Days Set Up
Analytic Time

3 - 10 days

MiChart Code
Adrenal Antibodies, 21-Hydroxylase
Soft Order Code

Test Updated:


Adrenal Antibody
Anti-adrenal Antibodies
21-OH Antibody
Adrenal Cortex Antibodies
Hydroxylase Antibodies, 21-
Adrenal Antibodies, 21-Hydroxylase

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Test Overview

Test Methodology

Immunoabsorption Assay

Test Usage

Investigation of adrenal insufficiency and aid in the detection of those at risk of developing autoimmune adrenal failure. Positive results indicate the presence of adrenal autoantibodies consistent with Addison's disease. Research Use Only.

Reference Range

< 1 U/mL

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

Specimen Requirements

Collection Offsite

Collect blood in a red top tube. Centrifuge, aliquot serum into a plastic vial and freeze.

Red Top Tube
Normal Volume
1 mL serum
Minimum Volume
0.2 mL serum

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.