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Serum Aldosterone Concentration (Mass Concentration)

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of aldosterone, a hormone produced by your adrenal glands, in your blood. It helps assess how well your body regulates blood pressure and fluid balance.

Quick summary

["Aldosterone plays a key role in managing blood pressure and electrolyte balance."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
57584-5
Short code
Aldost 3h p 25 mg Cpl PO SerPl-sCnc
Synonyms
Aldost 3h p 25 mg Cpl PO SerPl-sCnc
Category
coagulation
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
80
Ref high
200
Critical range
20 N/A – 400 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
84436
SNOMED
302346007
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 potassium levels, or signs of conditions such as primary aldosteronism (a rare disorder where aldosterone is overproduced). It may also be used to monitor certain kidney or adrenal gland disorders.

What to Expect Before the Test

No special preparation is typically needed. You may be asked to fast for 8–12 hours before the test if your blood is drawn in the morning, but this depends on your doctor’s instructions. Bring any medications you’re currently taking.

How the Test Is Performed

A healthcare provider will draw blood from a vein in your arm using a small needle. You may feel a brief pinch, but the procedure usually takes only a few minutes. The blood sample is then sent to a lab for analysis.

What the Results Mean

Results are compared to standard reference ranges, but your doctor will interpret them in the context of your overall health and symptoms. High aldosterone levels may indicate conditions like hypertension or adrenal tumors, while low levels could suggest other hormonal imbalances.

Reference range

Adult: 80-200 ng/dLN/A

Specimen: serum

Take your thyroid medication after the blood draw if applicable. No fasting required.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Aldosterone Level

Frequently asked questions

What Are Common Causes of Abnormal Results?
High aldosterone levels may be caused by conditions like primary aldosteronism (a hormonal disorder), kidney disease, or certain medications. Low levels could result from adrenal insufficiency, kidney problems, or medications that suppress aldosterone production.
How Often Should This Test Be Repeated?
Your doctor will determine how often to repeat this test based on your diagnosis and symptoms. Follow-up may be needed if you have an ongoing condition affecting aldosterone regulation, such as hypertension or adrenal disease.
Does This Test Interact with Any Medications?
Yes, some medications—such as potassium-sparing diuretics, steroids, or certain blood pressure drugs—can affect aldosterone levels. Always inform your doctor about all medications you’re taking before the test.
  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 17, 2026. · Read our editorial policy