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Upcoming holiday closures 

Quest Patient Service Centers will be closed on Friday, July 3 and Saturday, July 4, 2026, in observance of Independence Day, and to give our frontline team the time to recharge. Don't let the holiday interrupt your care. Plan your visit today.

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Drug Positivity, Co-Detection Patterns, and Demographic Predictors in Patients Seeking Substance Use Disorder Treatment, United States, 2023