In the United States, general practitioners or family medicine physicians are required to complete a comprehensive residency training program after obtaining ECFMG certification if they are international medical graduates. This residency typically lasts three years and provides in-depth training in primary care, including outpatient and inpatient care, preventive medicine, and management of chronic illnesses. The duration ensures that physicians acquire the necessary clinical skills, medical knowledge, and professional competencies to provide high-quality primary care services. Upon successful completion of this residency, physicians are eligible to obtain board certification and practice independently as family medicine doctors across the United States.