Can Ms. Moss use the MA Open Enrollment Period to enroll in a new MA plan after remaining in Original Medicare?

The correct answer highlights that the Medicare Advantage (MA) Open Enrollment Period (OEP) is exclusively for individuals who are already enrolled in a Medicare Advantage plan. During this period, these enrollees have the opportunity to make changes to their existing MA plan, such as switching plans or returning to Original Medicare, but it does not apply to those who are still using Original Medicare.

So, if Ms. Moss is currently enrolled in Original Medicare and has not been enrolled in an MA plan, she cannot utilize the MA OEP to enroll in a new MA plan. Instead, she must wait for the Annual Enrollment Period (AEP), which occurs annually, during which anyone eligible can switch from Original Medicare to an MA plan or make changes to their current plans. This distinction is important for understanding the enrollment rules specific to the different periods available for Medicare beneficiaries.