If you have problems performing daily activities you may be a candidate for gastrointestinal surgery. Usually, being overweight may cause problems with doing routine everyday activities. When there are no complications, the most common form of weight loss surgery, the post op surgery, can cost from $25,000 to $35,000, or more. Before you conclude that a gastric bypass procedure is the best way for you to begin losing weight, you have to keep in mind the good and the not so good sides of it. bypass surgery is normally resorted to as a last measure when an all other conventional weight loss methods have failed. If your insurance covers gastric bypass, your out-of-pocket costs will be significantly reduced, and should be limited to your deductible and co pays. Coverage for operations related to laparoscopic surgery is limited, at best. The cost of stomach surgery can vary widely, depending on the type of surgery performed and whether or not your insurance will help pay for it. After lap surgery, the burden on the bones, joints and vascular system is decreased. General health is greatly increased. alternatives to bariatric surgery is normally resorted to as a last measure when an all other conventional weight loss methods have failed.