Quest Diagnostics and Corewell Health form joint venture in Michigan

Quest Diagnostics (DGX) and Corewell Health, a 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, 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, 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. Equity ownership of the joint venture will be shared 51% by Quest and 49% by Corewell Health. Additional terms were not disclosed. The parties expect to complete the joint venture transaction in Q1 2026. The parties expect the new laboratory to be operational in Q1 2027.