Weight Loss Surgery in Mexico at Mexicali Bariatric Center (MBC). We welcome Dr. Ungson & Dr. Wilhelmy to our team of bariatric surgeons. The most experienced bariatric team in Mexico.

MBC’s newest additions to the surgical team include two experienced certified bariatric surgeons.  Both    surgeons worked with Dr. Alberto Aceves in the past  and as head surgeons they now work along side Dr. Aceves’ long time assistant surgeon, Dr. David Beltran.  The MBC team continues to deliver  the life changing  long term results patients  have come to expect  from the center with over 10 years in existence providing only the best of care..

Pioneer in duodenal switch surgery , Dr. Gilberto Ungson, is the the most experienced duodenal switch surgeon in Mexico, with over 450 duodenal switch surgeries performed  Dr. Ungson is the number choice for Duodenal Switch Surgery offering safety and an effective technique to ensure long term success.  Dr Ungson has experience in Gastric Bypass, Sadi-S, wide range or revisión surgeries , Lap band and  Gastric Sleeve.

Dr. Rodolfo Wilhelmy, certified bariatric surgeon and  long term member of the American College of Surgeons  is one of the leading bariatric surgeons in Mexico with over 18 years of experience and thousands  of weight loss procedures performed.

Dr. David Beltran, bariatric surgeon was Dr. Alberto Aceves assistant surgeon for over 4 years and has collaborated in thousands  of bariatric procedures and not only has inherited Dr. Aceves’  world known and sought after technique but also his visión and compassion.

Mexicali Bariatric Center  is the most complete bariatric surgical center in Mexico offering all proven weight loss procedures.  Results  are consistently  better than the industries averages  never losing focus on safety . With these 2 new highly experienced surgeons MBC continues with their  long time commitment of providing quality medical care in Mexico .

Dr. Gilberto Ungson Credentials

Director of the Obesity Surgery and Diabetes Clinic and head of the surgical staff. He is a board-certified general surgeon with Fellowship training in Digestive Surgery, Advanced Laparoscopy since 1991, and Bariatric Surgery since 1997.
arrow 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.
arrow 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.
arrow 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.
arrow He is one of the leading surgeons in Mexico and Latin America.
arrow He has performed more than 1,500 bariatric surgical procedures, 200 of them being Revisions of previously failed operations.
arrow More than 7000 laparoscopic surgical procedures.
arrow Professor in many courses and professional meetings both nationally and internationally since 1993.

General Surgery Residency training

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

Digestive Surgery Fellowship training

  • 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

Professional Honors

  • 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


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


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