Sonora Quest Laboratories, a joint venture between Banner Health and Quest Diagnostics, is the nation’s largest integrated laboratory system with approximately 3,100 employees serving more than 23,000 patients every day throughout Arizona. We are the market share leader in clinical laboratory testing in Arizona, performing more than 60 million diagnostic tests per year. We offer a local comprehensive test menu which encompasses routine, molecular, prescription drug monitoring, genetics/genomics, 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.

Sonora Quest Laboratories has over 70 Patient Service Centers located conveniently throughout Arizona and offers online appointment scheduling on desktop and mobile devices on SonoraQuest.com as a convenience to patients. We are contracted and considered in-network with most major health plans and offer reduced pricing for patients who wish to pay at time of service due to lack of insurance coverage or high-deductibles. We also offer patients a number of ways to obtain their own lab results. 

Sonora Quest Laboratories has proven its focus on quality, recognized by numerous awards representing our hard work and commitment to patient care. We are the only healthcare company ever to receive our state’s highest quality award, the Arizona Governor’s Award for Quality. No organization has attained this award since. Other recent awards include a 2017 IMPACT Award for Exceptional Innovator from the Greater Phoenix Chamber of Commerce; six consecutive #1 Bioscience Company in Arizona recognitions by Ranking Arizona / AZ Big Media, most recently in 2017; and eight consecutive Top 40 Most Admired Companies in Arizona recognitions by az magazine / BestCompaniesAZ, most recently in 2017.

At Sonora Quest Laboratories, our Ethical Behaviors, Mission, Vision, and Values are more than just words on paper. They are the guidance we use in everything we do.


Our Mission

  • Drive Customer Value Across the Continuum of Care

Our Vision

  • Be the Trusted Leader in Diagnostic and Information Services

Our Values

  • Integrity
    Our behaviors exhibit the highest ethical standards and reflect our commitment to respect the dignity of those we serve and each other.
  • Accountability
    We are obligated and willing, as an organization, and as individuals, to accept responsibility for our actions.
  • Compassion
    We are caring and respectful in our dealings with patients, customers and each other.
  • Collaboration
    We believe in teamwork and the limitless possibilities of collaborative energy. We achieve excellence by putting collective goals ahead of personal interests. We support and encourage open communication and meaningful cooperation among colleagues from varying backgrounds and disciplines. We respect individual differences, and we value diversity.
  • Quality
    This value is central to our success; the patient comes first in everything we do. Our passion is to provide every patient and every customer with services and products of uncompromising quality - error free, on time, every time.

Our Ethical Behaviors

  • Honorable
  • Truthful
  • Fair
  • Decent
  • Just