nova scotia canada questions

I was wondering if there is anyone out there that is from Nova Scotia or Canada that has gone to Mexico to be the sleeved and ran into medical problems. While there and when you returned to Canada does our health care cover us once we are home even though we went out of country for surgery. Is there a private insurance company  that will cover us in Mexico knowing we are going for surgery??   Any input is appreciated as I am planning on going in Jan .