Sorry, I forget, how long before "admitted until" can you extend a tourist stay in Bangkok? I think I saw 40 days somewhere.
And would whatever the rule is at Chaengwattana also apply at Bumrungrad?
Thanks for any pointers!
TLDR : Answer Summary
The user is inquiring about the timeframe allowed for extending a tourist visa in Bangkok before reaching the "admitted until" date, and whether the extension rules at Chaengwattana also apply at Bumrungrad.