The purpose of the AMF program is to expand the number of fellows at accredited addiction medicine and addiction psychiatry fellowship programs trained as addiction medicine specialists. These fellows will practice in medically underserved, community-based settings that integrate primary care with mental health disorder and substance use disorder (SUD) prevention and treatment services. The fellowship must include training in prevention and treatment services in medically underserved community-based settings, including in rural areas, that have limited or no access to SUD prevention or treatment. The AMF program trains both addiction medicine and addiction psychiatry fellows.