How do I change my Dr on my profile?

Sorry but this might be a stupid question. I'm in the process of getting approved for WLS but it looks like another Dr will operate than the original Dr. I saw. I can't figure out how to change the Dr on my profile. Help please!

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.