Meet Our Shoulder and Elbow Specialists


Jay Keener, MD, Chief of Service
Dr. Keener is board-certified in orthopedic surgery and serves as a Professor in Orthopedic Surgery at Washington University School of Medicine and Chief of the shoulder and elbow service. Also formerly a physical therapist, Dr. Keener specializes in shoulder and elbow arthroscopic surgery and joint replacement and also treats shoulder instability; labral tears and biceps tendon injuries; rotator cuff disease/tears; frozen shoulder; shoulder fractures; shoulder and elbow arthritis; throwing injuries; and acromioclavicular and sternoclavicular joint injuries. He earned his medical degree from West Virginia University School of Medicine. Following a residency in orthopedic surgery at the University of Iowa, Dr. Keener completed a fellowship in shoulder and elbow surgery at Washington University School of Medicine in St. Louis in 2004.

Alexander Aleem, MD, MSc
Dr. Aleem is an Assistant Professor of Orthopaedic Surgery at Washington University School of Medicine. He specializes in the surgical and nonsurgical treatment of rotator cuff tears, shoulder and elbow instability, shoulder and elbow injuries in the throwing athlete, biceps tendon injuries, frozen shoulder and arthritis of the shoulder and elbow. Dr. Aleem received his medical degree at Washington University School of Medicine in St. Louis. He completed a residency in Orthopaedic Surgery at Washington University School of Medicine and Barnes-Jewish Hospital, where he served as an Administrative Chief Resident. Dr. Aleem then went on to complete fellowship training in shoulder and elbow surgery at The Rothman Institute at Thomas Jefferson University. 

Aaron Chamberlain, MD, MSc, MBA

Dr. Chamberlain is an Associate Professor of Orthopaedic Surgery at Washington University School of Medicine. He earned his medical degree from the University of California San Francisco School of Medicine and completed a residency in orthopedic surgery and sports medicine at the University of Washington Affiliated Hospitals. He completed a fellowship in shoulder and elbow surgery at Washington University School of Medicine, Department of Orthopaedic Surgery. Dr. Chamberlain sees patients at The Center for Advanced Medicine.

 

Benjamin Zmistowski, MD
Dr. Zmistowski is an Assistant Professor of Orthopedic Surgery at Washington University School of Medicine. Dr. Zmistowski specializes in treating shoulder and elbow injuries and conditions, with a focus on rotator cuff repair, shoulder and elbow replacements, shoulder and elbow fractures and shoulder stabilization. Dr. Zmistowski earned his medical degree and completed an orthopaedic surgery residency from Thomas Jefferson University in Philadelphia, Pennsylvania. He went on to complete a fellowship in shoulder and elbow surgery at Washington University School of Medicine in St. Louis, Missouri. 

Ken Yamaguchi, MD
Dr. Yamaguchi is a Professor of Orthopedic Surgery at Washington University School of Medicine. Board-certified in orthopedic surgery, Dr. Yamaguchi is consistently listed in America’s Top Doctors and Best Doctors in America. He specializes in degenerative, traumatic, and orthopedic sports disorders of the shoulder and elbow, including treatment of the rotator cuff, instability, frozen shoulder, and degenerative and rheumatic arthritis of the shoulder and elbow. Dr. Yamaguchi earned his medical degree and served a residency in orthopedic surgery at George Washington University in Washington, D.C. He completed a fellowship in shoulder and elbow surgery at Columbia Presbyterian Medical Center in New York in 1995.

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