OKAY listen up people who are on yearly extensions of stays from the immigration office based on originally having an O-A visa.
It is confirmed (at least in Jomtien) that if your yearly extensions are based off an O-A visa (that you got in your country before you came here) you WILL need to have health insurance to get a new extension effective TODAY.
TLDR : Answer Summary
Expats holding a yearly extension based on an O-A visa must obtain health insurance to renew their extension. This rule has been confirmed in Jomtien and is effective immediately. It’s important to check the specifics on your visa status, as the requirements vary depending on whether you have an O or O-A visa.