"전문의" refers to a specialist doctor in South Korea who has completed advanced training in a specific area of medicine. These doctors focus on particular fields, such as 내과 (internal medicine), 외과 (surgery), or 소아과 (pediatrics), allowing them to provide expert care for complex health issues. To become a "전문의," a physician must first complete medical school and a residency program, followed by additional training in their chosen specialty. This extensive education ensures that they possess the necessary knowledge and skills to diagnose and treat patients effectively in their area of expertise.