We wanted to reassure you that Arizona Oncology remains open to provide medically necessary, life-sustaining care. In addition, our expert care team can now see patients through scheduled virtual appointments on a secure platform from the comfort and safety of your home.

Updated visitor policy: For the safety of our patients and staff, no visitors will be permitted into the clinic. Family members and caretakers may participate in the appointments remotely by phone or video conference if desired. All patients and staff will be required to wear a face covering(or mask) that covers the nose and mouth. This new policy reflects the recent recommendations by the CDC to reduce community-based transmission.

If you have flu-like symptoms, you should contact Arizona Oncology before visiting our clinics for scheduled appointments. This includes fever and symptoms of respiratory illness, such as coughing or difficulty breathing.

We ask that you follow our tips to stay healthy and to help do our part in prevention of spreading of these viruses.

Locations and Physicians

Sharon Ondreyco, MD

Patient Portal Genetic Testing


Medical Oncology & Hematology


Glendale - Saguaro Cancer Center
7200 W. Bell Road, Building A
Glendale, AZ 85308
Phone: (623) 487-4822
Fax: (623) 334-9881

Scottsdale - Gynecologic and Medical Oncology, Hematology
10460 N. 92nd Street, Suite 402
Scottsdale, AZ 85258
Phone: (480) 860-2540
Fax: (480) 860-2536

Sharon Ondreyco, MD


Ohio State University

Medical School

Ohio State Medical School


University of Kansas Medical Center, Kansas City, KS


University of Kansas Medical Center, Kansas City, KS


University of Utah Medical Center, Salt Lake City, UT

Board Certification




Academic Honors & Professional Achievements

Vice Chief of Staff and Chief of Medicine at Maryvale Hospital
Named a top Breast Cancer Doctor in America, Redbook Magazine, 2001
Listed in “The Best Doctors for Women,” Ladies Home Journal, 2002 and 2008
Phoenix Magazine’s Top Docs, 2005 and 2009
Named to “Best Doctors in America” List, 2005-2006, 2009-2010
Guide to America’s Top Physicians, 2004, 2005 and 2006
Patients Choice Award Winner 2010


Founder of the Phoenix Oncology Society
Co-founding member of The Arizona Clinical Oncology Society 

In The Media

Congratulations to Arizona Oncology’s TOP DOCS