Pediatrician/ˌpiːdiəˈtrɪʃn/ Definition 1 of 1Pro Tip 1/3Age Specific Pediatricians focus on patients from birth to young adulthood. The pediatrician followed her patient's progress since birth. Pro Tip 2/3Not General Practice Unlike general practitioners, pediatricians concentrate on children's health issues. For adult health concerns, you do not visit a pediatrician. Pro Tip 3/3Routine Care Pediatricians often handle routine check-ups and vaccinations for children. Schedule your baby's next vaccination with the pediatrician.