You should re-apply if you leave more than3 month. My friend had the same situation just as yours. After he came back and went to the hospital for some disease, they told him he should re-apply and paid for every thing at that time.
LANDING后，回国超过三个月后，再回来，HEALTHCARD是否一定要重办？如不重办，是否看病就没有OHIP COVER ? 另外，到那里找将国语的家庭医生？谢谢！！！