Setting up pediatrician through Tricare

Valorie
I have a question for the mom's out there.... 
So forgive me if I seem a bit naive asking this question. I'm currently 7 months pregnant with our first baby. My husband has Tricare prime and I have standard. How do we go about finding our baby a pediatrician? Will our baby automatically have Tricare prime? Will he just be assigned a doctor. Sorry I'm so clueless.