Eligibility:

The following International Travel plans are available to non-U.S. citizens while participating in exchange activities - business, academic, research, cultural, training - in the United States.

These plans offer accident and medical expenses, medical evacuation and repatriation, and accidental death and dismemberment.  The Plans also features important medical and travel assistance services.

Gateway USA: http://www.gatewayplans.com/individuals/business-or-sponsored-travel/gateway-usa

International Student Protection:
http://www.intlstudentprotection.com/insurance_plans/temp_visitors.php

ISO Med Platinum/Gold/Silver:
http://www.isoa.org/iso_med_main.aspx