The General Enrollment Period (GEP) is the time period every year from January 1 to March 31 when you can enroll in Medicare Part B for the first time if you missed your Initial Enrollment Period (IEP) and do not qualify for the Part B Special Enrollment Period (SEP). When you enroll during the GEP, your coverage will begin on July 1, and you may have to pay a Part B late enrollment penalty.

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