The first and best value medical insurance would be Phil health..So get that no matter what and say thank you to the president!!
After that things do get a little pricey and IMO would work out more expensive than the actual treatment..Blue cross comes to mind! http://www.bluecross.com.ph/
There are quite a few more as Im sure you have seen after a quick Google search..
Of course there is the good old NHS which I will take full advantage of if the treatment is expected to be over more than lets say a trip back to the UK..
(plus expenses)
Also.. If you are only coming over for 6 months a year ,why not take out travel insurance in the UK before each trip??
