The main differences are in duration of education and levels of responsibility. A pediatric nurse completes a bachelor's degree in nursing (usually 4 years), must pass a National licensure exam and then can work as a nurse. A pediatrician is a medical doctor (MD) who specializes in pediatrics. The pediatrician must complete college (4 years), then graduate from medical school (4 more years), then complete an internship (2-3 more years) before the pediatrician can begin to practice. In responsibility, the nurse will deliver nursing care which would be helping with activities of daily living (bathing, hygiene), physical assessments of the patient, giving medications that are prescribed by a health care provider (MD, CRNP or PA), report any changes in the patient status to the provider and provide health teaching. The pediatrician, as an MD, will perform physical examinations, order lab tests and medication, diagnose and treat illness, perform medical procedures and provide health teaching to a lesser degree. Essentially, the pediatrician is autonomous whereas the nurse can provide nursing care but can only deliver medications and perform some procedures if these are ordered by a health care provider. Hope that helps!