrigerated |
| Alternate 1 | 1mL (0.3) | Plasma | Lithium Heparin PST (Light Green Top) | Refrigerated |
| Instructions | EDTA Plasma is not an acceptable specimen type. Stability: Ambient 3 days. Refrigerated 12 days. Frozen 3 months *(Note: If ordering both Vitamin D 25-OH and Vitamin D 1-25DOH then separate serum into two individual aliquots and freeze. See collection instructions for Vitamin D 1-25 Dihydroxy.) |
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| GENERAL INFORMATION | |
|---|---|
| Testing Schedule | Mon-Fri |
| Expected TAT | 2-3 Days |
| Clinical Use | 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. |
| Notes | This assay reports the sum total of 25-OH Vitamin D3 and 25-OH Vitamin D2. |
| CPT Code(s) | 82306 |
| Lab Section | Chemistry |