A very good question indeed. The answer is simple. Do a little research about the costs of medical care in the United States, America Health Insurance Plans (AHIP) website is a good place to start. Soon you will discover that it is not cheap for comparable care in the USA. It is advisable that visitors should go through several visitors insurance plans before making an online purchase. The best way to evaluate various visitor medical insurance policies is shopping online on VisitorsInsure.com. Comparison of several visitors health insurance plans like Atlas America Insurance, Patriot America Insurance, Visitor Care Insurance, Immigrant Secure Insurance, etc will be useful for USA visitors or even international travelers while they are in the USA or Canada.