Special Enrollment Periods (SEPs) for Parts C & D

Special Enrollment Periods (SEPs) exist for Part C (Medicare Advantage) and Part D (Prescription Drug) plans under certain circumstances. SEPs allow you to enroll in or disenroll from a Medicare Advantage (MA) plan or Part D plan depending on your situation. In addition, if you believe you made the wrong plan choice because of inaccurate or misleading information, including using Medicare’s Plan Finder, you can call 1-800-MEDICARE and explain your situation. They can give you a SEP on a case-by-case basis.

See below for a summary of many situations that give you a SEP.

  • Starting January 1, 2024, if you sign up for Part A or Part B during a Special Enrollment Period because of an exceptional condition, you’ll have 2 months to join a Medicare Advantage Plan (with or without drug coverage) or a Medicare drug plan (Part D). Your coverage will start the first day of the month after the Medicare Advantage Plan gets your request to join.
  • If you are unable to make needed coverage changes during a given Medicare election period (such as Medicare’s Open Enrollment Period, Oct 15 – Dec 7) due to a public health emergency and/or a natural disaster (such as the COVID-19 pandemic and/or wildfires), you have an SEP. This SEP starts at the start of the incident and ends 2 months later. The coverage change will be effective the first of the following month. See CMS’ Current Emergencies webpage for more information.
  • If you’re in an MA or Part D plan that is terminating at the end of the year (December 31), you have an SEP to enroll in a different MA or Part D plan or return to Original Medicare. This SEP is from December 8 of the current year through the end of February of the next year. Note that this SEP gives you another chance to enroll in an MA or Part D plan in addition to the Annual Election Period, also known as Open Enrollment, from October 15 through December 7, when you can switch, enroll in or disenroll from MA and Part D plans. Any plan changes made before December 31 are effective January 1. Plan changes made after December 31 would be effective the first day of the following month.
  • If Medicare terminates its contract with your MA or Part D plan because of misconduct and/or other reasons, your plan must give you 30 days notice before the termination date. Your SEP to switch to another plan begins 1 month before the termination happens and lasts for 2 months afterward. You can choose to have your new MA or drug plan coverage begin up to 3 months after the month your previous plan ended.
  • If you are enrolled in a Medicare Advantage (MA) plan (with or without drug coverage), you can take advantage of the Medicare Advantage Open Enrollment Period (MA OEP). This runs from January 1 to March 31 each year, starting in again in January 2019. During the MA OEP, you can switch to another MA plan (with or without drug coverage), or disenroll from your MA plan and return to Original Medicare. If you choose to do so, you can also enroll in a Part D prescription drug plan. The MA OEP does NOT allow you to: switch from Original Medicare to a Medicare Advantage Plan; join a Medicare Prescription Drug Plan if you’re in Original Medicare; or switch from one Part D prescription drug plan to another if you’re in Original Medicare.
  • If you move out of your plan’s service area, you have a 2-month SEP to enroll in a new plan offered in your new residence area. This SEP begins either the date of your permanent move or the date you notify your plan of your move, whichever is later.
  • If you live in an area with a Medicare Advantage and/or Part D plan(s) that has an overall plan performance rating of 5 stars, and you’re otherwise eligible to enroll in the plan, you have an SEP to join that plan. Medicare releases plan performance ratings each fall and the ratings apply for the following calendar year. Your SEP is from December 8 through November 30. Your new coverage will become effective the first day of the following month. You can use this SEP to enroll in a 5-star plan only once during the SEP.
  • If you are eligible for full Medi-Cal benefits, you have an ongoing SEP to enroll in or change Medicare Advantage Prescription Drug plans (MA-PDs) or Part D plans once a quarter for the first 3 quarters of the year. Your coverage will be effective the first of the following month. You can also make one change during the Annual Election Period (AEP), also known as Medicare’s Open Enrollment that runs from October 15 – December 7. Your coverage will be effective January 1. Note that beneficiaries who have been identified as “at risk” for opioid abuse, may be further restricted from changing plans.
  • If you lose your full Medi-Cal benefits, you have a 3-month SEP to change MA-PD or Part D plans, starting the month you receive notice of the eligibility loss.
  • If you become eligible for the Part D Low-Income Subsidy (LIS) or Extra Help, you have an ongoing SEP to change MA-PD or Part D plans as long as you qualify for the Extra Help. You can change plans once a quarter for the first 3 quarters of the year. Your coverage will be effective the first of the following month. You can also make one change during the Annual Election Period (AEP), also known as Medicare’s Open Enrollment that runs from October 15 – December 7. Your coverage will be effective January 1. Note that beneficiaries who have been identified as “at risk” for opioid abuse, may be further restricted from changing plans.
  • If you lose the Extra Help, you have a 2-month SEP to change MA-PD or Part D plans starting the month you receive notice of the subsidy loss.
  • If you are institutionalized (live in a nursing home, skilled nursing facility, etc), you have an SEP to enroll into, switch or disenroll from your MA and/or Part D plan on a monthly basis. Also, if you move out of the facility, you have a 2-month SEP to change plans. Your new coverage is effective the first of the following month.
  • If you enroll in Part B during the General Enrollment Period (GEP), but are not entitled to Part A without paying a premium, you have a SEP to enroll in a Part D plan the first of the following month after your Part B is activated.
  • If you enroll in Part B during the General Enrollment Period (GEP), and already have Part A, you have a SEP to sign up for a Medicare Advantage plan (with or without drug coverage) the first of the following month after your Part B is activated.

Note: Part B also has a SEP. This SEP is for people who have employer group coverage and delay enrollment in Part B. When a person’s employer coverage or employment ends (whichever is sooner), he/she has an 8-month SEP to enroll in Part B without a penalty. See If You Delay Enrolling in Part B.

For more information on additional SEPs, contact your local Health Insurance Counseling and Advocacy Program (HICAP). Also see a more extensive list of SEPs on Medicare.gov.

See also