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Lead in blood (mass concentration)

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

This test measures the amount of lead present in your blood, which can indicate exposure to lead and potential health risks.

Quick summary

["Lead exposure may harm your body, especially in children or pregnant people."]

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

Key facts at a glance

LOINC
27232-8
Short code
Lead Mlk-mCnc
Synonyms
Lead Mlk-mCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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 healthcare provider may order this test if you’ve had exposure to lead (e.g., from paint, dust, or certain industries) or if you’re at higher risk, such as living in an older home with peeling paint. It’s also used to monitor children for developmental delays linked to lead exposure.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re a child, your provider may use a special needle to collect blood from your heel.

What the Results Mean

Higher-than-normal levels may suggest recent or ongoing lead exposure. Your provider will discuss results with you and may recommend steps to reduce exposure or further testing.

Common Causes of Lead Exposure

Lead can come from old paint, contaminated dust, leaded gas in older vehicles, or certain hobbies (e.g., soldering). Children are more vulnerable because their bodies absorb lead more easily.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Lead exposure can cause serious health problems, including developmental delays in children, damage to the nervous system, and long-term effects on the heart and kidneys. Chronic exposure may also increase the risk of certain cancers.

Short name

Blood Lead Level

Frequently asked questions

How often should I get this test?
Your provider will determine how often you need this test based on your exposure history, age, and other factors. Children with elevated levels may need follow-up testing more frequently.
What should I do if my test results are high?
If your results are above normal, your provider will work with you to identify sources of exposure and recommend steps to reduce it, such as avoiding certain products or environments. They may also prescribe treatments like chelation therapy in severe cases.
Can lead exposure be prevented?
Yes! Avoiding lead-containing products, cleaning surfaces with lead dust, and using lead-safe practices (like sealing old paint) can help prevent exposure. If you suspect exposure, talk to your 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