Reasons for drug testing
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
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.
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.