We perform millions of drug tests annually as a leading drug testing provider. Learn more about the most common reasons for testing, including pre-employment, random, and DOT.
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We offer a broad range of drug screening options that allow you to combine and customize your program to meet your unique business needs, all from a single, convenient provider.
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Drug screening
Drug screening
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What Happens at a Drug Screening?
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Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA certified laboratories that provide HIPAA covered services. Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA covered services.
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