Is there a limit on the number of drugs a plan will cover in a given year?

Understanding your Formulary · updated Jun 20, 2016

No. There is no limit on the amount of drugs that can be covered. However, each Medicare drug plan will have a list of the specific prescription drugs that it will cover (called a formulary), and not all plans will cover exactly the same drugs.

If your doctor thinks you need a drug that is not on the plan’s list, you can ask the plan for an “exception” to its list.

Plans may cover both generic and brand-name prescription drugs. These drugs must be approved by the FDA (Food and Drug Administration) as safe and effective.

(Source: U.S. Department of Health & Human Services)