Do you need to provide proof of $50,000 Covid insurance when extending a 30-day tourist visa in Thailand?

They do not ask for health insurance for a 30 day extension of stay based on tourism. You will need the following documents for a 30 day extension of stay based on tourism:

1. Your passport and:

a. a copy of your data ("picture") page

b. a copy of your most recent visa (if you have one)

c. a copy of your most recent stamp

d. a copy of your departure card

2. [May not be asked at Bangkok Immigration] A TM30, filed in the immigration office.

3. The forms (each immigration office may have different forms, and want to use their special forms)

4. 2x passport pictures

5. 1,900 THB.