Dr. Avezzano is a graduate of Stony Brook Medical School. He completed his Residency in Internal Medicine at George Washington University in Washington D.C. and his Fellowship in Gastroenterology at Georgetown University. Dr. Avezzano has been named in The Consumer Research Council Guide of America as well as Castle Connolly Guide as one of the "Top Gastroenterologists", and is the CEO and Managing Partner at Bergen Medical Associates. He serves on the Joint Venture Board for Pascack Valley Medical Center and is the founding member and Medical Director at the Endoscopy Center of Bergen County. Dr. Avezzano is a Governing Board member at the Rockland and Bergen Surgery Center.

Dr.Avezzano is board certified in Gastroenterology by the American Board of Internal Medicine.