http://www.health.gov.on.ca/english/public/pub/ohip/eligibility.html
....
AND
-- you make your primary place of residence in Ontario; and generally speaking,
-- you are in Ontario for at least 153 days of the first 183 days immediately following the date you establish residence in Ontario (you cannot be absent for more than 30 days during the first 6 months of residence); and
--
you are in Ontario for at least 153 days in any 12-month period.
我上面说,你自己看看规定,你自己琢磨琢磨。
这里享受OHIP的规定条件之一是每年在安省居住不得少于153天。不知道省OHIP系统是否有什么办法知道是否离过境。