some states will require insurers to specifically pay for bariatric surgery but that will vary across the country. you'll need to check the plans you're considering buying very carefully to see if the services you need are specifically covered. beyond that it's important to keep in mind that whether surgeries and other treatments are covered are determined by their medical necessity. with regard to limitations you cannot be turned away because you're obese and you cannot be charged more for your health plan either.
what about bariatric surgery under the affordable care act? . obesity is a pre-existing condition but what are going to be the limitations for obese people when they buy insurance on the marketplace?