|American School of Osteopathy (1892-1922)|
A.T. Still College of Osteopathy and Surgery (1922-1924)
|Endowment||US $53.6 million  (2006)|
|President||Craig M. Phelps, DO|
|167 full time, 481 part time |
|Students||3,293  |
|Location||Kirksville, Missouri, USA|
|Colors||Blue and Aqua|
A.T. Still University of Health Sciences (ATSU) is a non-profit, private, graduate school focusing on health sciences, as well as the world's first osteopathic medical school.  Founded in 1892 by Dr. Andrew Taylor Still,  the school is based in Kirksville, Missouri, United States, with a second campus in Arizona. ATSU is accredited by the Higher Learning Commission of the North Central Association of Colleges and Schools.
ATSU includes two campuses on 200 acres with six schools that offer programs in osteopathic medicine, dentistry, and health management:
- Kirksville College of Osteopathic Medicine
- Arizona School of Health Sciences
- College of Graduate Health Sciences
- Arizona School of Dentistry and Oral Health
- School of Osteopathic Medicine in Arizona
- Missouri School of Dentistry and Oral Health
The A.T. Still University Kirksville College of Osteopathic Medicine (ATSU-KCOM) was the first osteopathic medical school in the world, founded in 1892 in Kirksville, Missouri. It was originally named American School of Osteopathy. ATSU-KCOM is accredited by the Higher Learning Commission, a commission of the North Central Association of Colleges and Schools (NCA). 
The Arizona School of Health Sciences was established by ATSU in 1995.
A second ATSU campus opened in 2006, the A.T. Still University School of Osteopathic Medicine in Arizona (ATSU-SOMA), located in Mesa, Arizona. It educates osteopathy medical students under a relatively new medical educational model, which links osteopathic training to community health centers in the U.S.. 
A partnership exists between ATSU and the National Association of Community Health Centers.  The ATSU-ASDOH implemented a model integrating state of the art training with patient care needs in Community Health Centers (CHCs). ATSU-SOMA works in partnership with eleven sites to integrate medical education with preparation for the most complex healthcare careers.  A hometown program exists to offer an opportunity for medical students previously connected to CHCs to gain admission. 
The Center of Advanced Oral Health, at A.T. Still University in Arizona School of Dentistry and Oral Health, opened in 2014 in Mesa. It provides dentistry for those with advanced oral health needs, and developed in response to the complex needs of patients in underserved communities. 
ATSU includes two campuses with six schools:
- Kirksville College of Osteopathic Medicine, founded in 1892, Missouri campus
- Arizona School of Health Sciences, established in 1995
- College of Graduate Health Sciences (ATSU-CGHS), established in 1999, Missouri campus
- Arizona School of Dentistry and Oral Health (ATSU-ASDOH), established in 2003
- School of Osteopathic Medicine in Arizona (ATSU-SOMA), established in 2006
- Missouri School of Dentistry and Oral Health (ATSU-MOSDOH), established in 2013, Missouri campus
- ATSU-ASDOH clinic opened in 2005. 
With providing the world's first osteopathic principles to medicine, ATSU states:
"A.T. Still University of Health Sciences serves as a learning-centered university dedicated to preparing highly competent professionals through innovative academic programs with a commitment to continue its osteopathic heritage and focus on whole person healthcare, scholarship, community health, interprofessional education, diversity, and underserved populations." 
ATSU occupies two campuses (Kirksville, Mo., and Mesa, Ariz.) on more than 200 acres with six schools offering programs in osteopathic medicine, dentistry, health sciences, and health management. 
ATSU's main campus is located on 150 acres in Kirksville, Missouri. Kirksville's population is more than 17,000 and is approximately 180 miles to Kansas City and 214 miles to St. Louis.
- Kirksville College of Osteopathic Medicine - ATSU-KCOM trains osteopathic physicians and grants the Doctor of Osteopathic Medicine (DO) degree. ATSU-KCOM offers a two-year master's degree in biomedical sciences for students interested in health science careers in medicine, education, or research. ATSU-KCOM's DO curriculum includes four years of study.  The first two years focus on the basic and clinical sciences including osteopathic theory and methods, in an academic setting at the Missouri campus. The third- and fourth-year clinical rotation experience is completed at sites in one of the rotation regions. These regions include Arizona, Illinois, Michigan, Missouri, New Jersey, Ohio, Pennsylvania, and Utah. The campus features a human patient simulation lab, study rooms for standardized patient encounters, classrooms, and labs. It also houses the Gutensohn Clinic, the Museum of Osteopathic Medicine, the A.T. Still Memorial Library, the Northeast Missouri Area Health Education Center, and the A.T. Still Research Institute. 
- The College of Graduate Health Studies - ATSU-CGHS was founded in 1999 on the Kirksville Campus. The College trains individuals in health administration, health education, health sciences, kinesiology and public health.
- Missouri School of Dentistry and Oral Health - ATSU-MOSDOH offers the Doctor of Dental Medicine (DMD) degree. Students spend their first two years studying on the Missouri campus. Third- and fourth-year clinical education is based in St. Louis, with at least half of the fourth-year clinical experiences distributed in CHCs and other safety net clinics in Missouri and the Midwest.
A.T. Still University School of Osteopathic Medicine in Arizona, located in the city of Mesa, was established in the 1990s and is located on a 59-acre campus approximately 25 miles from Phoenix.
- Arizona School of Health Sciences - ATSU-ASHS was founded in 1995, and was the first school to occupy ATSU's second campus in Mesa, Arizona. The School offers a variety of allied health programs including athletic training, audiology, health sciences, human movement, occupational therapy, physical therapy, and physician assistant studies.
- Arizona School of Dentistry and Oral Health - ATSU-ASDOH, Arizona's first dental school, was added to the Arizona campus in 2003. The School offers a Doctor of Dental Medicine (DMD) degree and certificate in orthodontics.
- School of Osteopathic Medicine in Arizona - ATSU-SOMA exclusively trains osteopathic physicians and offers the Doctor of Osteopathic Medicine degree. ATSU-SOMA operates in a portion of an existing 100,000-square-foot (9,300 m2) building on the 22-acre (8.9 ha) campus of ATSU in Mesa, Ariz. The campus is the anchor of the Arizona Health and Technology Park, a 132-acre (53.4 ha) education, healthcare, and technology triangle owned by ATSU and Vanguard Health Systems. The master plan for the new park includes hospitals, long-term care facilities, professional offices, and product development research facilities. 
- The Center of Advanced Oral Health at A.T. Still University's Arizona School of Dentistry & Oral Health in Mesa, Arizona provides special care dentistry for low-income patients. 
ATSU currently has 30 graduate and post-professional programs among its schools.
ATSU has an average annual enrollment of more than 3,100 students from 35 countries.  The University also has approximately 40 student organizations, and students to faculty is an 11:1 ratio.  The Still-Well Student Wellness Program is designed to encourage students' health and wellness.
ATSU has more than 200 full-time faculty.
- Jenette H. Bolles, first woman to have a career as an osteopath and first woman faculty member at ASO 
- Renee Dufault, DHED, Biologist and whistleblower
- Craig Phelps, DO, previous provost and current president of A.T. Still University, and primary care team physician of the NBA Phoenix Suns.
- Frederick Smith, DO, a Republican member of the U.S. House of Representatives for Ohio.
- Suzanne Steinbaum DO, cardiologist, author, and national spokesperson for the American Heart Association.
- S. S. Still, founder of Des Moines University, and nephew of Andrew Taylor Still.
- William Sutherland, DO
- Stephen Ward, DO
- List of dental schools in the United States
- List of medical schools in the United States
- Osteopathic medicine in the United States
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