The Quest Diagnostics difference Bringing together quality, speed, and technology to power advanced, affordable diagnostics for all. No trade-offs required.

Quest Diagnostics Unlock access to your Quest solutions For Patients MyQuest Get lab results sent directly to your smartphone, tablet, or desktop with MyQuest. You can even manage test …

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Quest Diagnostics has headquarters in the U.S. and operations in India, Ireland, and Mexico. Our products and services are used by customers in over 130 countries. We also collaborate with …

Visit one of Quest’s 2,200 Patient Service Centers - when it’s convenient for you. With thousands of locations in neighborhoods across the country, you’re never too far from getting the testing …

Find a Quest Diagnostics location nearby to complete sample collection for doctor-ordered or self-purchased lab tests.

Understanding your Quest Diagnostics lab test results helps you and your doctor make the best decisions for your health. Take control of your health today.

Arrive prepared for your lab test at Quest, especially if your test requires fasting or you're bringing a child in for a lab visit.

Put yourself in control of your health by purchasing lab tests online from Quest without needing to wait for a doctor appointment. You'll get the results sent directly to you with the option to speak …

Quickly find and schedule a convenient appointment with Quest Diagnostics.