Dr. William T. Long, Founder

Computer Surgery Institute (CSI)

Dr. Long was born and raised in Los Angeles where he was a standout athlete at Serra High School. He was awarded the prestigious University of California Regent’s Scholarship and earned his medical degree from the University of California, San Diego. Dr. Long completed joint replacement fellowship training at the Kerlan-Jobe Orthopaedic Clinic and the University of Southern California.

Board certified by the American Academy of Orthopaedic Surgeons, Dr. Long is an active member of numerous national hip and knee replacement societies. He is also an educator who teaches orthopedic surgeons at universities and international symposiums around the globe.

Dr. Long and his team have performed free hip and knee replacement operations for patients in the U.S. and around the world as part of Operation Walk. In his free time, Dr. Long mentors medical students and shares his knowledge of and passion for sprinting and long jumping with student athletes. He is a World Masters Track and Field Champion in the long jump and continues to compete when time permits.                  

Read more about Dr. Long’s recent

Board of Directors appointment


Christopher Goring, M.D.

Christopher Goring, M.D.


Dr. Christopher Goring 

Orthopaedic Surgeon

Proudly served as an orthopedic surgeon for the U.S. Army for 15 years. In 2013, he completed joint replacement fellowship training at the University of Southern California and joined Dr. Long and the CSI team. Dr. Goring is highly skilled and experienced using Computer-assisted surgery for primary and revision hip and knee replacements. He also speaks fluent Spanish.

Screen Shot 2018-02-20 at 5.42.49 PM.png
Dr. Bryan Chan, M.D.

Dr. Bryan Chan 


Dr. Chan and Dr. Long have worked together in the operating room for more than 15 years. Together they have performed more than one thousand operations in the U.S. and abroad. He is a master of Rapid Recovery Anesthesia and regional anesthesia techniques.

Dr. Julio Raya, M.D.

Dr. Julio Raya 


When he was director of the busiest obstetrics service in the U.S., Dr. Raya perfected regional anesthetic techniques that block pain at the surgical site. Additional experience at Los Angeles County-University of Southern California Medical Center refined the techniques that allow patients to breathe during surgery without inhaling anesthetic gas.

Screen Shot 2019-06-27 at 6.48.25 PM.png


Screen Shot 2018-08-18 at 11.20.56 PM.png

California Lung Associates The physicians of California Lung Associates are among the top lung specialists in Southern California. Long ago, it was clear to CSI that it is better to consult with the lung specialist before surgery to prevent blood clots than to call them after a clot has occurred. They provide an additional level of safety that gives confidence to our patents. 

Screen Shot 2018-08-18 at 11.21.30 PM.png

Dr. Michael Stefan For more than a decade, Dr. Stefan has provided specialized internal medicine care for joint replacement surgeons at St. Vincent Medical Center. His special knowledge and experience in taking care of joint replacement patients keeps our patients safe, comfortable and medically stable during the hospital stay and through the smooth transition home.

Screen Shot 2018-08-18 at 10.34.43 PM.png