Which plan does not allow for PDP enrollment changes?

The plan that does not allow for PDP (Prescription Drug Plan) enrollment changes is indeed the PDP itself. A Prescription Drug Plan is specifically designed to provide coverage for medications, and enrollment rules are rather strict regarding when you can make changes. Generally, individuals can enroll in, switch, or drop a PDP only during specific periods, such as the Annual Enrollment Period or Special Enrollment Periods, but these changes are not permitted outside of these designated times.

When a beneficiary is enrolled in a PDP, they usually cannot change their enrollment until the next enrollment period, emphasizing the structured and limited nature of enrollment changes for this specific plan. This sets it apart from Medicare Advantage (MA) plans or Part C plans, which can sometimes allow more flexibility regarding changes, particularly during certain periods. Additionally, while Part B is related to medical insurance, it also does not pertain to the management of prescription drug plans like the PDP does.