Drug screening

Quest Diagnostics

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Reasons for drug testing

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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.

Products and services

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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.

Online solutions

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By choosing Quest Diagnostics as your drug testing company, you will gain all of the advantages of proven technology, coupled with exceptional service and personal support.

Knowledge center

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We provide you with a variety of drug testing resources, tools and information to help you create the best program.
Our resources

The real costs of drug testing

Drug testing calculator

Every company and every industry have different costs and different risks. Get an accurate picture of your ROI with the new Savings Calculator.
 
Estimate your savings