Hazem Shamseddeen, M.D.

Health Sciences Clinical Professor

To see if Hazem Shamseddeen is accepting new patients, or for assistance finding a UC Davis doctor, please call 800-2-UCDAVIS (800-282-3284).



Surgery - General

Surgery - Gastrointestinal

Surgery - Foregut & Metabolic

Surgery - Robotic

Robotic Surgery



Locations and Contact

UC Davis Medical Center - Cypress Building

UC Davis Medical Center - Cypress Building
2221 Stockton Blvd.
Sacramento, CA 95817

Get Directions

Phone: 800-2-UCDAVIS

Additional Numbers

Clinic Fax


Physician Referrals

800-4-UCDAVIS (800-482-3284)

Clinical Interests

Dr. Shamseddeen's clicnical interests are key advanced laparoscopic skills: bariatric procedures/revisions, colon resections, inguinal/ventral hernia, complex foregut and bariatric surgery experience: RYGB, sleeve gastrectomy, lap band, revisional bariatric cases. He also has interests in complex abdominal wall reconstruction, such as anterior and posterior component separation and performing robotic complex abdominal wall reconstruction.


Foregut, Metabolic and General Surgery

Center/Program Affiliation

Center for Alimentary and Metabolic Science

Medical School

M.D., Beirut Arab University, Beirut, Lebanon 2003


Surgery, American University of Beirut, Beirut, Lebanon 2003-2005


General Surgery, North Shore-LIJ Health System, Long Island NY 2005-2010


MIS/Bariatrics, UC Davis, Sacramento CA 2010-2011

Shamseddeen H, Mostaedi R, Ali J, Ali M. Psychological Predictors of Weight Loss Success Following Roux-En-Y Gastric Bypass. Current Research in Diabetes and Obesity Journal. 2017 Aug 4;3(3):1-5.

Getty JL, Hamdallah IN, Shamseddeen HN, Wu J, Low RK, Craig J, Ali MR. Changes in renal function following Roux-en-Y gastric bypass: a prospective study. Obes Surg. 2012 Jul;22(7):1055-9. doi:10.1007/s11695-012-0617-0. PMID:22318447.

Hamdallah IN, Shamseddeen HN, Getty JL, Smith W, Ali MR. Greater than expected prevalence of pseudotumor cerebri: a prospective study. Surg Obes Relat Dis. 2013 Jan-Feb;9(1):77-82. doi:10.1016/j.soard.2011.11.017. Epub 2011 Dec 10. PMID:22264908.

Shamseddeen H, Getty JZ, Hamdallah IN, Ali MR. Epidemiology and economic impact of obesity and type 2 diabetes. Surg Clin North Am. 2011 Dec;91(6):1163-72, vii. doi:10.1016/j.suc.2011.08.001. Epub 2011 Oct 2. PMID:22054146.

Agaba EA, Shamseddeen H, Gentles CV, Sasthakonar V, Gellman L, Gadaleta D. Laparoscopic vs open gastric bypass in the management of morbid obesity: a 7-year retrospective study of 1,364 patients from a single center. Obes Surg. 2008 Nov;18(11):1359-63. doi:10.1007/s11695-008-9455-5. Epub 2008 Apr 26. PMID:18438621.

Agaba EA, Gentles CV, Shamseddeen H, Sasthakonar V, Kandel A, Gadelata D, Gellman L. Retrospective analysis of abdominal pain in postoperative laparoscopic Roux-en-Y gastric bypass patients: is a simple algorithm the answer? Surg Obes Relat Dis. 2008 Sep-Oct;4(5):587-93. doi:10.1016/j.soard.2007.10.015. Epub 2008 Jan 28. PMID:18226974.

Agaba EA, Shamseddeen H, Sasthakonar V, Sivalingham V, Shah KG, Ravikumar TS, Nadjari H, Denoto G. Fate of retained capsule: a pathognomonic for surgery. Am Surg. 2007 Nov;73(11):1140-3. PMID:18092650.

Gellman L, Charmaine G, Shamseddeen H, Gadelata D. Laparoscopic Gastric Banding Algorithm for Lapband Salvage in Patients with Poor Weight Loss. ASMBS, San Diego. 2007.

Agaba EA, Gentles CV, Shamseddeen H, Gadelata D, Gellman L. A Retrospective Analysis of Abdominal Pain in the Post-Op Laparoscopic Roux-En-Y-Gastric Bypass Patients: Is Simple Algorithm the Answer? ASMBS, San Diego. 2007.

Shamseddeen H, Zelada Getty JL, Hamdallah I, Ali M. Psychological Predictors of Weight Loss Success Following Roux-En-Y Gastric Bypass. ASMBS, Orlando. 2011.