Prescription Drugs
Mail Order Pharmacy
Quick answer
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.
Plain-English definition
Not every drug is eligible; controlled substances and certain specialty drugs are typically excluded.
Why it matters
For chronic conditions, mail order saves time and money.
A simple example
Your blood pressure medicine arrives every 90 days for one 90-day copay.
Common mistakes & misconceptions
Related terms
Preferred Pharmacy
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.
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.
Medicare Part D
Medicare Part D is prescription drug coverage sold by private insurance companies approved by Medicare. You get it either as a stand-alone drug plan (PDP) with Original Medicare or bundled inside most Medicare Advantage plans.
Frequently asked questions
Is mail order safe for insulin?+
Yes with temperature-controlled shipping — confirm with the pharmacy.
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.