The General Enrollment Period (GEP) is for Medicare-eligible individuals who did not sign up during their Initial Enrollment Period (IEP) which is based on birthdate. The General Enrollment Period is from January 1 – March 31st every year. Coverage for individuals who enroll during the GEP will begin on July 1st of that year. Unfortunately, most individuals who miss the IEP and sign up during the General Enrollment Period will face late-enrollment penalties.