Atqui there was a book by a nurse recently, who wrote about joining OA after she realised that she needed help as much as the people she was counselling for problems with eating, and how much it helped her. I will see whether I can find it.
As I understand the basis of anonymity in the 12 Step groups it has much to do with having a "safe place" in which to get better, rather than secrecy. There is a subtle difference.
I'm currently reading a book by Dr Laura Thomas, nutritionist on "intuitive eating" Just Eat It: How to Get Your Shit Together Around Food. She takes an interesting approach.