Which of the following is NOT an eligibility requirement for enrollment in a Medicare Advantage Plan?

In order to qualify for enrollment in a Medicare Advantage Plan, certain eligibility criteria must be met. One of the essential requirements is that individuals must be enrolled in Medicare Parts A and B. This is fundamental because Medicare Advantage Plans are designed to provide additional benefits to those already covered by traditional Medicare.

Another requirement is that beneficiaries must reside within the plan's service area, which ensures that they can access the network of providers and hospitals associated with the Medicare Advantage Plan. Being a U.S. citizen is not a strict requirement, as lawful residents may also qualify for Medicare benefits.

The correct answer indicates that having pre-existing conditions, such as diabetes, is not a barrier to enrollment in a Medicare Advantage Plan. This is vital to understand because Medicare Advantage Plans cannot deny coverage based on an individual's medical history. Thus, while managing pre-existing conditions is important for care and treatment, it does not limit one's eligibility for these plans. This reflects the principles of Medicare's nondiscrimination policies, aiming to make healthcare accessible regardless of existing health issues.