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Benjamin Cahan,

M.D.

Radiation Oncologist

4.9 (128 Ratings)
Biography photo
Location
City of Hope Mission Hills Radiation Oncology
15031 Rinaldi Street, Suite 100
Mission Hills, CA 91345
Specialties
Radiation Oncology
Education
Medical school:

Board Certifications

  • California Medical License, Medical Board of California

Degrees

  • 2011, M.D., David Geffen School of Medicine at University California Los Angeles, Los Angeles, CA
  • 2005, Postbaccalaureate Premedical Program, Columbia University, New York, NY, Post-baccalaureate Premedical Program
  • 2001, B.A. in Economics, Columbia University, New York, NY, B.A. Economics

Residency

  • 2015–2016, Chief Resident, Radiation Oncology, Department of Radiation Oncology, City of Hope, Duarte, CA
  • 2012–2015, Resident, Radiation Oncology, Department of Radiation Oncology, City of Hope, Duarte, CA

Professional Experience

  • 2016–present, Radiation Oncologist and Assistant Clinical Professor, Department of Radiation Oncology, City of Hope, Mission Hills and Santa Clarita, CA
Academic Appointments
  • Assistant Clinical Professor, Department of Radiation Oncology
  • Medical Director, City of Hope Mission Hills
  • Co-Chair, Lung and Skin Cancer Disease Team
About Me

Benjamin Cahan, MD, is a board-certified radiation oncologist, assistant clinical professor in the Department of Radiation Oncology and medical director for City of Hope® Mission Hills, a radiation oncology location for the larger City of Hope network. 

Dr. Cahan is experienced in all aspects of radiation therapy and has particular expertise in advanced technologies such as image-guided radiotherapy, stereotactic radiosurgery and stereotactic body radiation therapy. His goal for his patients is to blend leading-edge science, creativity and innovation with genuine compassion in an effort to provide expert, empathetic care. 

Dr. Cahan earned his medical degree from the University of California, Los Angeles (UCLA) David Geffen School of Medicine, where he graduated with Alpha Omega Alpha honors. He completed his internship at UCLA-Olive View Medical Center before joining City of Hope in 2012 for his residency in radiation oncology. During his training, he served as chief resident. 

Deeply committed to patient-centered care, Dr. Cahan’s research explores how cancer treatments affect quality of life. His clinical philosophy emphasizes not only delivering the most effective medical care but also providing emotional support and reassurance to his patients.

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.
Mar 27, 2026
5.0
"My provider listens and explains everything I need to know and understand"
Feb 22, 2026
5.0
"I found Dr. Cahan very knowledgeable in his field. He stopped, listened and answered our questions in a way easy for laymen to understand."
Feb 14, 2026
5.0
"All was really great a 10"
Feb 13, 2026
5.0
"All very good"
Jan 15, 2026
5.0
"Nice"
Dec 13, 2025
5.0
"Excellent"
Oct 9, 2025
5.0
"Good"
Oct 9, 2025
5.0
"Good"
Sep 28, 2025
4.0
"Good"
Sep 28, 2025
4.0
"Good"
Sep 23, 2025
5.0
"Genuine concern was shown."
Sep 6, 2025
5.0
"Excellent experience."
Sep 6, 2025
5.0
"Very knowledgeable and personable provider."
Aug 28, 2025
4.9
"No bad experience"
Jul 19, 2025
4.4
"As a patient, I always want more info"
Jul 10, 2025
5.0
"Buena"
Jun 27, 2025
5.0
"The doctor assured me he had reviewed my scan and medical documents & diagnosis and would continue to be involved in my care should his services be neccesary at a later date. He also was in touch with my oncologist and would continue to be involved in my care."
Jun 23, 2025
5.0
"Just very good"
Jun 23, 2025
5.0
"Just very good no bad at all"