Phi Chi (ΦΧ) is one of the oldest and largest international medical fraternities of its kind in the world. Phi Chi evolved from the merging of two professional medical fraternities bearing the same name. Phi Chi Society (Phi Chi East) was founded March 31, 1889, at the University of Vermont, Burlington, Vt. Phi Chi Medical Fraternity (Phi Chi South) was founded October 26, 1894, at the Louisville Medical College, Louisville, Ky. These two organizations did not know that they shared a similar name when they were founded. On March 5, 1905, in Burlington, Vt., Phi Chi Society and Phi Chi Medical Fraternity, Inc. consolidated, taking the name Phi Chi Medical Fraternity, Inc.
Phi Chi has grown to become a co-ed, international, professional medical fraternity with chapters in five countries.