Who Needs Medigap? 
Anyone 65 or older on Medicare who wants to create a very predictable healthcare expense structure where they do n't leave themselves exposed to many costs and high hospital/doctor bills should buy a Medigap plan . Original Medicare -LRB- Parts A & B -RRB- only cover about 80 % of a senior 's health care expenses , leaving the insured responsible for the other 20 % . While 20 % does n't sound like a very big figure , it can add up to a nice big medical bill really fast . For example , if you had a procedure done that cost $ 10,000 and Medicare paid for 80 % -LRB- $ 8,000 -RRB- , you would be responsible for the other $ 2,000 of the bill - how many people can just get out their checkbook and write a check for that amount ? That number can be a lot higher too . The idea of a Medicare Supplement plan -LRB- commonly referred to as a Medigap Plan -RRB- is to cover the gaps in coverage that Medicare does n't pay for -LRB- e.g. that other 20 % -RRB- . You pay a monthly premium to get these gaps covered so you 're not hit with large bills . The resulting major advantage is it allows a senior to create a much , much more predictable health care expense structure - and when you 're on a fixed income , this is vital . A plan F is the most comprehensive Medicare supplement plan available in the marketplace today - plans C , G , and N are very competitive as well . I hope the information is helpful - please feel free to contact me for assistance with your Medigap coverage needs , including quotes and plan comparisons , and if you have any other questions . Thanks very much . 