I just called AmEx Platinum card service and was told that as a Platinum cardholder (whether we use it or not) we do have emergency evacuation up to $500,000 anytime we're over 150 miles from home. It does NOT include medical or dental coverage, just evacuation only.

If you want medical coverage than you must pay for the AmEx policy (which we also have). We also have medjet. The one big difference with medjet is they evacuation you in a medical emergency to a hospital close to home, not just the closest hospital.