Which of the following statements is true regarding Medicare Part D?

Medicare Part D is indeed only available through private insurers, making this statement true. This program is specifically designed to help individuals with Medicare pay for prescription drugs, and it operates through a network of private companies approved by Medicare. Each insurer offers different plans with varying coverage options, costs, and formularies.

The nature of Medicare Part D as a private insurance product is crucial as it allows beneficiaries to choose from a range of available plans, tailoring their coverage to their specific medication needs. Government regulation ensures that these plans meet certain standards, but the execution and management of these plans are handled by private companies.

Understanding this is essential in recognizing the broader context of Medicare, which includes Parts A, B, C (Medicare Advantage), and D. Other statements regarding enrollment and availability need further clarification. For instance, enrollment in Part D is not mandatory, and coverage does not automatically become available upon Medicare enrollment, indicating the importance of choosing a plan based on individual prescription needs. The ability to have standalone plans or part of a broader Medicare Advantage plan also adds to the flexibility but is not inclusive of the enrollment method inherently being automatic.