At your height of 5'5" and weight of 180 pounds, your BMI (body mass index) is 30.0 kg/m^2. this is too low to qualify for bariatric surgery. Bariatric surgery guidelines, for surgeries like gastric bypass, sleeve gastrectomy, gastric band, biliopancreatic diversion, the minimum BMI is 35-40 if there are co-exisiting medical problems, such as heart disease, sleep apnea, hypertension, high cholesterol, diabetes. If the BMI is over 40, then most insurance policies would not require a co-existing medical problem.
A new option for your BMI is the intra-gastric balloon. There are two brands of this balloon, Orbera and ReShape. Basically it is a balloon that is fluid filled and remains in your stomach for a period of about 6 months, and then is deflated and removed. It is recently FDA approved but not covered by insurance.