Dr. Leonard is a native of southern New Jersey. After graduating Atlantic City High School and Yale University, he obtained his medical degree from Albert Einstein College of Medicine in New York City. He did his Internal Medicine residency and Gastrointestinal Fellowship at the New York Hospital, Cornell Medical Center and Memorial Sloan-Kettering Cancer Center. He is Board Certified in both Internal Medicine and Gastroenterology.

Dr. Leonard is also a Fellow of the American College of Physicians. His clinical interests include all areas of gastroenterology and hepatology with a special interest in hepatitis, inflammatory bowel disease, irritable bowel syndrome, colon cancer screening and nutritional support with additional training in ERCP, the Bravo system for GERD, and the PillCam.

Dr. Leonard is married with two children and enjoys photography, travel, collecting fountain pens, and when the Philadelphia Eagles win.