Dr. Cornejo earned his medical degree from Universidad Autónoma de Guadalajara Facultad de Medicina Guadalajara in Mexico. In 2004, he founded, along with other eminent peers and professors, the first Scientific Society of Medical Students at this university. Subsequently, he completed an internship and a residency in general surgery at the University of Texas, San Antonio. He also completed a fellowship in plastic and reconstructive surgery at Duke University.