Fox Chase patients may be eligible to receive third COVID-19 vaccine dose – Read More


Elias Obeid, MD, MPH

Elias Obeid, MD, MPH

Clinical Locations

Primary Location

Fox Chase Cancer Center
333 Cottman Avenue
Philadelphia, PA 19111


Interim Chief, Division of Breast Medical Oncology

Assistant Professor, Department of Clinical Genetics

Director, Breast, Ovarian, and Prostate Cancer Risk Assessment

Treatment Focus

Breast Cancer Treatment: particular interest in the treatment of triple-negative and hereditary breast cancers; Breast, Ovary, and Prostate Cancer Risk Assessment

Research Program

Treatment Philosophy

My philosophy in taking care of my patients is to spend as much time as possible listening to them. This allows me to know exactly what their fears and concerns are. I believe in working with our patients as a team to design the best plan of care for them,  and when appropriate for their families if we identify a susceptibility to developing cancer in that family.

Education and Training

Educational Background

  • MPH, University of Massachusetts, Amherst, Massachusetts, 2011
  • MD, American University of Beirut School of Medicine, Beirut, Lebanon, 2000


  • Board Certified in Medical Oncology
  • Board Certified in Internal Medicine
  • Board Eligible in Hematology
  • Pennsylvania Medical License


  • American College of Physicians (Fellow)
  • Honor Society of Phi Kappa Phi
  • American Society of Clinical Oncology
  • American Association for Cancer Research (AACR)

Honors & Awards

  • Main Line Today Top Doctors, 2019
  • Abbott-Gonzalez Research Fellow Award, University of Chicago, 2012
  • American College of Physicians - Connecticut (ACP-CT) Award for Volunteerism/Judge Research Awards, 2008
  • First Annual Award: Service for Mission, Hospital of Saint Raphael, New Haven, CT, 2008
Patient Stories

Tracy Gatto

Breast Cancer

Tracy Gatto

Breast Cancer

In 2011 at the age of 28, Tracy Gatto learned she had breast cancer after she discovered a lump in her breast. She sought a second opinion from a specialist at Fox Chase Cancer Center and immediately felt that was where she wanted to seek treatment. Tracy underwent chemotherapy, followed by surgery and reconstruction. Because of the BRCA1 genetic mutuation she most likely inherited from her father, Tracy had increased risk of ovarian cancer. She worked with the Risk Assessment Program, where she was referred to a surgical gynecologist to discuss the possibility of undergoing a prophylactic oophorectomy to remove her ovaries. Today, Tracy is doing well and even took part in Paws for the Cause, an annual dog walk and fundraiser hosted by Fox Chase, to give back. "It really takes a special person to work at Fox Chase. Everyone I met had a smile on their face and was incredibly positive," she said. "As a receptionist, I knew it can be a struggle to stay positive all day long. It’s hard to make cancer a positive experience, but I never left feeling discouraged."

Research Profile

Research Program

Research Interests

  • Genetic predisposition to breast cancer and ovarian cancer
  • Genetic predisposition to prostate cancer
  • Breast cancer: novel therapeutic interventions to improve outcomes for women with breast cancer and understanding the biology of the disease; immunotherapy

Lab Overview

The Risk Assessment Program at Fox Chase looks at your personal and possible inherited genetic factors that may put patients at higher possibility for getting cancer.  Our team comprehensively examines the risk of an individual for different cancer types, including — but not limited to — breast cancer, ovarian cancer, gastrointestinal cancers, prostate cancer, and melanoma. Such information is helpful in order to understand the chances of getting cancer and decrease the likelihood of cancer or to detect cancer early. The Department of Clinical Genetics is built on the success of Fox Chase's Margaret Dyson Family Risk Assessment Program (now Risk Assessment Program), which Dr. Mary Daly began in 1991. A high-risk screening clinic was developed for individuals with a family history of breast or ovarian cancer.

As a member of the Breast Cancer Research team at Fox Chase, we offer our patients emerging therapies for breast cancer where patients have the opportunity to enroll in national clinical trials unique to Fox Chase that target breast cancer. I am interested in the design and implementation of trials focused on the development of those new therapies. In collaboration with other scientists, we work on understanding the biology of breast cancer through translational studies. My particular interest is in tumor microenvironment and immunotherapy.

Lab Staff

Susan Montgomery, BSN, RN, GCN, OCN


Lisa Bealin, BS

Project Manager


Additional Publications




Our Patient Satisfaction Rating is an average of all responses to care provider related questions from our nationally-recognized Press Ganey Patient Satisfaction Survey. Learn more.


4.9 / 5.0


  • 4.9
  • 4.9
  • 4.9
  • 4.9
  • 4.9


  • No Star Ratings Available March 10, 2021
    Dr. Obeid is a wonderful doctor who takes excellent care of his patience. He treats the whole patient. He checks in and remembers things you may have said in passing years ago to help you.
  • 5.0
    March 09, 2021
    I love Dr. Obeid - thorough, attentive, compassionate.
  • 4.4
    February 16, 2021
    I had first appointment at 9am- dr didn't come in until 10am waiting for 1 hour in the appointment room. no apologies not respect for my time or the time I was waiting.
  • 5.0
    December 21, 2020
    wonderful care!
  • 5.0
    December 08, 2020
    excellent provider!
  • 5.0
    November 25, 2020
    Dr. Obeid is a wonderful provider as well as his nurse [...]. They both give fantastic service.
  • 5.0
    October 09, 2020
    Dr. Obeid is wonderful and I have recommended him to others!
  • 5.0
    September 19, 2020
    Love Dr. Obied and [...]
  • 5.0
    September 15, 2020
    always very welcoming. feels more like meeting with friends you haven't seen in a while.
  • 5.0
    August 27, 2020
    Felt comfortable and encouraged in spite of my bleak prognosis.
  • 5.0
    August 05, 2020
    We always have a good experience at Fox Chase with dr. & staff.
  • 5.0
    August 03, 2020
  • 5.0
    July 23, 2020
    Dr. Obeid and his staff were very understanding and thorough.
  • 5.0
    June 22, 2020
    Great experience. It shows, even in COVID, what a difference professionalism makes.
  • 5.0
    May 31, 2020
    All my doctors, Dr. [...] & Dr. Obeid are very kind & caring. [...]
  • 5.0
    May 22, 2020
    Dr. Obeid is always doing his best to help me.
  • 5.0
    May 22, 2020
    Dr. Obeid is caring, compassionate and thorough. He is an excellent doctor and I would highly recommend him.
  • 5.0
    May 17, 2020
    Excellent experience [...]
  • 5.0
    April 27, 2020
    Dr. Obeid is excellent!!!
  • 5.0
    April 24, 2020
    my experience at Fox Chase was a good one. Dr. obeid was wonderful! He answered my questions fully, thoughtfully, and made sure that I understood his explanations. he explained his findings thoroughly so that I understood. He was kind and patient and did not rush our appointment in any way. I would definitely come to see Dr. Obeid again!

Connect with Fox Chase