A tummy tuck operation CAN be done with a BMI of 37, however, people with a BMI greater than 30 have an increased risk of complications and a decreased sense of satisfaction with the results. It would be safer for you, and your end result would be better, if you began a daily regiment of diet and exercise to reduce your weight down so your BMI is 30 or less. If you are going to have an elective procedure, be responsible for the cost of it and take time from work to recover from it, you should do everything to be sure it goes perfectly smoothly and you are very pleased with the results. Having a BMI of 30 or less will go a long ways toward helping you achieve that goal. Best wishes.