They cannot give out any information without you signing the HIPPA consent forms now.
Look at it this way. Lets say you get sick, and they have to do genetic tests to find out what they need to know. These test show you have a 40% increased risk of a stroke or something.
This insurance company reads these genetic results, and eventually, drops your coverage. Now you can't get insurance at all because the first company flagged you (there may be no reason for the red flag, just a flag) After that, you go to get a new job, and the insurer of the hiring company tells them not to hire you, you are a risk. You don't know why you didn't get the job, you just didn't get it. (After all, employers want to keep their healthcare costs low, why wouldn't they get in bed with their insurers?)
Or better yet, you see a crazy doctor a few times, and can never find gainful employment again. You are too much of a risk. Information is power, and we give away our information like we never owned it to begin with.