Days Set Up
Tuesday, Thursday
Analytic Time

2 - 7 days

MiChart Code
Aldosterone, 24HR Urine(Sendout)
Soft Order Code

Test Updated:


Aldosterone, 24Hour Urine
ALDUD - ALDU: Collection Duration
ALDUV - ALDU: Urine Volume

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Test Overview

Test Methodology

Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS)

Test Usage

Investigation of primary aldosteronism (e.g., adrenal adenoma/carcinoma and adrenal cortical hyperplasia) and secondary aldosteronism (renovascular disease, salt depletion, potassium loading, cardiac failure with ascites, pregnancy, Bartter's syndrome).

Reference Range

0-30 days: 0.7 - 11.0 mcg/24 hr; 31 days-11 months: 0.7 - 22.0 mcg/24 hr; >or=1 year: 2.0 - 20.0 mcg/24 hr.

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

Specimen Requirements

Collection Offsite

Collect 24 hour urine specimen. Add 25 mL of 50% acetic acid (15 mL for pediatric patients <5 years) as a preservative prior to start of collection. Aliquot 10 mL into a plastic urine container and refrigerate. Record total 24 hour urine volume and collection dates/times on request form.

Normal Volume
10 mL aliquot of 24 hour urine collection
Minimum Volume
1 mL aliquot of 24 hour urine collection

Billing Information

CPT 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.