There are international companies offering health insurance in Thailand. In Canada I'm only aware of companies offering travel health insurances. So are limited in terms of time. Some Thai companies do offer health insurance, there more difficult to understand and need a careful review.
funny enough in the x years I've had it, its one of the first times its been useful. But with the bank changes it may well be needed. BTW I only used the book because it was first on the menu. I could have used my pink card or driving licence.