How Does Medicare Supplemental Insurance Work? 
Medicare Supplement plans are designed to supplement your Medicare . SinceMedicare , like most medical insurance policies , pay a portion -LRB- 80 % -RRB- ofyour medical costs . TheMedicare Supplement planwill pay additional expenses , up to 100 % , of your medical expenses . It is important that you are clear on your needs and budget in decided which plan is best for you . 