There's a lot of really great information here in the forum on virtually all aspects relating to health.
With a little more research you may be able to find a decent healthcare plan from one of these:-
Philhealth Insurance from Philippine Goverment -
PhilHealth
Blue Cross Philippines
Fortune Care
Globe Insure
Insular Life Health Care
Bupa International
Health Care International
If during the course of your research you come across something interesting maybe you could post it here
I'm one of those folks who would say that when reaching a certain age you might be inclined to base your searches of where to live in the Philippines on the location of great hospitals and easy access to them.
You may well be lucky enough to be able to afford the best healthcare plan on the planet, but if you can't easily get to a hospital that can provide that level of healthcare then it's next to worthless. Just my 2 centavos, but based on personal experience.
Please check out our forum Health section. Especially the 'stickies'