There are five types of election periods during which individuals may make enrollment requests.
ANNUAL ELECTION PERIOD (AEP)
OCTOBER 15th through DECEMBER 7th - During this time all Medicare beneficiaries are able to enroll in a Medicare Advantage Plan, or you can change from one Medicare Advantage plan to another "like" plan. This is the only period where you can enroll in a Medicare Advantage Plan for 2018 for membership in 2018.
THE MEDICARE ADVANTAGE DISENROLLMENT PERIOD (MADP)
JANUARY 1 through FEBRUARY 14 - Medicare Advantage plan members may disenroll from any MA plan and return to Original Medicare between January 1 and February 14 of every year. A request made in January will be effective February 1, and a request made in February will be effective March 1.
SPECIAL ELECTION PERIODS (SEP)
An SEP IS AVAILABLE THROUGHOUT THE YEAR for those who qualify. Some of the common reasons that qualify a beneficiary to join an SEP include moving out of your current plan's service area, losing Employer or Union coverage, status as a Full or Partial Dual Eligible, or enrollment in a PACE program.
OPEN ENROLLMENT PERIOD FOR INSTITUTIONALIZED INDIVIDUALS (OEPI)
The OEPI is continuous for eligible individuals who meet the definition of “institutionalized” to enroll in or disenroll from a Medicare Advantage Special Needs Plan for institutionalized individuals.
INITIAL COVERAGE ELECTION PERIOD (ICEP)
The ICEP for an MA enrollment election will often revolve around an individual"s 65th birthday or the 25th month of disability. It is always associated with one's entitlement to both Medicare Part A and Part B. This period begins three months immediately before the individual's first entitlement to both Medicare Part A and Part B and ends on the last day of the month preceding entitlement to both Part A and Part B or the last day of the individual's Part B initial enrollment period (whichever date comes last).