| Dr. Ya Ju Chang is a New York state licensed medical doctor, specializing in Rheumatology. Graduated Magna Cum Laude from Brazil, completed residency training in Beth Israel Medical Center, and completed the Rheumatology specialist training at Mt. Sinai Hospital(NY). Dr. Chang currently is working at Global Medical Associates, located in 10 Union Square East #203 New York NY 10003 | |||