I'd definitely skip Thailiand and Indonesia as unfortunately tons of their meals are cooked in peanut oil even if they don't contain nuts and its just too risky even when you're clear before ordering food with the language barriers etc.
Plus even though there are lots of great hospitals there I'd opt for somewhere more Westernised with your needs.
We're looking at Hawaii in January, even though its their winter it's still average temp of 27-28 degrees. There are a lot of deals at the moment for LA & Hawaii or LA with Fiji on the way home. California, Napa valley, Vegas, Grand Canyon, San Francisco etc. tons to see and do in those areas - you could even road trip part of it.
If you're thinking Europe I'd be prepared for cold - Spain & Italy: expect snow! But you could go for a ski trip? Swiss alps would be pretty cool.