John Edward McCarville is from an Irish Catholic farming family in Iowa. He traveled to Arizona for his respiratory health and attended premedical classes at a college now known as Arizona State University (ASU). He graduated in medicine from Creighton University in Omaha, Nebraska in 1951. He set up a general practice in 1953 next to an old-fashioned soda fountain pharmacy in Phoenix, Arizona.He warned the nation of the dangers of suffocation from plastic bags, became an avid pilot, was Flight Surgeon for the Arizona Army National Guard and examined a 9/11 terrorist. Major changes in the health care insurance industry propelled him from family practice into aviation medicine full time. Still in practice today, he is one of the few First Class FAA Medical Examiners in the state of Arizona. This biography provides an intricate detailed background of his Irish Catholic heritage and his life experiences with the market force dynamics of the healthcare industry from the depression era until present day.