If an individual is receiving Social Security benefits when he/she turns 65, he/she will automatically be enrolled in Medicare.
However, a person may turn down Part B of Medicare. If a person has been receiving Medicare disability benefits for 24 months, he/she will automatically be enrolled in Medicare.
If a person turns 65 and plans to keep working and not sign up for Social Security at that time, he/she can sign up for Medicare only.
There are other rules associated with Medicare enrollment including penalties for not enrolling in Part B when a person is first eligible. Starting in 2007 the monthly cost for Part B is based on income.
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