That's the least of my problems. I want to avoid leaving Thailand every 3 months and avoid paying for health insurance as laid out by the Immigration dept.
Robert Largas okay so you are saying that if my extension of stay is valid until Jan. 5 2020 I can get a re-entry permit and go to Vietnam and apply for a Non-Immigrant -O visa before or after the Jan. 5 expiry date? I can't, as you say, leave Thailand after the last day of permitted stay without having to pay for an overstay.