Doctor Payment Schedules

This is my first child. I am due late December. My insurance deductible is $3000. My OB only has a 20 week payment option and wants $480 a month before the baby is born. This doctor is In-Network. So I will be shopping around for another doc. 
My question is for those who have been through this before that also had high deductibles. Do I have any hope of finding a doc that has a longer payment period or will my efforts be futile?  
Thanks for reading :)