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Lead in whole blood (mass concentration)

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

This test measures the amount of lead in your blood, which can indicate exposure to lead over time. Lead is a toxic metal that can affect the nervous system, especially in children.

Quick summary

["Lead exposure can harm your health, especially in kids and pregnant people."]

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

Key facts at a glance

LOINC
18236-0
Short code
Lead Tiss Ql
Synonyms
Lead Tiss Ql
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 This Test Might Be Ordered

Your healthcare provider may order this test if you’ve been exposed to lead, live in an area with high lead levels, or have symptoms like headaches, fatigue, or behavioral changes. Children are tested more often because lead can harm their developing brains.

What to Expect Before the Test

You’ll typically have a small needle inserted into your arm to draw blood. The process takes a few minutes, and you may feel a brief pinch. No special preparation is needed.

What the Results Mean

Higher levels may suggest recent or ongoing exposure to lead. Very high levels can cause serious health problems, but even low levels can be harmful, especially in children. Your provider will discuss the results with you.

Common Causes of Lead Exposure

Lead can come from old paint, contaminated food/water, or dust in homes or workplaces. People who work in industries like construction or battery recycling may also face higher exposure risks.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Blood Lead Level

Frequently asked questions

How often should I get this test?
If you’ve had lead exposure or live in a high-risk area, your provider may recommend regular testing. Children with developmental delays or exposure history may need testing every few years.
What should I do if my lead level is high?
Follow your provider’s advice for reducing exposure (e.g., removing lead paint, improving ventilation) and possible treatments like chelation therapy if needed. Avoid lead-containing products and contact your doctor immediately if you suspect exposure.
Can lead levels change without obvious symptoms?
Yes, lead can build up in your body slowly, even without noticeable symptoms. Regular testing helps track exposure and protect your health, especially in children or people with high-risk jobs/homes.
  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