Can I use foreign insurance for my Non A-O and Non O visa requirements in Thailand?

A married couple returning to Thailand on a Non A-O (retirement) visa and a Non O (dependent) visa inquired about health insurance requirements. They asked if insurance from any country is acceptable as long as it meets the necessary requirements, or if it must be from a Thai insurance company. Comments indicated that foreign insurance can be used if it meets the requirements and proper documentation is submitted. A specific form needed for foreign insurance was also mentioned, alongside a question about whether Medicare insurance combined with Medigap would meet the requirements.