Choosing a pediatrician

I am currently 32 weeks and want to pre-register at the hospital I’m going to deliver at. In the form they want me to name the pediatrician I want. I found a doctor I like and she should take my insurance (I’m going to call soon to confirm), do I have to notify her in some way that I want her to be my babies doctor? I’ve read they will contact the doctor when I go into labor but before that do I need to do something?