Travel insurance policies are designed to cover travelers from the day they leave home until the day they return home. In order to purchase trip cancellation coverage, a traveler must insure their entire trip length.
However, some travelers may only be seeking medical coverage for a portion of their trip. An international medical policy is designed for an extended period of travel and primarily provides emergency medical coverage. Travelers can choose the dates of coverage, rather than being limited to specific departure and return dates. Most of these policies can be renewed or extended, as long as it is done before the expiration date of the policy.