The WorldTrips Atlas International is a single-trip Travel Medical plan available to U.S. and non-U.S. citizens who are traveling outside of their home country (but not within the U.S.). This plan offers up to $2,000,000 medical coverage.
To learn more, see the WorldTrips Atlas International product page.
Tokio Marine HCC Medical Insurance offers the Atlas International plan which satisfies the embassy requirements as long you purchase a plan with a 0 USD deductible. Tokio Marine will email the policy usually within 15 minutes of purchasing the policy along with instructions on printing the embassy approved letter needed to obtain the visa.