Visitor insurance is a short-term health insurance covering new sickness and new injuries that may happen during a trip. Irrespective of the purpose of trip, business or leisure, visitor insurance is necessary (though not mandatory for entering any country including USA). It provides benefits in times of medical emergencies, and therefore, MCIS, one of the largest brokers of visitor insurance in USA, highly recommends purchasing it. In this article, MCIS from its customer experience would like to share some basic but very useful information about visitor insurance.