Yes,there,are and there are/were a few in Chiang Rai province that provide the care for foeighners.The packages are very reasonable and average price was around bht60000 per month with a Nurse by your side and with lots of amenities such as,swimming pools ,gyms,nature walks and Beutifal surroundings .
Unfortunately I can't give the name of the one I've visited as it was closed down due to the Air Pollution :(
There are quite a lot around the country and they are in Pattaya area too .
Packages,to suit all pockets .Just Google and they will show up ..