Days Set Up
Monday - Saturday
Analytic Time

3 - 4 days

MiChart Code
Soft Order Code

Test Updated:


Antidiuretic Hormone
Arginine Vasopressin

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All specimens should be accompanied by a requisition.

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Test Overview

Test Methodology

Immunofluorescent Assay

Test Usage

The investigation of the differential diagnosis of patients with water balance disorders, including diabetes insipidus in conjunction with osmolality and hydration status

Reference Range

Non-water deprived, non-fasting adults: <13.1 pmol/L
Water deprived, fasting adults: <15.2 pmol/L
Non-water deprived, non-fasting pediatric patients: <14.5 pmol/L

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

Specimen Requirements

Collection Offsite

Instruct patient to fast and thirst for 8 hours prior to specimen collection (no food or liquids, including water). Collect specimen in a lavender top tube. Centrifuge and aliquot plasma into a screw capped, plastic tube. Freeze.

Lavender Top Tube
Normal Volume
0.5 mL EDTA plasma
Minimum Volume
0.3 mL EDTA plasma

Billing Information

CPT Code
Pro Fee Code

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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.