Vitamin D (1,25 Dihydroxy)

Label Mnemonic:	VD125S
Epic code:	LAB536
Downtime form:	Doctor/Provider Orders - Pathology Core and Specialty Care Nursery

Commercial Mailout Laboratory
6240-8 RCP
356-8593

Specimen(s):

Serum

Collection Medium:

Red top tube 5 mL (Clot Activator)

Minimum:

Preferred Minimum: 1 mL serum
Absolute Minimum: 0.5 mL serum

Rejection Criteria:

SST or gels tubes are not appropriate (per Medical Director, Core Pathology).

Delivery Instructions:

Deliver to laboratory immediately after collection.

Turn Around Time:

24 hours upon receipt at reference laboratory (upon receipt in laboratory)

Reference Range:

19.9 - 79.3 pg/mL

Interpretive Data:

Measurement of "Vitamin D (1,25-dihydroxy)" is intended for workup of complex vitamin D issues in the assessment of hypercalcemia, assessment of vitamin D in patients with renal failure, and certain malignancies. This assay is NOT intended for routine assessment of Vitamin D nutritional status (see "Vitamin D, 25-Hydroxy, Plasma").

This test is primarily indicated during patient evaluation for hypercalcemia and renal failure. A normal result does not rule out Vitamin D deficiency. The recommended test for diagnosing Vitamin D deficiency is Vitamin D 25-hydroxy.

Methodology:

Quantitative Chemiluminescent Immunoassay

CPT Code:

82652