What is the consequence of enrolling in a PDP plan while on a MA-only HMO?

Enrolling in a standalone Prescription Drug Plan (PDP) while being on a Medicare Advantage (MA) plan that does not include drug coverage, such as a MA-only HMO, has specific consequences. When a beneficiary enrolls in a PDP, it is considered a significant change because Medicare Advantage plans that do include drug coverage generally include it as part of the overall plan benefits.

In this case, enrolling in a PDP would lead to the automatic disenrollment from the MA-only HMO plan. This means that the individual would lose the coverage provided by the HMO and the benefits it offers. Therefore, the act of enrolling in a PDP plan effectively replaces the HMO plan entirely for the beneficiary.

It's important for enrollees to understand these implications clearly so that they can make informed decisions regarding their healthcare coverage. Choosing a PDP while already enrolled in an MA only plan without drug coverage fundamentally alters their current enrollment status and the type of plan they are covered under.