Can I lose weight if I am only 40 BMI?

I'm so used to being on a diet that it's weird not trying to lose weight. I am actually getting pretty sick of "normal" eating and would love to cut back. I have my surgical consults next week. Is it okay after that or do I need to wait for my surgery date to be set?

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.