Isoforms 25-Hydroxy Vitamin D

Test Code: TD_5853
CPT Code(s): 82306

$69

Test Details

Alternative Name(s)

N/A

Test Includes

Isoforms 25-Hydroxy Vitamin D

Methodology

Liquid chromatography-tandem mass spectrometry (LC-MS/MS)

Rejection Criteria

Gross hemolysis
Icterus

Reference Range(s)

By report

Specimen Requirements

Preferred Specimen

Serum separator tube

Minimum Volume

0.25 mL serum or plasma

Sample Stability

22 days room temperature
22 days refrigerated
27 days frozen

Transport Temperature

Refrigerated

Collection Instructions

Allow SST to clot in an upright position for at least 30 minutes, then centrifuge sample within 2 hours of collection. Refrigerate.

Alternative Specimen

1 mL serum from a plain red top tube. Allow sample to clot in an upright position for at least 60 minutes, then centrifuge sample and transfer serum to a plastic transport tube within 2 hours of collection. Clearly label tube as serum from a plain red top tube. Refrigerate.
1 mL EDTA (lavender top) or heparin (green top) plasma. Centrifuge sample and separate plasma from cells within 2 hours of collection. Transfer plasma to a plastic transport tube. Clearly label tube as EDTA or heparin plasma. Refrigerate.