Doctor of Osteopathic Medicine (DO or D.O., or in Australia DO USA) is a medical degree conferred by the 38 osteopathic medical schools in the United States. DO and Doctor of Medicine (MD) degrees are equivalent: a DO graduate may become licensed as a physician or surgeon and thus have full medical and surgical practicing rights in all 50 US states. , there were 168,701 osteopathic physicians and medical students in DO programs across the United States. Osteopathic medicine emerged historically from osteopathy, but has become a distinct profession.
more than 28% of all US medical students were DO students. The curricula at DO-granting medical schools are equivalent to those at MD-granting medical schools, which focus the first two years on the biomedical and clinical sciences, then two years on core clinical training in the clinical specialities.
One notable difference between DO and MD training is that DOs spend an additional 300–500 hours to study a set of hands-on manipulation (OMT) of the human musculoskeletal system along with learning conventional evidence-based medicine and surgery like their MD peers.
Upon completing osteopathic medical school, a DO graduate must enter an internship or residency training program, which may be followed by fellowship training. DO graduates attend the same graduate medical education programs as their MD counterparts.
Osteopathy, the older form of osteopathic medicine, began in the United States in 1874. The term "osteopathy" was coined by the physician and surgeon Andrew Taylor Still, who named his new discipline of medicine "osteopathy", reasoning that "the bone, osteon, was the starting point from which [he] was to ascertain the cause of pathological conditions". He founded the American School of Osteopathy (now A.T. Still University of the Health Sciences) in Kirksville, Missouri, for the teaching of osteopathy on May 10, 1892. While the state of Missouri granted the right to award the MD degree, he remained dissatisfied with the limitations of conventional medicine and instead chose to retain the distinction of the DO degree.