International Travel Insurance for Mountains:
Most commercial operators will require you to have a Rescue Insurance Policy for almost all of the Seven Summits. This is to insure financial coverage for evacuation is accounted for but in most cases does not include trip interruption or cancelation coverage. So you should check what is included on different insurance policies.
For a really thorough and tailor made Rescue Insurance Policy for adventure travel we recommend Global Rescue. The policies cover costs involved with Rescue, evacuation, and some medical coverages, plus more benefits. Mountain Professionals is an affinity partner with Global Rescue and recommends the IMG Travel Policy they offer as a very good insurance plan. Click the link below to find out more about the policies or enroll in a plan of varying lengths to cover your trip.
If you are traveling to Mt. Vinson, at this time the Global Rescue standard policy does not cover polar latitudes, so you will need to use one of the following options which also have additional cancelation and trip interruption plans.