1. List of drugs shown in therapeutic or disease categories. 2. In some insurance plans, managed care plans, or Medicare Part D plans, providers are limited to prescribing medications to members from a list of drugs and dispensed through pharmacies participating in the plan. Most plans’ formularies include the most common drugs prescribed for seniors. Also called drug formulary, preferred-drug list (PDL) , or select drug list .
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–A list of drugs that are covered by a particular insurance plan. Formularies often contain different tiers of coverage between which levels of coverage and out-of-pocket expenses can vary considerably.