Medicare is the government run health insurance program used by millions of seniors. It is a wildly popular program that has helped many to be able to afford their health care needs. It is really a great thing because of the amount of people that have been lifted out of poverty because of it. Medicare has helped to make sure that seniors who are bringing in little to no income have a way to pay for their medical needs.
Medicare is an entitlement program. It is something that you are given just for being an American citizen. This is not to say that you do not have to pay for this program. Quite the contrary. You are paying for your Medicare benefits every time you have a job. Basically, if you have a job, then you are going to pay some money into the system. The money that you put into the program right now will be used by those who are currently on the program right now. When it comes time for you to be on this health insurance plan, others will be paying for the coverage that you receive.
There is not one exact answer to this question. You have to look into your personal situation to be able to know the answer. Most of the time, you are going to have to be 65 years of age to be able to receive Medicare. However, if you have certain disabilities, then you may be able to receive your Medicare benefits before the age of 65. Make sure that you look into government regulations to be able to figure this out for yourself personally. These answers can be found on a variety of government websites.