Prescription Drugs
Preferred Pharmacy
Quick answer
A preferred pharmacy has a special contract with your Part D or Medicare Advantage plan that gives you lower copays on covered drugs compared to a standard network pharmacy.
Plain-English definition
The plan's preferred pharmacy list is usually posted online or in the Summary of Benefits.
Why it matters
Using a preferred pharmacy can cut your annual drug spend meaningfully.
A simple example
A Tier 2 generic costs $2 at a preferred pharmacy versus $10 at a standard pharmacy.
Common mistakes & misconceptions
Related terms
Standard Pharmacy
A standard pharmacy is in your plan's network but charges higher copays than a preferred pharmacy. Your drugs are still covered — you just pay more.
Mail Order Pharmacy
Mail order pharmacies deliver 90-day supplies of maintenance medications by mail, usually at a lower total cost than 30-day fills at a retail pharmacy.
Formulary
A formulary is the official list of prescription drugs a Medicare Part D or Medicare Advantage plan covers, organized by tier. Every plan has its own formulary, and the same drug can be a different tier from one plan to another.
Frequently asked questions
How do I find preferred pharmacies?+
Check your plan's website or pharmacy directory.
Sources & references
📚 Where this information comes from
- Medicare.gov — official U.S. government site for people with Medicare ↗Primary source for benefits, enrollment periods, and plan comparison.
- CMS.gov — Centers for Medicare & Medicaid Services ↗Federal rulemaking, program updates, and official guidance.
- Social Security Administration — Medicare enrollment & premiums ↗Enrollment, premium withholding, and IRMAA determinations.
When you're ready, compare plans on your own terms
See Medicare Advantage plans from the insurance companies we represent, or walk the course with a licensed agent whenever you'd like a second set of eyes.
We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.
Medicare Caddies is an independent insurance agency. We are not affiliated with, endorsed by, or connected to the U.S. government, the federal Medicare program, or the Centers for Medicare & Medicaid Services (CMS). We help compare Medicare Advantage plans from the insurance companies we represent, and we don't offer every plan available in your area.