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Insall Scott Kelly® Institute and St. Francis Hospital

St. Francis Hospital's Department of Orthopedic Surgery now includes members of the Insall Scott Kelly Institute (ISK) for Orthopaedics and Sports Medicine, nationally renowned for their state-of-the-art treatment of orthopedic and sports-related ailments. Our physicians are dedicated to serving the unique needs of the orthopedic patient and providing high quality care. Our goal is to get our patients back to an active, rewarding, and pain-free life as quickly as possible.

Services include:

  • Sports medicine
  • Arthritis prevention
  • Partial Joint Replacement
  • Ligament reconstruction
  • Cartilage restoration
  • Arthroscopy
  • Joint resurfacing
  • Total Knee Replacement
  • Total Hip Replacement
  • Revision Joint Replacement
  • Total Shoulder Replacement
  • Foot and Ankle Surgery
  • Fracture Care
  • Total Ankle Replacement

ISK is proud to be a sponsor of WOGO, the Women Orthopedists for Global Outreach, founded by former ISK Fellows, dedicated to providing free medical care for women in developing countries. Our surgeons have contributed important research in the following areas:

  • New concepts and technology in Total Knee Replacement in Total Knee Replacement
  • Treatment of post-traumatic foot/ankle arthritis foot/ankle arthritis
  • Bone Graft options in Reconstructive Orthopaedic Surgery

Timothy G. Reish, M.D., earned his medical degree from Temple University School of Medicine in Philadelphia. He completed his Orthopedic Residency at the Ohio State University.  He then completed a one year fellowship in Shoulder and Knee Reconstruction at the Insall Scott Kelly Institute and continued on as a clinical staff physician. Dr. Reish is the head of the division of Shoulder and Elbow surgery in the department of orthopedic surgery at St. Francis Hospital and is one of the leading shoulder replacement surgeons on Long Island.  He has published and lectured extensively on arthroscopic and arthroplasty treatments for arthritic disorders of the shoulder.  He specializes in Shoulder, Knee, and Elbow reconstruction, sports medicine, and minimally invasive total shoulder replacement.



Michael N. Kang, M.D., specializes in the treatment of conditions of the hip and knee including hip arthroscopy, hip resurfacing, and primary and revision total joint replacement. He completed an undergraduate degree at Dartmouth College. After receiving his medical degree at Temple University, he completed his training in orthopedic surgery at the New Jersey Medical School followed by a fellowship in Adult Reconstruction of the Hip and Knee at Stanford University. Dr. Kang is a specialist in the treatment of hip and knee arthritis at ISK and employs minimally invasive techniques as well as alternative bearings in the appropriate patient.




Craig S. Radnay, M.D., specializes in foot and ankle surgery, lower extremity trauma, sports medicine, and arthritic disorders and joint replacement of the knee. He earned his medical degree and Masters of Public Health degrees from the Columbia College of Physicians and Surgeons in New York City. He then completed a residency in orthopedic surgery at Columbia University Presbyterian Hospital. Dr. Radnay's completed a fellowship with the Insall Scott Kelly Institute where he trained with the physicians for the New York Knicks and New Jersey Nets NBA teams. He then pursued a subsequent fellowship in foot and ankle surgery and lower extremity trauma at the renowned Florida Orthopedic Institute in Tampa.




William J. Long, M.D., is a board certified specialist in hip and knee reconstruction who obtained his medical degree from the University of Western Ontario. Following his residency at Queens University in Kingston, Canada, he completed two fellowships: the first in primary and revision joint replacement of the hip and knee at the Mayo Clinic in Rochester, Minnesota, and the second in knee surgery and sports medicine at the Insall Scott Kelly Institute in New York, where he is now a director and chief of research. He sits on the Graduate Medical Education committee at Lenox Hill Hospital and is a reviewer for the Journal of Arthroplasty. Dr. Long's subspecialty interests include less invasive hip and knee joint replacement, unicompartmental knee replacement, and sports medicine with rapid rehabilitation. He lectures and publishes extensively on hip and knee topics at national and international level. Dr. Long has authored more than 35 chapters, articles, and peer reviewed publications and is the editor of an upcoming textbook on complex revision joint replacement.

Make an appointment at:

New York Office:
260 East 66th Street
New York, NY 10065
(646) 293-7510

Long Island Office:
2200 Northern Blvd, Suite 121
East Hills, NY 11548
(516) 705-1044



Best Nurses, Magnet Recognized

St. Francis Hospital has earned the coveted Magnet award for excellence in nursing.

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