LabOne

LabOne was a prominent provider of diagnostic testing and health screening services, specializing in clinical, toxicology, and insurance-related laboratory work. Based in Lenexa, Kansas, the company operated one of the largest centralized laboratories in the United States, serving a diverse client base of insurance companies, employers, and healthcare providers. LabOne was particularly well-regarded for its paramedical services and employer drug testing programs. In 2005, the company was acquired by Quest Diagnostics for approximately $934 million, a move that consolidated Quest's leadership in the diagnostic testing industry. Its core operations, including the ExamOne brand, remain integral parts of Quest Diagnostics today.