The American Psychiatric Association is the main professional organization of psychiatrists and trainee psychiatrists in the United States, and the largest psychiatric organization in the world. Its some 38,800 members are mainly American but some are international. The association publishes various journals and pamphlets, as well as the Diagnostic and Statistical Manual of Mental Disorders. The DSM codifies psychiatric conditions and is used worldwide as a guide for diagnosing disorders.
The organization has its headquarters in Washington, D.C.