Hi, I went to immigration in Udon Thani to do my 90 day report.
My info: OA issued in Washington DC., stamped in to August 2020.
The Immigration Official asked if I had insurance, I do not. He stated when I leave Thailand to have Christmas in USA and return, if I do not have insurance I will only get stamped in for 30 days. This is to allow me to purchase insurance.
TLDR : Answer Summary
The user shares their experience at Udon Thani immigration while doing a 90-day report on their O-A visa. They were informed by an immigration official that without health insurance, returning to Thailand after Christmas would result in only a 30-day stamp. The situation may vary as recent updates suggest some immigration offices might allow one-year stamps for O-A holders. Additionally, there are discussions about the types of acceptable health insurance and the complexities related to it.