Medicare’s drug benefit (Part D) is outpatient prescription drug coverage for anyone with Medicare. It is available only through private companies.
If you want to get this coverage, you have to choose and enroll in a private prescription drug plan. Enrollment is optional and only allowed during approved enrollment periods. Whether you should sign up for a Medicare private drug plan depends on your circumstances. Some people already enrolled in certain low-income assistance programs may be automatically enrolled in a Medicare drug plan and get financial assistance.