If you plan to reside outside your home country for an extended period, you will need comprehensive medical insurance until you become eligible and choose to enroll in a plan in your new country of residence.  Some countries offer "Single Payer" (Gov't subsidized) plans for all qualified residents.  It is important that you check out the availability and requirements of local plans before any coverage in your home country expires.  Your current "domestic" coverage may not apply outside your home country.