Physician Profile

Ronald D. Ennis, MD


(71 reviews)

Ronald D. Ennis, MD,

Ronald D. Ennis, MD


(71 reviews)

  • Medical Director, Clinical Network for Radiation Oncology
  • Radiation Oncologist
Contact Information

To schedule a new patient appointment call 844-CANCERNJ (844-226-2376)
To schedule a follow-up appointment call 732-235-7615
For all other inquiries call 732-235-2465.

About Me

I am a radiation oncologist with expertise in prostate cancer, genitourinary malignancies and gynecologic malignancies. I have extensive experience with high dose-rate and low dose-rate brachytherapy, stereotactic body radiosurgery (a.k.a. "Cyberknife"), intensity modulated radiotherapy, three-dimensional conformal radiotherapy, image-guided radiotherapy, hormone therapy, surveillance and survivorship.  I believe strongly in a compassionate patient-centered approach, finding the optimal care for each patient taking into account his/her individual needs, preferences and medical conditions.

As the Medical Director of the Clinical Network for Radiation Oncology for Rutgers Cancer Institute of New Jeresy, I work to unify the highest quality radiation oncology practice across our facilities.

On a national level, I am a member of the Board of Directors of the American Society for Radiation Oncology (ASTRO), the largest society representing the radiation oncology specialty, serving as the Vice Chair of the Government Relations Council.  I have been involved in government relations for ASTRO for over a decade, helping the society advocate on behalf of cancer patients and the field on a myriad of issues.

Additionally, since 2015, I have served as a member of the Advisory Committee for the Use of Medical Isotopes (ACMUI) of the U.S. Nuclear Regulatory Commission (NRC).  This thirteen-member committee advises the NRC on regulatory issues regarding the safe use of radioactive materials in medical practice.

Prior to joining Rutgers Cancer Institute of New Jersey, I served as Chairman of the Genitourinary Oncology Disease Management Team within the Mount Sinai Health System, unifying practices across the health system and leading the process of adopting practices aligned with the value-based approach of the Oncology Care Model of the Center for Medicare and Medicaid Innovation. In addition, I served as Director of Radiation Oncology at St. Luke's-Roosevelt Hospital as part of the Continuum Health Partners (CHP) and continued in that capacity at what became known as Mount Sinai West Hosptial when CHP merged with Mount Sinai.

Before taking the Directorship at St. Luke's-Roosevelt Medical Center in 2005, I was a faculty member in Radiation Oncology at Columbia University College of Physicians and Surgeons and the Medical Director of the Department of Radiation Oncology at New York Presbyterian Hospital-Columbia.

I received my B.A. from Columbia University, graduating Phi Beta Kappa and Cum Laude with a major in computer science. I received my medical degree from Yale University School of Medicine and completed my residency training in Radiation Oncology at Yale-New Haven Hospital.

I conduct clinical research and have published dozens of articles, book chapters and editorials focusing on prostate cancer, gynecologic cancer and health policy. I also lecture throughout the country on issues related to prostate cancer and health care policy. 

Clinical Expertise

Prostate cancer, gynecologic cancers, gastrointestinal cancers, brachytherapy, stereotactic body radiosurgery (a.k.a. "Cyberknife"), intensity modulated radiotherapy, three-dimensional conformal radiotherapy, and image-guided radiotherapy. 


Since 2001, I have been listed in Castle Connolly's List of Best Doctors every year. 

Ratings and Reviews

5 Overall

Based on 71 reviews


Give easy to understand instruction


Spend enough time with you


Show respect for what you say


Provider listen carefully to you


Provider expl in way you understand

April 25, 2024

Dr. Ennis was great explaining my options.

April 22, 2024

Provider, & staff were excellent!

April 17, 2024

Great doctor who cares.

April 3, 2024

DR. Ennis is a very excellent and very helpful Physician

April 2, 2024

Great experience. Dr. Ennis is very professional in all areas and I trust him with my health.

March 1, 2024


January 12, 2024

Dr. Ennis, intelligent, compassionate, personable, professional, I feel very fortunate that he is my doctor. He is a credit to his profession!!!!

January 3, 2024

Very caring and informative.

December 29, 2023

Visit was beneficial.

December 12, 2023

Dr. Ennis is the 3rd doctor I saw & he & RWJ came as a referral. Great experience made sure I felt comfortable w/my decision. He is an asset to RWJ.

December 3, 2023

Good experience - provider showed he cared, as he answered my questions regarding treatment.

October 2, 2023

*Dr. Ennis is the most professional & caring doctor I have had the pleasure of seeing!

August 24, 2023

*Dr. Ennis saved my life!! Professional, courteous, caring, would rate a 10 not just a 5!!


Accepted Health Plan information is only as accurate as the most current information submitted. Prior to your appointment, it is advisable to verify with your insurance company they are still a participating plan prior to receiving services or care. Each plan is different and some provide different levels of coverage that could make a difference in your out-of-pocket costs. It is always best for the patient receiving care to contact their insurance company to obtain more information.

  • Aetna
  • Amerigroup
  • Cigna
  • Consumer Health Plan
  • Horizon BCBS
  • Horizon NJ Health
  • Magnacare
  • Medicaid
  • Medicare
  • Multiplan
  • Oxford Health
  • Qualcare HMO
  • Qualcare PPO
  • United Community
  • United Healthcare
  • United Medicare
  • WellCare