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Angiotensin-Converting Enzyme (ACE) in Serum/Plasma

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

This test measures the level of angiotensin-converting enzyme (ACE), an enzyme involved in regulating blood pressure and fluid balance in your body. It may be used to diagnose or monitor conditions affecting your lungs, kidneys, or immune system.

Quick summary

["ACE levels can help identify or track certain lung, kidney, or immune-related conditions."]

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

Key facts at a glance

LOINC
97515-1
Short code
E bangladeshi DNA Spec Ql NAA+probe
Synonyms
E bangladeshi DNA Spec Ql NAA+probe
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe-amp-tar
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 Might This Test Be Ordered?

Your healthcare provider may order this test if you have symptoms like persistent cough, shortness of breath, or unexplained weight loss. It could also be used to check for conditions like sarcoidosis, lymphangioleiomyomatosis (LAM), or certain infections that affect the lungs or kidneys.

What to Expect Before the Test

No special preparation is usually needed. You may have a small needle inserted into a vein in your arm to draw blood. If you’re taking blood pressure medications or have a history of clotting issues, let your provider know beforehand.

What to Expect During the Test

The blood sample will be taken from a vein in your arm. You might feel a slight pinch, but it’s generally quick and painless. The blood is then sent to a lab for analysis.

What the Results Mean

Results can vary widely depending on the condition being tested. Elevated or low ACE levels may suggest specific health concerns, but your provider will interpret the results in the context of your overall health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

ACE levels are important for diagnosing or monitoring conditions like sarcoidosis (a lung/kidney disease), lymphangioleiomyomatosis (a rare lung disease), or certain infections. Abnormal levels may also indicate other systemic conditions affecting the immune system or blood vessels.

Short name

ACE Level

Frequently asked questions

What causes ACE levels to be tested?
ACE testing is often done if you have symptoms like chronic cough, unexplained weight loss, or shortness of breath. It may also be part of a broader evaluation for suspected lung diseases, kidney issues, or immune system disorders.
How long does it take to get results?
Results are typically available within 1 to 3 business days, depending on your lab and healthcare provider’s workflow. Your provider will contact you once they have the results.
Can I eat or drink before the test?
You can eat and drink normally before the test unless your provider has specific instructions. No fasting is required for this blood 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 16, 2026. · Read our editorial policy