Bariatric surgery usually is recommended only for people who have a BMI of 35 or higher and who have tried losing weight using medication or diet and exercise changes without success.

This surgery typically is recommended for those with a BMI of 40 or higher even if they have no obesity-related medical conditions. 

For those with a BMI of 35 to 39.9, bariatric surgery generally is recommended when the person also has one or more obesity-related conditions (or co-morbidity), including Type 2 diabetes, hypertension (high blood pressure), sleep apnea and other respiratory disorders, non-alcoholic fatty liver disease, osteoarthritis, lipid abnormalities, gastrointestinal disorders or heart disease.

Bariatric Providers