Dr. Gilberto Ungson


Dr Ungson is a member of the Mexicali Bariatric Center medical staff.  20 years of experience in Bariatric Surgery with over 5000 procedures performed.

He is a board-certified general surgeon with Fellowship training in Digestive Surgery, Advanced Laparoscopy since 1991, and Bariatric Surgery since 1997.
A pioneer in the field of minimally invasive surgery in the state of Sonora, performing the first laparoscopic surgical procedures for diseases of the digestive system and abdominal wall.
As the first surgeon in the country to perform Duodenal Switch and Biliopancreatic Diversion procedures for weight loss, he is recognized as the leading national expert in this field.
Expert in laparoscopic Bariatric Surgery since 1997 and performing every surgical technique for weight loss since 2003, he is one of the leading surgeons in Mexico and Latin America.

He has performed more than 5000 bariatric surgical procedures,  1000 them being Revisions of previously failed operations. Over 10,000 laparoscopic surgical procedures.

• Professor in many courses and professional meetings both nationally and internationally since 1993.


• IMSS Hermosillo, Cd. Obregon and Guadalajara 1979-1985.
• Certified by the Mexican Board of General Surgery.


IMSS C.M.O. Guadalajara, Mexico.
• Training in Endoscopy of the Superior Digestive Tract, INCAN, Mexico City 1994.
• Advanced Laparoscopy fellowship training in various countries with distinguished professors.
• Bariatric Surgery training and CME in various countries and Centers of Excellence.


• Professor of Bariatric and Laparoscopic surgery.
• Director of the Obesity Surgery and Diabetes Clinic at CIMA Hospital Hermosillo, Sonora, Mexico.
• Former president of the Mexican College of Bariatric and Metabolic Surgery.
• Member of the surgical staff of CIMA Hospital Hermosillo, Sonora, Mexico.

– Head of the Department  of Health   for the estate of Sonora


• International Federation for the Surgery of Obesity (IFSO).
• Mexican College of Surgeons (AMCG).
• Mexican Society of Endoscopic Surgery (AMCE).