Medigap plans are accepted by every Medicare-participating provider in the United States, with some emergency benefits worldwide. If you travel frequently or live part of the year out-of-state, these plans may be right for you. Part D plans provide nationwide coverage from participating pharmacies. While Medicare Advantage plans cover urgent and emergency services nationwide, some may not provide nationwide coverage for non-emergency services. If you live part of the year out-of-state, Medicare Advantage plans may not be right for you.