The American Osteopathic Association is the representative member organization for the more than 145,000 osteopathic medical doctors and osteopathic medical students in the United States. The AOA is headquartered in Chicago, Illinois, and is involved in post-graduate training for osteopathic physicians. Beginning in 2015, it began accrediting post-graduate education as a committee within ACGME, creating a unified accreditation system for all DOs and MDs in the United States. The organization promotes public health, encourages academic scientific research, serves as the primary certifying body for D.O.s overseeing 18 certifying boards, and is the accrediting agency for osteopathic medical schools through its Commission on Osteopathic College Accreditation.
As of October 2015, the AOA no longer owns the Healthcare Facilities Accreditation Program, which accredited hospitals and other health care facilities.
The AOA has held yearly conventions since its founding in 1897. The AOA also manages DOCARE International, a non-profit charitable organization. The AOA also publishes The DO, an online publication, and The Journal of the American Osteopathic Association, a peer reviewed medical journal.