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

Unsurpassed National Coverage with Worldwide Presence

Quest Diagnostics provides access to high quality testing and services throughout the United States. With over 2,000 patient service centers, approximately 150 rapid response laboratories, 30-plus regional laboratories and esoteric testing laboratories on both coasts they provide a broad range of services to their customers. They also have an international presence and the capability to provide services beyond their brick and mortar locations world-wide.