Is Mrs. Mulcahy eligible to enroll in a Medicare prescription drug plan while only entitled to Part A?

Mrs. Mulcahy is indeed eligible to enroll in a Medicare prescription drug plan solely based on her entitlement to Part A. Medicare allows individuals who are entitled to Part A, regardless of their enrollment in Part B, to join a Medicare Part D prescription drug plan. This means that her eligibility for enrollment is not contingent upon her participation in Part B.

Enrolling in Part D can provide her with essential prescription drug coverage. It is important to note that while Medicare prescription drug plans are often associated with enrolling in both Part A and Part B, this specific eligibility criteria highlights that having Part A is sufficient for this enrollment pathway.

In contrast, other options present conditions that do not align with the current framework of Medicare eligibility. For instance, the necessity of being enrolled in Part B to join a prescription drug plan is a misconception, as is the requirement of being 65 or older, which is not a stipulation for enrollment if one is entitled to Part A. Additionally, the detail about being only able to enroll during open enrollment does not apply in this case, as individuals entitled to Part A can enroll in Part D during various enrollment periods, not just limited to open enrollment.