Nathan Wei, MD is a graduate of Swarthmore College and the Jefferson Medical College.  He completed his residency at the University of Michigan Medical Center in Ann Arbor, Michigan and his fellowship in arthritis at the National Institutes of Health in Bethesda, Maryland.  Dr. Wei is a national expert in rheumatoid arthritis and osteoarthritis and is the author of more than 500 publications.  He is a Fellow of the American College of Physicians, a fellow of the American College of Rheumatology, and the only American rheumatologist member of the Arthroscopy Association of North America.  Dr. Wei is known internationally for his expertise in stem cell and platelet-rich plasma (PRP) procedures.  He is active in clinical research and is the director of the Arthritis Treatment Center, located in Frederick, Maryland.