Corewell Health And Quest Diagnostics Form Joint Venture To Build Advanced Michigan Lab And Manage 21 Hospital Labs Statewide

Parties to build state-of-the-art laboratory in Southfield to serve physicians and patients across the state

Quest will also manage Corewell Health's 21 hospital labs

SOUTHFIELD, Mich. and GRAND RAPIDS, Mich. and SECAUCUS, N.J., Aug. 26, 2025 /PRNewswire/ -- Corewell Health and Quest Diagnostics (NYSE:DGX), a leading provider of diagnostic information services, have signed a definitive agreement to enter into a joint venture to expand access to innovative, quality and affordable laboratory services in Michigan.

The joint venture, Diagnostic Lab of Michigan, LLC, will be based at a state-of-the-art laboratory facility at the Corewell Health Southfield Center in Southfield, Michigan. The future 100,000-square-foot facility will feature advanced technologies, such as automated microbiology and high-throughput molecular testing.

In addition, Quest will provide the full complement of its Collaborative Lab Solutions (Co-Lab), including reference laboratory testing, professional laboratory management services, laboratory workforce and supply chain management, and analytics, for all of Corewell Health's 21 inpatient and outpatient hospital labs. These hospitals labs are located across the state and will remain open after the new lab is constructed.