Vitamin D 25 Hydroxy VITD

Synonyms

Allscripts (AEHR) Order Name

Vitamin D, 25-Hydroxy

Sunrise Clinical Manager (SCM) Order Name

Vitamin D, 25-Hydroxy

Clinical Info

Preferred test to diagnose vitamin D insufficiency and monitor response to therapy.

Specimen Type

Blood

Container

Gold Top Tube

Collection Instructions

Container/Tube: Gold-top serum gel tube
Specimen: 0.5 mL (minimum volume: 0.25 mL) of serum
Transport Temperature: Refrigerated
Stability: 8 Hours Room Temperature
4 Days Refrigerated

Transport Instructions

Refrigerated

Specimen Stability

8 Hours Room Temperature
4 Days Refrigerated

Methodology

Electrochemiluminescence Immunoassay (ECLIA)
This assay measures the total of D2(ergocalciferol) and D3(cholecalciferol).

Days Performed

Monday - Sunday, Continuously

Performing Laboratory

Northwell Health Laboratories

CPT

82306

PDM

5901360

Result Interpretation

30.0 - 80.0 ng/mL         Optimum Levels (Reference range)
> 80.0 ng/mL                Toxicity possible
20.0 - 29.0 ng/mL         Insufficiency
10.0 - 19.0 ng/mL         Mild to Moderate Deficiency
< 10.0 ng/mL                Severe Deficiency
 
Optimum levels for 25-Hydroxy Vitamin D are 30.0 ng/mL and above based on the Endocrine Society guidelines 2011. However, there is a lack of consensus on this and the Institute of Medicine recommends 20.0 ng/mL and above as optimum levels. Vitamin D results may vary depending on the method of analysis. The current  Roche Cobas e801 Electrochemiluminescent method measures both D2 and D3.
 
 

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