A clinical laboratory and its owner have been accused of submitting over $400,000 in Medicaid claims for unauthorized urine drug tests, the attorney general's office in Massachusetts said Friday.

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The residential sobriety tests were medically unnecessary, the office said in a news release. Laboratories may not bill Medicaid for them.

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Prosecutors in Massachusetts allege that a Burlington-based laboratory fraudulently submitted over $400,000 in Medicaid claims for urine tests.

The Burlington-based lab and its owner were indicted last month by a statewide grand jury on two counts each of Medicaid false claims, false claims and larceny over $1,200.

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The lab and owner are scheduled to be arraigned in Middlesex Superior Court on March 21. It wasn't immediately known if they had attorneys.

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The attorney general's office said last year, one of its Medicaid Fraud Division investigations resulted in charges against several clinical laboratories, their owners, marketing companies, and a doctor in connection with Medicaid fraud, money laundering and kickbacks involving over $2 million in urine drug tests.