An individual should sign up for Medicare Hospital Insurance, "Part A," three months before reaching age 65, according to the Social Security Administration, whether or not retirement benefits are applied for or anticipated.
When signing up for Medicare Part A, the applicant is asked about enrolling in Medical Insurance, "Part B," which helps pay for services and supplies not covered under hospital insurance. If an applicant chooses not to enroll in Part B, then decides to do so later, coverage may be delayed and monthly premiums may be higher. Special enrollment periods may extend the window of enrollment for Medicare. One reason not to enroll in Medicare Part B is being currently employed and eligible for a satisfactory,group health insurance plan at work.