A Board-Certified OB/GYN, Dr. Lillian DeCosimo received a Premedical Sciences degree and Medical Degree from the Universidad Mundial Dominicana in Santo Domingo, Dominican Republic. She completed an internship and residency in Obstetrics and Gynecology at Providence Hospital in Washington, D.C., and MedStar Washington Hospital Center in Washington, D.C. Dr. DeCosimo is licensed in District of Columbia, Florida, and Virginia.