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Serum or plasma concentration of aldosterone measured by immunoassay

Published: August 9, 2026Updated: August 16, 2026

This test measures the level of aldosterone, a hormone that helps regulate blood pressure and fluid balance in your body.

Quick summary

["Aldosterone helps control how much sodium and water your body retains, which can affect your blood pressure and heart health."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
10107-1
Short code
ST wave ED L-AVL
Synonyms
ST wave ED L-AVL
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ekg
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Is This Test Done?

Your doctor may order this test to diagnose or monitor conditions like high blood pressure (hypertension), adrenal gland disorders (such as primary aldosteroneism), or to check for conditions affecting hormone balance, like Addison’s disease.

What Does the Test Involve?

A blood sample is taken from a vein, usually in your arm. The sample is sent to a lab where it is analyzed to measure aldosterone levels using an immunoassay method.

What Are Common Results?

Results are typically reported as a concentration value (in units like pg/mL or nmol/L), but exact reference ranges can vary by lab. High or low levels may indicate specific health concerns.

What Are Possible Causes of Abnormal Results?

High aldosterone levels may be linked to conditions like primary aldosteronism, kidney disease, or certain medications. Low levels could suggest adrenal insufficiency, pregnancy, or other hormonal imbalances.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Aldosterone (serum/plasma)

Frequently asked questions

What does an elevated aldosterone level mean?
An elevated aldosterone level may indicate conditions like primary aldosteroneism (Conn’s syndrome), kidney disease, or certain medications that affect hormone function. Your doctor will review your symptoms and other test results to determine the cause and next steps.
What does a low aldosterone level mean?
Low aldosterone levels may suggest adrenal insufficiency, pregnancy, or conditions affecting hormone production. This could also be related to medications or other health issues. Your doctor will discuss further testing or treatment options based on your overall health.
How often should I get this test?
The frequency depends on your health condition and treatment plan. Your doctor will determine how often to repeat this test based on your symptoms, medical history, and other test results.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy