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Serum or plasma concentration of aldosterone (mass concentration)

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

This test measures the amount of aldosterone, a hormone produced by your adrenal glands that helps regulate blood pressure and fluid balance.

Quick summary

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

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

Key facts at a glance

LOINC
22594-6
Short code
T palldm IgM Ser-aCnc
Synonyms
T palldm IgM Ser-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
82784
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 This Test Might Be Ordered

Your doctor may recommend this test if you have symptoms like high blood pressure, low blood potassium, or signs of conditions such as primary aldosteroneism (Conn’s syndrome), adrenal tumors, or certain kidney diseases. It may also be used to monitor treatments for these conditions.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid certain medications (like some blood pressure drugs) or foods (like salt) for a short time before testing, depending on your doctor’s instructions.

How the Test Is Performed

A blood sample is drawn from a vein in your arm, typically in a clinic or lab. The blood is then processed to separate serum or plasma for testing.

What the Results Mean

Results are compared to standard reference ranges, but exact values can vary by lab. High aldosterone levels may indicate conditions like hyperaldosteronism, while low levels could suggest adrenal insufficiency or other hormonal imbalances.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Aldosterone level

Frequently asked questions

How long does it take to get my aldosterone test results?
Results are typically available within 1–3 business days, depending on your lab and insurance. Follow-up with your doctor will help clarify any findings.
Can diet affect my aldosterone test results?
Yes, certain foods (like salt) and medications (such as blood pressure drugs) can influence aldosterone levels. Your doctor may ask you to avoid these for a few days before testing to get more accurate results.
What do I do if my aldosterone level is out of range?
If your results are abnormal, your doctor will discuss next steps, which may include further testing, lifestyle changes, or treatment adjustments to manage your condition.
  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