Dr. Ryan Robetorye

Dr. Anita Koszyk-Szewczyk joined Ironwood Cancer & Research Centers in July 2009, after completing her Hematology and Oncology training at Penn State University Hershey Medical Center. Dr.Szewczyk has earned her medical degree at Jagiellonian University Collegium Medicum in Krakow, Poland and Honours Biology at McMaster University Hamilton, Canada. She served as Chief Fellow at Penn State University and her special interests include all forms of adult cancers and hematological disorders with special interest in Breast Cancer. She is originally from Poland and Canada. She is board certified in Internal Medicine, Hematology and Oncology. Dr. Koszyk is rated as a Distinguished provider by MediFind in the treatment of Vitamin D Deficiency. Her top areas of expertise are Breast Cancer, Paget Disease of the Breast, Childhood Iron Deficiency Anemia, Iron Deficiency Anemia, and Bone Marrow Aspiration.

Sharon Ondreyco is a Hematologist Oncology specialist and a Hematologist in Glendale, Arizona. Dr. Ondreyco is rated as a Distinguished provider by MediFind in the treatment of Vitamin D Deficiency. Her top areas of expertise are Breast Cancer, Paget Disease of the Breast, Familial Colorectal Cancer, and Chronic Lymphocytic Leukemia (CLL).

Dr. Roberts has been treating patients in Arizona for over 20 years and is board certified in medical oncology and hematology. Dr. Roberts is a member of the American College of Physicians, American Society of Internal Medicine, and American Society of Clinical Oncologists. He provides advanced high-quality compassionate cancer care in a community setting.  Dr. Roberts has a special interest in treating patients with lung, breast, colon, prostate, and hematologic malignancies. He is a member of the American College of Physicians, American Society of Internal Medicine, and American Society of Clinical Oncologists. Dr. Roberts has been recognized as a top doctor in PHOENIX magazine and a super doctor in Phoenix, and has been recognized by the Leukemia Lymphoma Society (LLS) and the American Society of Clinical Oncology (ASCO). He received a teaching excellence award from St. Joseph's hospital and has received numerous other nationally recognized physician awards. Dr. Roberts has extensive experience in research, serving as the principal investigator in more than 100 studies. He was a founding member of the Arizona Institute of Breast Health as well as the Center for Thoracic Disease.To help people achieve health for life. Dr. Roberts is rated as an Advanced provider by MediFind in the treatment of Vitamin D Deficiency. His top areas of expertise are Familial Colorectal Cancer, Familial Prostate Cancer, Follicular Lymphoma, and Paget Disease of the Breast.