I submitted my EVisa (non O, 90 days) 23. June 2025. and received Thai approval July 1. 2025. Osaka, Japan, Royal Thai Consulate. Took 5 business days. I am on that visa in Bangkok now, since July 3. 2025.
I had that comprehensive insurance policy, paid by my American employer, in Japan, for 15 years. It was about 1,200 US$ a month, paid by the company. CIGNA was the insurer.
All covered, whole family, worldwide, including dental.
Take it as the top and scale down to Thailand only.
Simply, you can not open a bank based solely on an account based on overseas bank account whatever money you may have in it. What you can do, said here many times, apply for an "Non Immigrant O visa, 90 days. Then your bank account counts, wherever you are,