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Phone numbers


Client services

1.866.MyQuest (1.866.697.8378)

Drug Toxicology Hotline

For assistance with prescription drug monitoring results, please contact Quest Diagnostics toxicology consultant specialists. They are available Monday – Friday, 8:00 AM to 6:00 PM Eastern Standard Time.

1.877.40.RXTOX (1.877.407.9869)

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