Healthnet Advantage Platinum

OK, so the Insurance person thinks I should do a 3 month diet thingy with the Nutritionist before submitting paperwork. I am OK with that. I just don't want to get my hopes up and then submit the paperwork to the insurance company and get denied. How likely is Healthnet to approve someone with 3months of documented dieting? I guess it all depends on how the insurance person words everything and how its presented to the insurance company.. But I so want this to happen, and reading people's stories keeps me hopeful...