What are the COVID-19 document requirements for departing Thailand to the US?

Hello everyone. Im flying back to the US. I understand that for arrivals to Thailand that certain documents for Covid-19 are to be presented with medical insurance of 100K. What about heading back to the US or departing from Thailand. Im guessing that is not needed but dont want to guess and want to be sure. I want to leave on Tuesday which means tomorrow I can do a health check but not sure about where to get medical insurance. Apologies if this is a bit off topic