About Me

Dr. Abbass graduated with his Bachelor of Science in Biology in 1998 from the University of Beirut, Lebanon.  He pursued his education in Lebanon and graduated with his Medical Doctorate in 2010.  He then traveled to the United States and completed an additional residency at Henry Ford Hospital in Detroit, Michigan during 2010-2015. He remained Senior Staff Surgeon at Henry Ford Health Systems from 2015-2018.

He is board certified by the American Board of Surgeons, the American Society of Transplant Surgeons for Liver and Kidney Transplantation, and a Fellow of the American College of Surgeons.  He maintains his certifications in Advance Trauma Life Support, Advanced Trauma Operative Management, and Advanced Cardiac Life Support.  He is currently expanding his practice in Southern California with complex liver/gallbladder/pancreatic surgeries.

Dr. Abbass current areas of expertise include many general surgery cases, such as hernias, gallbladders, diseases of the bowel, laparoscopic and robotic procedures, major abdominal procedures, complex liver, pancreas, and gallbladder cancers, and surgical/trauma critical care.  He is well received by his patients and peers with his energetic and responsive attitude towards surgical intervention.

Certified as a master of robotic surgery by the Surgical Review Corporation, Dr. Abbass is equally passionate about hepatobiliary surgery and robotic surgery. He has performed more than 1,600 robotic cases since January 2016 and more than 60 robotic Whipple surgeries since January 2021. Dr. Abbass serves as an official proctor of basic and advanced robotic surgeries for Intuitive Surgical®, as well as an official case observation host. He is one of three surgeons in the United States to be an official instructor of robotic hepatobiliary surgery for Intuitive Surgical® and provides their only step-by-step robotic Whipple video. In addition to hepatobiliary surgery, he performs a wide variety of general and colorectal surgical procedures with special interest in abdominal wall reconstruction.



Provider Specialty

General Surgery

Areas of Care

  • Robotic-Assisted Whipple Procedure
  • Whipple Procedure


OC Surgeons/Saddleback Valley Surgery Division

27799 Medical Center Road Suite 440

Mission Viejo, CA

Office: (949) 364-1007

Appointment: (844) 959-4673