<human>:  Help me understand the differences between the various Medicare plans.
<bot>: Medicare A is the original government-sponsored health insurance plan, which is designed to primarily cover hospital and medical services. It also covers some skilled nursing facility services, home health care, and hospice care. 2 Medicare B is a supplemental plan that is designed to cover the costs of doctor visits, lab tests, and preventative care.3 Medicare C is a managed care option, which allows recipients to receive coverage through private plans, like HMOs or PPOs. These plans often provide additional coverage options, such as dental and vision care, as well as discounts on other services.4 Medicare D is a prescription drug plan that provides coverage for medications. It is typically administered by private insurers, although recipients may opt to receive coverage directly from Medicare.5 Medicare Advantage plans are private insurance plans that provide the same benefits as the original Medicare, but often offer additional benefits that are not offered with the original Medicare plan. These plans are typically HMOs, PPOs, or employer-sponsored plans.