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Issac Benjamin Paz,

M.D.

Surgical Oncologist

Biography photo
Location
City of Hope Duarte
1500 East Duarte Road
Duarte, CA 91010
Specialties
Breast Surgical Oncology
Gastroenterology
Surgical Oncology
Education
Medical school:
Board Certifications
  • American Board of Surgery

Degrees
  • 1985, Masters in General Surgery, with honors, Universidad Catolica de Chile

  • 1981, M.D., with honors, Universidad de Chile

Fellowship
  • 1990-1993, Fellow, Surgical oncology, City of Hope, Duarte, CA

Residency
  • 1989-1990, Chief resident, general surgery, University of Arizona, Tucson, AZ

  • 1985-1989, Resident, general surgery, University of Arizona, Tuczon, AZ

  • 1984-1985, Chief resident, general surgery, Universidad Catolica De Chile, Santiago

  • 1982-1984, Resident, general surgery, Universidad Catolica De Chile, Santiago

  • 1980-1981, Rotating intern, Universidad de Chile, Hospital Salvador

  • 1979-1982, Intern, Emergency unit of the Chilean Air Force Hospital

  • 1976-1982, Intern and student clerk, Emergency unit of the Hospital Salvador

Professional Experience
  • 2018-present, Vice Chair, Clinical Affairs, City of Hope, Duarte CA

  • 2014-2018, Medical Director of Value Based Oncology Care, City of Hope Medical Foundation, Duarte, California

  • 2011-present, Clinical Professor, Division of Surgical Oncology, Department of Surgery, City of Hope, Duarte, CA

  • 2009-2011, Executive Medical Director of Community Practice Sites, City of Hope Medical Group, Duarte, CA

  • 2008-2011, Vice Chair, Department of Surgery, City of Hope, Duarte, CA

  • 2005-2008, Acting Chair, Department of Surgery, City of Hope, Duarte, CA

  • 2004-2007, Chief, Division of General Oncologic Surgery, City of Hope, Duarte, CA

  • 2001-2005, Vice Chair, Department of Surgery, City of Hope Duarte, CA

  • 2000-2011, Co-director, Breast Cancer Program, City of Hope, Duarte, CA

  • 2000-2011, Medical Director, City of Hope Women’s Center, Duarte, CA

  • 1998-2004, President, City of Hope Medical Group

  • 1998-2003, Section Head, Division of General Oncologic Surgery, City of Hope, Duarte, CA
    1992-present, Staff surgeon, Department of Surgery, City of Hope, South Pasadena, CA

Academic Appointments
  • Vice Chair, Clinical Affairs
  • Clinical Professor, Division of Surgical Oncology, Department of Surgery
About Me

I. Benjamin Paz, M.D., is a world-class cancer surgeon at City of Hope® Cancer Center Duarte who takes a compassionate, innovative approach to oncology care. Dr. Paz brings warmth and empathy to every patient interaction and believes that the goal of cancer treatment is to help people live full lives and pursue their dreams. 

Dr. Paz is an expert in breast, gastrointestinal and rectal cancers, as well as complex tumors affecting the bones and soft tissues. He has been a pioneer in minimally invasive cancer surgery and his leadership helped establish one of California’s premier centers for minimally invasive surgical oncology. 

Originally from Chile, Dr. Paz earned his medical degree there before continuing his training at the University of Arizona in Tucson. His global perspective and lifelong dedication to healing have shaped his career and his impact on thousands of patients. In addition to his clinical work, Dr. Paz has served as vice chair of the Department of Surgery at City of Hope. He played a key role in expanding surgical programs and launching multidisciplinary clinics designed to offer patients seamless, personalized care. 

Dr. Paz continues to embody the City of Hope mission—offering expertise, compassion, and genuine hope to every person who walks through the door.

Patient ratings
Star ratings and comments are only available for medical, radiation and gynecologic oncologists. Gynecologic surgical offerings are not included at this time due to a different survey tool required to evaluate these services. CTCA uses a validated Press Ganey® survey, which captures patient experience feedback for the primary oncology services of chemotherapy and radiation therapy at our comprehensive care and research centers. Following industry best practice, star ratings and comments are only published for physicians with a minimum of 30 completed patient surveys.