Medically reviewed by: Physiotherapist at First Response Healthcare A pediatrician is a doctor who has gained specialized education in treating newborns, infants and children below the age of 18 years. Pediatricians are thorough with the different development stages that children go through and they are well versed with the various medical concerns that might arise at each stage. Pediatricians can help with diagnosis of medical conditions in children and can help with initial health related challenges that you might face with your newborn baby. Newborn pediatricians can help with a diverse range of health-related services that cover health and wellness screenings of your child, as well as management of complex medical conditions.