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About Us

Who We Are

Sonora Quest Laboratories, a joint venture between Banner Health and Quest Diagnostics, is the nation’s largest integrated laboratory system with approximately 3,000 employees serving more than  20,000 patients every day throughout Arizona. We are the market share leader in clinical laboratory testing in Arizona, performing more than 57 million diagnostic tests per year. 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.

Sonora Quest Laboratories has 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, ranked one of the Best Places to Work in Arizona by the Phoenix Business Journal for six consecutive years, most recently in 2014, continues to be recognized for our exemplary quality processes. In 2011, we were awarded with a Business Ethics Award by the Better Business Bureau of Greater Arizona. We are the first and only health care establishment to ever receive the Arizona Governor’s Award for Quality.  We have also been named the #1 Bioscience Company in Arizona by Ranking Arizona for four consecutive years, most recently in 2015. 

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

  • Safely perform error free work, on time, every time.

Our Vision

  • To be recognized as the trusted leader in diagnostic testing 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

Our LEADership Philosophy

At Sonora Quest Laboratories, strong leadership begins at the top, and our President & CEO, David A. Dexter, “walks the talk.” David was honored as the “2008 CEO of the Year” by the Arizona Corporate Excellence Awards (ACE). The Phoenix Business Journal selected him as one of “The Top 25 Most Admired CEO’s in the Valley for 2009.”

Yet David gives the credit for those honors to his leadership team and the employees of Sonora Quest Laboratories, who conduct  business by living our core Values and following our Code of Conduct and Ethical Behaviors, which is why Sonora Quest Laboratories was chosen by The Better Business Bureau of Greater Arizona as a ‘2011 Ethics Award Winner.’

Sonora Quest Laboratories has been named a ‘Best Places to Work’ by the Phoenix Business Journal for seven consecutive years, most recently in 2014. Our Leadership and our employees also make a difference by supporting many charities in the communities in which we work and live, and our efforts were recognized by the Juvenile Diabetes Research Foundation as the Top Corporate Sponsor in the Southwest Chapter for 2009. In addition, Sonora Quest Laboratories and our employees were honored with the ‘2009 Arizona Community Impact Award’ by the Arizona Corporate Excellence Awards, an award that given to one company each year in Arizona that is really making a difference for those in need.

Arizona Business Magazine and Best Companies AZ honored Sonora Quest Laboratories as one of their 'The Most Admired Companies in Arizona for the past five years, most recently in 2014.' Additionally, and also in 2013, they recognized Sonora Quest Laboratories with a Spotlight Award for Leadership Excellence.

We know that the key to our employees enjoying a healthy work/life balance is directly linked to the people skills of our entire leadership team. That is why every leader at every level is trained, coached, and accountable for developing their skills in the key competencies that continue to build our leadership legacy: 

  • Coaching and developing employees
  • Driving individual, team, and organizational performance
  • Inspiring loyalty and trust within and among team members
  • Managing work
  • Partnering within and across teams
  • Influencing through personal power
  • Selecting talent

And as for “walking the talk”, our CEO and members of the Senior Leadership Team personally attend our LEAD modules to dialogue with participants and reinforce the high value Sonora Quest Laboratories places on leadership development.