Robert B. Ash,

M.D.

Radiation Oncologist

Location: City of Hope Duarte
1500 East Duarte Road
Duarte, CA 91010

Specialties: Radiation Oncology

Education

Medical school:

Degrees

1995, M.D., Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
1991, B.S., Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada
1990, B.M., Memorial University of Newfoundland, St. John’s, Newfoundland and Labrador, Canada

Fellowship

2000, Postgraduate Training IMRT, University of California San Francisco, San Francisco, CA

Residency

2000, Radiation Oncology Residency, University of Western Ontario, London, Ontario, Canada

Professional Experience

2018–present, Assistant Clinical Professor, Department of Radiation Oncology, City of Hope, CA
2007–present, Medical Director of Radiation Oncology and Radiation Oncologist, St. Joseph Hospital of Orange, Orange, CA
2000–2007, Associate Professor, University of Western Ontario, London, Ontario
2000–2007, Staff Radiation Oncologist, London Regional Cancer Centre, London, Ontario
2001–2005, Director, Undergraduate Medical Education for Oncology, University of Western Ontario, London, Ontario

Academic Appointments

Assistant Clinical Professor, Department of Radiation Oncology
Medical Director of Radiation Oncology, St. Joseph of Orange

About Me

Robert Ash, M.D., is a seasoned radiation oncologist with more than 20 years of experience, now bringing his expertise to City of Hope^® through a partnership with his home institution of St. Joseph Hospital of Orange.

Throughout his career, Dr. Ash has earned recognition for both his clinical excellence and the compassionate way he connects with patients, while his skills and expertise include performing advanced radiation procedures such as stereotactic radiosurgery for brain and lung tumors, as well as intraoperative radiation therapy for breast cancer. His precision-based approach allows him to deliver targeted, effective treatments while minimizing side effects.

Originally from Canada, Dr. Ash earned his medical degree from Memorial University of Newfoundland. He continued his postgraduate training at the University of Western Ontario and the University of California, San Francisco. A firm advocate of multidisciplinary care, Dr. Ash views radiation oncology as an essential part of a collaborative treatment plan for most patients. He believes that the best outcomes come from open communication, teamwork and a shared commitment to helping patients achieve the best possible quality of life.

Patient reviews: The patient ratings and comments on this page are obtained from an external Press Ganey^® outpatient survey provided to all eligible City of Hope patients within one to two weeks of their treatment occurrence. Raw data from the answers to the survey questions about our physicians are calculated by Press Ganey into a one- to five- star rating. In the spirit of transparency, all patient comments are posted as written by the patient, whether they are positive or negative. We only exclude comments if they are deemed to be slanderous or libelous, contain profanity or vulgar language, or do not relate to the patient's experience with the doctor involved. As a result, the comments are the views and opinions of the patients surveyed and are not endorsed by, and may not necessarily reflect the opinion of, City of Hope.