generally medicare covers 80% of one's outpatient costs. you're likely looking for a medigap plan which has nothing to do with the marketplaces set up under obamacare. to get help finding coverage medicare recipients can contact their local state health insurance assistance program which you can do by visiting the medicare. gov medicare helpful contacts page or by calling 1-800-medicare (1-800- 633-4227).
what if i lose my medicare? do i get a plan that pays the 20% that's left?