Company Info

"In health care, it's vital that a job gets done properly. But when people make a special effort to remember the human side of what is going on, then the job becomes a labor of love."

— Written by the family of a patient in a heartfelt letter of thanks to several of our employees.

Quest Diagnostics is People. Dedicated people who understand that behind every specimen and result there is a human life.

Our employees play a critical role in healthcare delivery and enable better healthcare choices by providing unsurpassed diagnostic insights to our customers. Quest Diagnostics employees are dedicated to serving our customers, and Our Vision, Mission and Values guide everything that we do.

Unsurpassed National Coverage with Worldwide Presence

We offer convenient access to high quality testing and services throughout the United States. We have laboratories in or near all major cities, and esoteric testing laboratories on both coasts, providing a broad range of services to our customers. Convenient specimen collection options include in-office phlebotomy and courier services and more than 2,000 conveniently located patient service centers across the country.

We also have a growing international presence, including laboratory operations in the United Kingdom, México, Puerto Rico, and India. Our businesses also offer services and administrative offices in many other countries.

QuestCares Corporate Responsibility

Community involvement is one way we demonstrate our commitment as a socially responsible organization and give back to our local communities. Read more >