Health care is one of the largest expenses during retirement. Perhaps you’ve seen the numbers. A 65-year-old retiring today is expected to need over $300,000 for health-related expenses. A lot of those costs are for co-pays, and ever-increasing deductibles. These out-of-pocket costs are why many retirees secure a Medicare Supplement or Medigap policy, to help pay some of the expenses Original Medicare doesn’t cover.