Dr. Sergey Lyass, as a Board certified in General Surgery professional, is specialized in performing a wide range of surgeries, with a special interest in the procedures concerning the abdomen and related organs and structures. Dr. Lyass is trained to practice Bariatric Surgery and minimally-invasive surgical techniques, contributing to the reduction of patient’s recovery time and stress. Dr. Lyass is a member of multiple honorable professional organizations such as the Society of the American Gastrointestinal Endoscopic Surgeons (SAGES), the American Society of Metabolic and Bariatric Surgery (ASMBS) and the American College of Surgeons. He has authored more than 100 papers in peer reviewed journals and presentations on Bariatric and Laparoscopic Surgery. Dr. Lyass is specialized in performing Laparoscopic Gastric Banding, Laparoscopic Sleeve Gastrectomy, Laparoscopic Gastric Bypass, and Revisional Surgery for previously failed weight loss procedures.
Insurance Accepted
- Aetna
- Blue Cross / Blue Shield
- Cigna
- Coventry Health Care
- HealthNet
- Humana
- United Healthcare
- WellPoint
Languages Spoken
- English
- Hebrew
- Russian
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
Honors & Awards
Memberships & Affiliations
American College of Surgeons
American Society of Metabolic and Bariatric Surgeons
Society of American Gastrointestinal and Endoscopic Surgeons
Publications & Media
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Obesity Does Not Affect Mortality after Trauma.
The American Surgeon
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Laparoscopic Transcystic Duct Common Bile Duct Exploration.
Surgical Endoscopy
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Leveling the Learning Curve for Laparoscopic Bariatric Surgery.
Surgical Endoscopy
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Device-Related Reoperations after Laparoscopic Adjustable Gastric Banding.
The American Surgeon
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Portal Vein Thrombosis following Splenectomy: Identification of Risk Factors.
Fujita, F., Lyass, S., Otsuka, K., Giordano, L., Rosenbaum, D. L., Khalili, T. M., Phillips, E. H.
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Current Status of an Antireflux Procedure in Laparoscopic Heller Myotomy.
Lyass, S., Thoman, D., Steiner, J. P., Phillips, E.; Surg Endosc. 2003 Apr 01.
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Follow-up Imaging Studies of Blunt Splenic Injury: Do They Influence Management?
Lyass, S., Sela, T., Lebensart, P. D., Muggia-Sullam, M.; Isr Med Assoc J. 2001 Oct 01.
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Combined Colon and Hepatic Resection for Synchronous Colorectal Liver Metastases.
Lyass, S., Zamir, G., Matot, I., Goitein, D., Eid, A., Jurim, O.; J Surg Oncol. 2001 Sep 01.
