We are one of the Most Admired Companies in Arizona and have received that honor for the past six years, most recently in 2019. Sonora Quest, an independently run joint venture between Banner Health and Quest Diagnostics, is the nation’s largest integrated laboratory system with approximately 3,500 employees serving more than 26,000 patients every day across Arizona. Unlike national diagnostic laboratories, it provides a continuum of care for all sectors of the healthcare industry. As the market share leader in clinical laboratory testing in Arizona, it performs nearly 90 million diagnostic tests per year.
