Sonora Quest Laboratories

Sonora Quest Laboratories is an independently operated joint venture between Banner Health and Quest Diagnostics. It is the largest integrated laboratory system in the United States, with approximately 3,200 employees and serving more than 26,000 patients daily in Arizona. We are the leader in the Arizona clinical laboratory testing market share, performing nearly 90 million diagnostic tests annually. We offer a local comprehensive test menu, including routine, molecular, prescription drug monitoring, genetics/genomics, and pathology testing services. Ninety-eight percent of the tests are conducted at our major testing facilities located in Tempe, Tucson, Flagstaff, Prescott, and Yuma.