I read over my policy and while it will not cover surgeries performed overseas like SRS, it does cover emergency care in foreign countries. I am going to Serbia later this month for my bottom surgery. Insurance won't pay for that. But if I were to break an ankle over there or need a course of antibiotics from an infection I pick up there, insurance would pay for those things.
Every policy is different though, and I think policies like mine are the exception and not the norm. So if something like that is what you're concerned about (ie. emergency care abroad and not SRS coverage), I would check your existing policies first. I also think there are supplemental policies out there that you could purchase if yours doesn't include emergency care.
I would also say though, price-wise, the cost of these plans is very expensive. It may just be cheaper to pay out of pocket directly to the hospital/doctor that treats you than to pay for a plan.