Andrew S. Greenberg received a B.S. degree in food and natural resources (cum laude) from the University of Massachusetts at Amherst in 1981, studied bio-chemistry at Rutgers University from 1982-1983, and received his M.D. degree from the University of Medicine and Dentistry of New Jersey in 1987. He completed an internship at the Morristown Memorial Hospital in 1988 and a residency in radiation oncology at the Hospital of the University of Pennsylvania in 1991.

Dr. Greenberg joined Atlanta Radiation Care, Inc. in Atlanta, Georgia, in 1991 as an attending radiation oncologist. In 1992, he joined Princeton Radiology Associates and, in 1994, he was appointed attending radiation oncologist for CentraState Medical Center in Freehold, New Jersey.

Dr. Greenberg is a member of the American Medical Association, American Society for Therapeutic Radiology and Oncology, American College of Radiology, Medical Society of New Jersey, Oncology Society of New Jersey, and the Mercer County Medical Association. He is a member of the Medical Center at Princeton's (MCP) Cancer Control Committee and Bioethics Committee, and is the co-director of MCP's Tumor Board. Dr. Greenberg was among New Jersey Monthly's "Top Doctors in New Jersey" in October 1998.