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Blood lead test

Also called: Lead level, Lead screening

A blood lead test checks for lead exposure, which can harm children's development.

SampleBlood
Fasting?Usually not needed
ResultsMinutes to a few days
Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.

What the test is

Children are often tested at 1 and 2 years old, especially in older housing or areas at higher risk.

Why it's done

  • Routine screening at ages 1 and 2
  • Living in a home built before 1978
  • Pica (eating non-food items)
  • Work or hobbies with lead

Getting ready and what happens

  • No preparation is needed.

How the test is done

  • A finger or heel prick; high results are confirmed with a vein draw.

What the results mean

ResultTypical range for adults
CDC reference value for children3.5 mcg/dL or higher needs follow-up

Normal ranges vary from lab to lab and can differ by age, sex, and pregnancy. Your report lists your lab's own range next to each result. A result a little outside the range is often not a problem.

High

Find and remove the source, retest, and follow up on development. Very high levels may need treatment.

Questions to ask your provider

  • What do my results mean for me?
  • Do I need to repeat this test or have other tests?

Risks

A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.

Related conditions

Related tests

Sources

Last updated 2026-11-13.