About Us

Sonora Quest Laboratories has approximately 3,000 employees serving more than 20,000 patients every day throughout Arizona. We offer a local comprehensive test menu which encompasses routine, molecular, prescription drug monitoring, cytogenetic, and pathology testing services. Ninety-eight percent of all testing is performed at our primary testing facilities located in Tempe, Tucson, Flagstaff, Prescott, and Yuma.
Sonora Quest Laboratories is accredited by the College of American Pathologists (CAP) which is the gold standard in laboratory accreditation, helping laboratories to maintain accuracy of test results and ensure accurate patient diagnosis. This accreditation ensures the highest standard of care for all laboratory patients as CAP inspectors examine laboratory staff qualifications, equipment, facilities, safety program and record, and overall management.