Dr. Pennisi received his medical degree from Georgetown University Medical School in Washington, D.C. in 1980 and completed his residency in OB/GYN at San Joaquin General Hospital in 1984. He is a diplomat of The American Board of Obstetrics & Gynecology. He joined Gill OB/GYN Medical Group, Inc. in 1998 and specializes in providing complete prenatal care for the last 20 years.