Based on a quick google search, it looks like Pediatrician salary is determined by how specialized your field is. Here's a useful quote from mommd (a website for women in medicine):
As with any medical career, a major determinant of salary is the level of specialization. While the average salary for pediatricians is around $175,000, that of pediatric specialists is typically higher. Pediatricians with at least 3 years experience who are specialized in neurology or oncology/hematology can typically earn up to $250,000, while pediatric surgeons typically earn $400,000-$500,000 a year.
Here is a link to the more complete entry, including median salaries for various specialities: http://www.mommd.com/pediatric-salary.shtml