Test Code 25VITD 25 Hydroxy Vitamin D

Important Note

Interfering Substances: Patients on Biotin therapy will have falsely increased Vitamin D levels.

AKA: Calcifediol

Hospital Ordering Code

Lab535 Vitamin D Hydroxy

Submit only 1 of the following specimens:

Specimen Type: Plasma

Container/Tube: Green top (lithium heparin)

Specimen Volume: 0.5 mL

Additional Information: Label specimen appropriately (plasma).

Specimen Type: Serum

Container/Tube: Serum gel

Specimen Volume: 0.5 mL

Additional Information: Label specimen appropriately (serum).

Unity Point-Sioux City-Chemistry

82306

Electrochemiluminescence

Ambient Stability:

8 days

Refrigerated Stability:

4 days

Frozen Stability:

24 weeks ***Freeze only once***

Daily