Excerpt from Statistical Manual for the Use of Institutions for the Insane
The American Medico  Psychological Association at its meeting held in New York, in May 1917, adopted the report of its Committee on Statistics which provided for a system of uniform statistics in institutions for mental diseases, and appointed a standing Committee on Statistics to promote the introduction of the system throughout the country. This committee met in New York City on February 7, 1918, and in cooperation with the National Committee for Mental Hygiene outlined a plan of procedure.
APA is an organization of psychiatrists working together to ensure humane care and effective treatment for all persons with mental illness, including substance use disorders.