Primary care doctors such as family practitioners, internists, pediatricians, gynecologists, and nurse practitioners undertake the medical care of patients. Their duties include treating patients by examining their medical history and symptoms, diagnosing health problems, and providing general health information and recommendations to help educate patients. To perform these duties effectively, primary care doctors must have good medical education and certifications in their respective fields so they are skilled at diagnosing issues and caring for patients' overall health needs.