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Lead (Blood) Concentration

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

This test measures the amount of lead present in your blood. Lead is a heavy metal that can harm your body, especially in children.

Quick summary

["Lead exposure can cause serious health problems, especially in kids."]

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

Key facts at a glance

LOINC
91025-7
Short code
LEADDEPARTMENTORAGENCYNAME
Synonyms
—
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 have symptoms of lead poisoning, such as abdominal pain, fatigue, or behavioral changes in children. It’s also used to monitor lead exposure in people working with lead or living in areas with high lead levels. Some children are screened as part of routine check-ups, especially if they live in homes built before 1978, when lead-based paint was common.

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, the process is usually quick and painless, and you may be given a small reward afterward.

What to Expect During the Test

The blood sample is taken from a vein in your arm. You might feel a slight pinch, but it usually doesn’t cause discomfort. The sample is then sent to a lab for testing.

What the Results Mean

Results are compared to guidelines set by health organizations. High levels of lead in blood can indicate exposure that requires medical attention. Your healthcare provider will discuss the results with you and recommend next steps if needed.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Lead in the body can cause long-term damage to the nervous system, especially in children, leading to developmental delays, learning difficulties, or behavioral issues. In adults, it may affect the heart, kidneys, and reproductive health. Chronic exposure can also increase the risk of certain cancers.

Short name

Blood Lead Level

Frequently asked questions

How often should I get this test?
The frequency depends on your risk factors. Children with known lead exposure or living in high-risk areas may need testing every 6 to 12 months. Adults with occupational exposure or other risk factors may also be tested regularly. Your healthcare provider will determine the best schedule for you.
What are the typical symptoms of lead poisoning?
Symptoms vary by age and level of exposure. In children, early signs may include irritability, poor appetite, weight loss, or trouble sleeping. More severe poisoning can cause vomiting, seizures, or developmental problems. In adults, symptoms may include fatigue, headaches, memory issues, or abdominal pain. If you notice these symptoms, especially in a child, talk to your doctor.
Can lead exposure be prevented?
Yes! Avoiding lead exposure is key. If you live in an older home, ensure proper maintenance to prevent lead dust. Avoid lead-containing products like old paint or toys. If you work in a job with lead exposure, follow safety guidelines and wear protective gear. Children should avoid playing in soil or dust near old buildings or areas with known lead contamination.
  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