- Quest Diagnostics is the nation's leading provider of diagnostic testing, information and services, with more than 43,000 employees. Headquartered in Madison, NJ, Quest Diagnostics clients include patients and consumers, physicians, hospitals, health insurers, employers and government agencies.
- LabCorp is one of the world's largest clinical laboratories. Headquartered in Burlington, North Carolina, LabCorp has more than 23,500 employees and offers more than 4,400 clinical tests ranging from routine blood analyses to the most sophisticated molecular diagnostics.
- Headquartered in Valencia, CA, U.S. HealthWorks was founded in 1995 to provide innovative occupational health care services to both large and small employers in a wide range of industries. The company operates 128 healthcare facilities in the United States.
Concentra - Founded in 1979, Concentra's mission is to create and deliver healthcare solutions, patient and claimant outcomes, and business results that make clients more successful. based in Addison, TX, Concentra operates more than 310 medical centers in 40 states.
EMSI - Examination Management Services, Inc. (EMSI) provides medical information, risk management and investigative services to the insurance, healthcare, legal, wellness and business communities.
Orasure Technologies - OraSure Technologies is the leading supplier of oral-fluid collection devices and in vitro diagnostic assays to the employment, criminal justice, drug treatment, life insurance and public health markets for the detection of abused drugs.
- As the nation’s largest physician-owned and managed occupational health care company, WorkCare has provided occupational healthcare services to some of the world’s most prominent organizations since 1984. WorkCare's board-certified occupational health physicians are passionate about delivering their mission to improve employee health, productivity and safety through physician-managed consulting services, technology-based information systems and customer-focused business models.
Premier Biotech - A manufacturer of innovative, top quality drugs of abuse tests, Premier Biotech delivers the most comprehensive Point of Care (POCT) testing menu. Premier Biotech’s product portfolio is fully customizable and includes exclusive product lines of oral fluid and integrated urine cup devices. Headquartered in Minneapolis, Minnesota, Premier Biotech focuses on delivering an unprecedented, personalized customer experience. Premier Biotech Products are made in the USA.