Specimen Requirements


Vitamin D 1,25 Dihydroxy (Calcitriol)

Specimen Requirement

Collect SST/0.5 mL serum, after 30 minutes of clotting, promptly centrifuge and send.

Alternate Collection:
Collect red top, green top (heparin) or lavender EDTA, centrifuge and transfer 0.5 mL serum/plasma to a screw top plastic vial, indicate sample type on tube and send.


Immunochemiluminometric assay (ICMA)


Room temp: 7 days, Refrigerated: 14 days, Frozen: 14 days

Reference Range

The reference range is determined by the performing laboratory and will show on the report.


2-4 days

Clinical Use

Aid in the diagnosis of primary hyperparathyroidism, hypoparathyroidism, pseudohypoparathyroidism, renal osteodystrophy, vitamin-D resistant rickets.

Test Code