He went to the University of Iowa for medical school then to the University of southern California for his residency and finally he did a fellowship at Hospital for Special Surgery in New York where he learned how to do joint replacements. He also is a professor at USC. Dr. Door explains what is really means to have an arthritic hip and what factors can lead to needing a hip replacement. He really believes that for someone who is a significant amount of hip pain that this is a “quality of life disease” that can be solved trough hip replacement surgery, the country’s number one surgery on a scale of patient satisfaction.