Quest Diagnostics Incorporated DGX

DGX Company Overview

Quest Diagnostics Incorporated is a U.S.-based diagnostic information services company that provides laboratory testing, diagnostic insights, and related healthcare services to physicians, hospitals, health systems, employers, insurers, government agencies, and consumers. The company operates primarily in the healthcare diagnostics and clinical laboratory industry, with services spanning routine clinical testing, advanced diagnostics, anatomic pathology, genomic and molecular testing, drug monitoring, and employer health screening programs. Quest Diagnostics generates most of its revenue through laboratory testing services reimbursed by private insurers, government healthcare programs, employers, and direct-pay consumers.

Quest Diagnostics was founded in 1967 as Metropolitan Pathology Laboratory and evolved through multiple corporate restructurings and acquisitions before becoming an independent public company in 1996 following its spin-off from Corning Incorporated. Over time, the company expanded its national laboratory network, acquired regional diagnostic businesses, and invested in advanced testing capabilities including genomics, precision medicine, and digital health solutions. Its scale, broad payer relationships, extensive logistics infrastructure, and nationwide laboratory network have positioned it as one of the largest diagnostic testing providers in the United States.