Body Mass Index Back BMI - Body mass index is a calculation using your height and weight. It is a universally used measurement which is required for insurance verification of the diagnosis of morbid obesity. Please enter your height and weight into the calculator below in order to determine your BMI. A BMI of 40 or above indicates morbid obesity. Height: Ft. In. Weight: lbs. Body Mass Index A BMI of 35 - 40 can qualify an individual for bariatric surgery providing that the individual has health problems directly caused by or made worse by their obesity. The following co-morbidities or health problems can be attributed to obesity: Type 2 Diabetes High blood pressure/Heart disease Osteoarthritis of weight-bearing joints Sleep apnea/Respiratory problems Gastroesophageal reflux/Heartburn Depression Infertility Urinary stress incontinence Menstrual irregularities Skin infections/ breakdowns