I got approved by my insurance for surgery March 27. My only concern is my pre-op appointment. Do they weigh you and what happens if you gained weight?

Surgeons must comply with the insurance companies rules, regs and requirements. If they require you to be at a certain weight prior to surgery or if the surgeon requires it ,then they will postpone your surgery until the requirements are met. I had wls, due to diabetes not weight ,therefore losing weight wasn't a requirement.