(Philadelphia, PA) - Mary Ann E. Keenan, MD, has joined the University of Pennsylvania School of Medicine as a Professor in the Department of Orthopaedic Surgery. Dr. Keenan is also Chief of Penn's Neuro-Orthopaedic Service program.

Dr. Keenan's clinical interests address reconstructive neuro-orthopaedic surgery for persons with neurologic disorders such as brain injury, stroke, spinal cord injury and post-polio syndrome. To support her research, she has received grant support from the Orthopaedic Research and Education Foundation Grant, the Albert Einstein Society Grant, and the U.S. Army Medical Research Acquisition Activity Command, among others.

Dr. Keenan received her medical degree from The Medical College of Pennsylvania and went on to complete an internship and residency with Albert Einstein Medical Center in Philadelphia. She completed fellowships in Arthritis/Joint Replacement and Neuro-Orthopaedics and Problem Fractures with the Rancho Los Amigos National Rehabilitation Center in California. Prior to her appointment at Penn, Dr. Keenan was Chair of the Department of Orthopaedic Surgery at Albert Einstein Medical Center, making her the first woman to chair an academic department of orthopaedic surgery in the country. She also held Visiting Professorships in several locations including Switzerland, Germany, Philippines, Italy, Tennessee and Texas.

She received the 1994 Commonwealth Board Award from the Medical College of Pennsylvania for the most outstanding physician practicing in Pennsylvania. She is a Fellow of the American Academy of Orthopaedic Surgeons and the American Medical Association, as well as a member of many professional organizations including the American Orthopaedic Association and the Academic Orthopaedic Society. Her research has been published in peer-reviewed journals and textbooks and she has been invited to lecture nationally and internationally.


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Penn Medicine is one of the world’s leading academic medical centers, dedicated to the related missions of medical education, biomedical research, excellence in patient care, and community service. The organization consists of the University of Pennsylvania Health System and Penn’s Raymond and Ruth Perelman School of Medicine, founded in 1765 as the nation’s first medical school.

The Perelman School of Medicine is consistently among the nation's top recipients of funding from the National Institutes of Health, with $550 million awarded in the 2022 fiscal year. Home to a proud history of “firsts” in medicine, Penn Medicine teams have pioneered discoveries and innovations that have shaped modern medicine, including recent breakthroughs such as CAR T cell therapy for cancer and the mRNA technology used in COVID-19 vaccines.

The University of Pennsylvania Health System’s patient care facilities stretch from the Susquehanna River in Pennsylvania to the New Jersey shore. These include the Hospital of the University of Pennsylvania, Penn Presbyterian Medical Center, Chester County Hospital, Lancaster General Health, Penn Medicine Princeton Health, and Pennsylvania Hospital—the nation’s first hospital, founded in 1751. Additional facilities and enterprises include Good Shepherd Penn Partners, Penn Medicine at Home, Lancaster Behavioral Health Hospital, and Princeton House Behavioral Health, among others.

Penn Medicine is an $11.1 billion enterprise powered by more than 49,000 talented faculty and staff.

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