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Lead in Whole Blood (Mass Concentration)

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

This test measures the amount of lead present in your blood, which helps assess exposure to this heavy metal that can harm your body, especially in children.

Quick summary

["Lead exposure can cause serious health issues, especially in kids, and this test helps track how much lead is in your system."]

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

Key facts at a glance

LOINC
9436-7
Short code
Lead Fld-mCnc
Synonyms
Lead Fld-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 been exposed to lead (e.g., from paint, dust, or certain jobs), if you have symptoms like headaches, fatigue, or behavioral changes, or if you’re a child in a high-risk area. It’s also used to monitor treatment for lead poisoning.

What Does the Test Involve?

A small blood sample is taken from a vein in your arm. The blood is then analyzed to measure lead levels. This test is typically done in a lab using specialized equipment to detect lead accurately.

What Are Common Symptoms of High Lead Levels?

Lead poisoning can cause symptoms ranging from mild (like stomach pain or nausea) to severe (like brain damage, seizures, or developmental delays in children). Some people may not show symptoms until lead levels are very high. Symptoms can also vary widely depending on how long you’ve been exposed.

How Is This Test Different from Other Lead Tests?

This test specifically measures lead in whole blood, which is often used for recent exposure assessment. Other tests, like urine lead, measure lead that has been stored in the body for longer periods.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Lead Blood Test

Frequently asked questions

What does a high lead level mean?
A high lead level may indicate recent exposure to lead, which can be harmful to your health. In children, even slightly elevated levels can affect brain development and behavior. Your healthcare provider will discuss results and next steps based on your specific situation.
What if my lead level is low?
A low lead level generally means your body isn’t currently absorbing much lead. However, if you’ve had past exposure, your healthcare provider may still monitor you to ensure ongoing safety.
How often should I get this test?
Your healthcare provider will determine how often you need this test based on your exposure history, symptoms, and other risk factors. Regular testing may be recommended if you live in an area with known lead contamination or if you work in a high-risk occupation.
  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