VITAMIN D, 1, 25-DIHYDROXY

Specimen Required
Draw blood in a SST. Centrifuge, separate and send 1.0 mL serum (0.5 mL minimum) refrigerated in screw-capped plastic vial.

Alternate Specimen
Plasma: EDTA, heparin
Serum: Red-top

Rejection Criteria
Hemolysis, gross lipemic

Methodology
Chemiluminescence

Stability
Room Temperature: 24 hours; Refrigerated: 14 days; Frozen: 14 days

Reference Range
20-79 pg/mL
Vitamin D 1, 25 dihydroxy levels should be primarily used to assess Vitamin D status in patients with renal disease and hypercalcemia.
Vitamin D 1, 25 dihydroxy levels are generally less than 5 pg/mL in end stage renal disease patients. The preferred initial test for assessing vitamin D status in the general population in Vitamin D.

Performed
Monday-Friday

Turnaround Time3 days
Test Code125VD
CPT-4 Code (s)
82652
LOINC Codes
1649-3

Warde
Medical
Laboratory