If I move out of State and have Medicare, do I have to make any changes? The Original Medicare doesn’t have provider networks; and you can use most of the hospitals or doctors throughout the country that takes Medicare. Share Frequently Asked Questions - Medicare FAQsHow much does Medicare cost me?How often do you have to enroll in Medicare?How to change my Medicare plan?If I am 65 years old I am working, but I am eligible for Medicare?What if I have Medicare and a health plan for my job, but I am retiring?What is a Medicare Advantage Plan?What is the best Medicare Advantage plan?