Sergey Lyass, M.D., FACS

Sergey Lyass, M.D., FACS



Dr. Sergey Lyass is board-certified in General Surgery, specializing in performing a wide range of procedures with a keen interest in the surgeries concerning the abdomen and the related organs and structures. He is trained to practice Bariatric Surgery by using minimally-invasive techniques, contributing to the reduction of patient's recovery time and stress. The surgeon is a member of multiple honorable professional organizations, such as the Society of the American Gastrointestinal Endoscopic Surgeons, the American Society of Metabolic and Bariatric Surgery, and the American College of Surgeons. Dr. Sergey Lyass has authored over 100 papers in peer-reviewed journals and has given presentations on bariatric and laparoscopic surgery. Dr. Sergey Lyass is also a da Vinci robotic surgery provider, serving mostly patients in Los Angeles, Glendale, and Marina del Rey, California.

He earned his medical degree from Moscow Medical University in 1985. He was trained in General Surgery in Israel at the Hebrew University-Hadassah Medical Center in Jerusalem and completed his internship at Mount Sinai Medical Center in New York City. Dr. Sergey Lyass underwent both his surgical residency and his fellowship in minimally-invasive and bariatric surgery at Cedars-Sinai Medical Center. He has approximately 30 years of professional experience and before practicing in California, he had a medical license for Iowa and Florida. In addition to practicing medicine in California, the surgeon can also practice in Nevada at the moment.

Procedures Dr. Sergey Lyass Performs at Cedars-Sinai Marina del Rey Hospital

Insurance Accepted

  • Aetna
  • Blue Cross / Blue Shield
  • Cigna
  • Coventry Health Care
  • HealthNet
  • Humana
  • United Healthcare
  • WellPoint

Languages Spoken

  • English
  • Hebrew
  • Russian
  • Spanish

Education & Training

Medical Degree

Moscow II State Medical School

Internship(s)

Institute of Cardio-Vascular Surgery n.a. Bakulev, Moscow

Mount Sinai Medical Center

Residency(ies)

Hebrew University-Hadassah Medical Center in Jerusalem, Israel - General Surgery

Mount Sinai School of Medicine - General Surgery

Fellowship(s)

Cedars-Sinai Medical Center, Los Angeles - Minimally Invasive and Bariatric Surgery



Memberships & Affiliations

  • American College of Surgeons American College of Surgeons
  • American Society of Metabolic and Bariatric Surgery American Society of Metabolic and Bariatric Surgery
  • Society of American Gastrointestinal and Endoscopic Surgeons Society of American Gastrointestinal and Endoscopic Surgeons
  • Publications & Media