Skip to content

Serum or Plasma Aldosterone Concentration (Mass Concentration)

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 affects your blood pressure and fluid levels."]

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

Key facts at a glance

LOINC
25943-2
Short code
LH sp1 p chal SerPl IRP1-aCnc
Synonyms
LH sp1 p chal SerPl IRP1-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
Method
st-irp
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 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 aldosteroneism (Conn’s syndrome) or adrenal gland issues. It may also be used to monitor certain kidney or endocrine disorders.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to avoid certain medications or foods that could affect results, such as salt intake or some blood pressure medications. If you’re taking them, check with your doctor first.

What the Test Involves

A blood sample will be taken from a vein in your arm. This is a simple procedure that usually doesn’t cause discomfort. The sample is sent to a lab for analysis to measure aldosterone levels in your serum or plasma.

What the Results Mean

Results help doctors diagnose conditions affecting your hormone balance or blood pressure. High levels might suggest overactive adrenal glands, while low levels could indicate other hormonal imbalances or adrenal insufficiency.

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

What could cause abnormal results?
Abnormal aldosterone levels can be caused by conditions like primary hyperaldosteronism (excess aldosterone production), adrenal tumors, kidney disease, or certain medications that affect blood pressure or fluid balance.
How often should I get this test?
The frequency depends on your health condition and treatment plan. Your doctor will determine if follow-up tests are needed, such as every few months or annually, based on your symptoms and lab results.
Can diet or medications affect this test?
Yes, certain foods (like high-sodium diets) and medications (such as blood pressure drugs) can influence aldosterone levels. Always inform your doctor about any medications or significant dietary changes before testing.
  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