Days Set Up
Varies; test performed twice per week
Analytic Time
MiChart Code
Vitamin D 1,25 Dihydroxy (DHVD)
Soft Order Code

Test Updated:


1,25 Dihydro Cholecalciferol
1,25 Dihydrocholecalciferol
1,25-dihydroxy Vitamin D

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Test Overview

Test Methodology

Diasorin Chemiluminescent Immunoassay

Test Usage

Differential diagnosis of hypercalcemia. Levels are decreased in chronic renal failure and hypoparathyroidism and increased in sarcoidosis.

Reference Range

18 - 78 pg/mL

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements

Collection Instructions

Collect specimen in SST (preferred) or red top tube from a fasting patient (a fasting specimen is recommended, but not required). Centrifuge, aliquot serum into a plastic vial, and refrigerate up to 6 days or freeze for longer storage.

Red Top Tube
Yellow Top Tube
Normal Volume
1.0 mL of serum
Minimum Volume
0.5 mL of serum

Billing Information

CPT Code
Pro Fee Code
Insurance Auth Info

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.