If the initial screen yields a non-negative result, the confirmatory test will be reported within 48-72 hours of receipt. Here’s how…įor a routine lab-based urine drug screen, you can expect your negative results to be returned within 24 hours of the specimen arriving at one of our four SAMHSA-certified laboratories. How would you rate your drug testing laboratory on these four pillars of a solid provider? At Quest Diagnostics, we consistently strive to excel in these four key areas. Accessed August 13, 2021.Turnaround time, customer service, collection site network, new product introductions.
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