Non Profit@The American Psychiatric Association is an organization of psychiatrists that offers diagnosis services and treatment for persons with mental disorders, including intellectual disabilities and substance use disorders. The society’s Diagnostic and Statistical Manual of Mental Disorders (DSM) is the standard classification of mental disorders used by mental health professionals in the United States, which contains a listing of diagnostic criteria for every psychiatric disorder recognized by the U.S. healthcare system. The American Psychiatric Association was founded in 1844 and is based in Virginia, United States.