Vitamin D Total (25 -OH)

The 25-hydroxy vitamin D test is the best way to monitor vitamin D levels. The test can determine if your body has a deficiency or excess of vitamin D. It serves as an important indicator of osteoporosis (bone weakness), rickets (bone malformation), and an unusual metabolism of calcium. The test is also referred to as the 25-OH vitamin D test and the calcidiol 25-hydroxycholecalcifoerol test.

Specimen: Serum

Reference Values: 

Sufficiency/Optimal Levels: 30-100 ng/ml 
Insufficiency: 20-29 ng/ml 
Deficiency: <20 ng/ml 
Potential Toxicity: >100 ng/ml 

Method: CLIA  

Loinc: 2236-8