International Insurance covers a wide range of policies that provide a varying levels of coverage for those living and/or traveling outside outside of the US or Canada. Many will cover only the country in which you live, while others will cover you both in the US, and the country in which you live. Some will cover traveling to other countries as well. Most of the insurance offerings are based on age, pre-exisiting conditions, and lifetime benefits. Some offer evacuation services, while others only provide minimum coverage while in another country.
There is quite a bit of information available through LiveandInvestOverseas.com that may provide information about how to research and purchase international insurance.
It is impossible to give any detailed information of any international policies as most will be tailored to you and your specific needs. There are several insurance brokers and companies that have been providing service to those in San Miguel.