In 8 years, he has completed over 4,000 procedures in the past 8 years. He performs several types of bariatric surgery procedures, including the Roux-en-Y Gastric Bypass (RNYGB), Laparoscopic Adjustable Gastric Banding (LAGB), Sleeve Gastrectomy, ROSE Procedure, and Vertical Banded Gastroplasty (VBG). Dr. Bertha specializes in performing bariatric procedures laparoscopically, averaging 8 to 10 procedures per week.