Some have their nurses answer the calls in consultation with the doctor. There are probably as many ways phone calls are handled as there are doctors, so be sure you are comfortable with it. This can be one of the most frustrating aspects of going to the doctor. Ask the doctor or nurse directly. I would also ask the parents who go to that office.
Some offices require some payment with each visit.
Others will bill you. Much of the cost is dependent upon the type of insurance you have, but you should inquire about how this is handled. To become board certified, a doctor must have completed four years of medical school, three years of pediatric specialty training and passed the board exam given by the American Academy of Pediatrics. The exam is taken every seven years for recertification. It would be optimal for the physician to have privileges where you will be delivering so she can see your infant from the very beginning.