Here are key deadlines for enrollment in Medicare Advantage plans for 2024:

• From Oct. 15 to Dec. 7— You can switch from Medicare to Medicare Advantage, or do the reverse and return to Original Medicare. You also can switch Medicare Advantage plans, or change prescription drug plans, known as Part D. If you did not enroll in Part D plans when you were first eligible for Medicare, you can do so during this period.
• Jan. 1, 2024 — Changes made during fall enrollment will take effect.
• Jan. 1 to Mar. 31 —If you have a Medicare Advantage plan, you can change to a different plan or switch to Original Medicare (and join a separate Medicare drug plan) once during this time. Any changes you make will be effective the first day of the month after the plan receives your request.
• Exceptions — You can make changes to your Medicare Advantage and Medicare prescription drug coverage anytime in 2024 if you have special circumstances, such as if you move, are no longer eligible for Medicaid, your plan goes out of business, or you lose coverage from your employer.
• 5-Star Special Enrollment — You can switch to a 5-star rated Medicare Advantage plan, if there is one available in your area, from Dec. 8, 2023 through Nov. 30, 2024. You can make this switch only once during this time period.