Bariatric surgery is not suitable or concerned for everyone who is overweight. You may need to meet certain medical guidelines to qualify for surgery to lose weight. You will probably have an extensive testing program to see if you qualify. You should also be willing to make permanent changes in order to live a healthier life. You may be required to participate in long-term follow-up programs that include monitoring your diet, lifestyle and behavior, and medical conditions.  Commonly, bariatric surgery may be an possibility for you if: 1 . Your body mass index (BMI) is 40 or higher (obesity). 2 . IF your BMI is 35 to 39.9 (obesity), and you have a serious weight-related health issue, such as type 2 diabetes, high blood pressure, or severe sleep apnea. In some possibilities, you may be eligible for certain types of weight loss surgery if your BMI is 30 to 34 and you have serious weight-related health issues.