I'm on Medicaid as well. My insurance required 3 months of pre op weigh ins. I had to meet the nutritionist 3x, chest X-ray, gall bladder u/s, ekg, upper GI and a stress test...and of course blood work. I wasn't required to lose any weight. Just because insurance doesn't require weight loss or weigh ins doesn't mean certain surgeons won't. My friend has the same insurance as me but went through a different surgeon who required weight loss and 6 months of pre op diet. So it depends. They will let you know all that's required