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Serum/plasma mass concentration of aldosterone

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

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

Quick summary

["Aldosterone helps control how much sodium and potassium your body retains, which can impact your blood pressure and overall fluid levels."]

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

Key facts at a glance

LOINC
33826-9
Short code
LH sp10 p chal SerPl-aCnc
Synonyms
LH sp10 p chal SerPl-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Ref low
1.5
Ref high
9
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
83002
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 check for conditions affecting your adrenal glands, such as hyperaldosteronism (too much aldosterone) or hypoaldosteronism (too little aldosterone). It can also help diagnose or monitor conditions like primary aldosteronism, adrenal tumors, or certain kidney disorders.

What does the test involve?

A blood sample is taken from a vein in your arm. The blood is then sent to a lab where it is analyzed to measure aldosterone levels. This test is typically done after fasting for a few hours, depending on your doctor’s instructions.

What might affect results?

Several factors can influence aldosterone levels, including certain medications (like potassium-sparing diuretics), stress, salt intake, and kidney function. If you’re taking any medications or have recent changes in diet or health, let your doctor know before the test.

What do results mean?

Results are compared to a reference range provided by your lab. High aldosterone levels may suggest conditions like hyperaldosteronism, while low levels could indicate adrenal insufficiency or other issues. Your doctor will discuss the results in the context of your overall health.

Reference range

Follicular: 1.5-9.0 mIU/mLN/A

Specimen: serum

For females: inform if menstrual cycle status. For certain tests, timing within menstrual cycle may matter.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance

Short name

Aldosterone level

Frequently asked questions

How often will I need this test?
The frequency of this test depends on your health condition and treatment plan. If you have a chronic condition like hypertension or adrenal disease, your doctor may schedule follow-up tests regularly to monitor changes in your aldosterone levels.
What are the possible risks or side effects?
The most common side effect of a blood draw is mild discomfort or bruising at the injection site. Rarely, there may be a slight swelling or infection, but these are usually minor and resolve quickly. If you experience excessive bleeding or signs of infection, contact your doctor.
Can I prepare for this test?
Yes, follow your doctor’s instructions carefully. Typically, you may need to fast for several hours before the test. Avoid smoking, caffeine, or strenuous activity for a short time before the procedure. If you have any questions about preparation, ask your healthcare provider.
  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