In his practice, he is particularly interested in diabetes. Dr. Fonseca is professionally affiliated with Tulane Medical Center, Southeast Louisiana Veterans Health Care System, and Tulane Lakeside Hospital for Women and Children. He studied medicine at Armed Forces Medical College and Johns Hopkins University School of Medicine. Dr. Fonseca honors United Healthcare Choice, United Healthcare HSA, and Humana HMO, in addition to other insurance carriers. He has received the following distinction: New Orleans Super Doctors.