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Less than a third of Wisconsin children on Medicaid were tested for lead poisoning at ages 1 and 2 last year, despite a federal requirement that all such children get the testing, a new state report says.

Children on Medicaid are three times as likely to have lead poisoning than other children, so many children who could face developmental problems from lead exposure are not being identified, a Madison pediatrician said.

“We’re missing a lot of kids,” said Dr. Beth Neary, who is on the steering committee of the Wisconsin Environmental Health Network. “We’re missing a lot of opportunities to prevent further poisoning and to intervene.”

Elizabeth Goodsitt, spokeswoman for the state Department of Health Services, said the department “is working with multiple partners at the state and local levels to provide outreach to families, communities, and health care providers on the importance of blood lead testing in an effort to increase testing.”

In 2016, 32 percent of children on Medicaid were tested for lead poisoning at ages 1 and 2, according to a health department report released this month.