If you want to make sure your medication is covered, a Medicare Part D formulary check is the key. A formulary is the prescription drug coverage list each plan uses. Many people don’t realise their drug may not be covered under their Medicare plan or may be on a higher cost tier. Doing a Medicare Part D formulary check early can save you big surprises.
What is a Medicare Plan Drug Formulary?
Every standalone prescription drug plan under Medicare Part D has its own list of covered drugs, which is called a formulary.
Here’s what you should know:
- The formulary shows which drugs are covered.
- It also shows drug tiers: lower tiers = lower cost.
- The formulary can change each year (or even mid-year under some conditions).
When you do your Medicare Part D formulary check, you’re comparing your prescription drug coverage list against the drugs you actually take. If your drug is missing or on a high-tier, you may pay more or need a different plan.
Why You Must Do a Medicare Part D Formulary Check Now
If you wait until you fill your prescription, it might be too late to switch or enroll without penalty. These are the key risks:
- Your drug might not be included in your plan’s formulary.
- It might be included, but on a high tier, costing you more.
- Your pharmacy may not be in network, affecting cost or access.
When you run your Medicare Part D formulary check, you take control, you find out early if your drug is covered and how. Then you can either choose a better plan or ask for an exception if needed.
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Step-by-Step: How to Find Your Drug on a Medicare Formulary

Performing a Medicare Part D formulary check can feel complex, but you can do it in a few clear steps:
- Gather your list of prescription drugs: drug name, dose, frequency.
- Go to the official plan comparison tool, such as the Medicare Plan Finder tool.
- Enter your ZIP code, and select “add your prescription drugs.”
- Enter each medication (brand or generic), the dosage, frequency, and preferred pharmacy (if you have one).
- Review plan results, which show:
- Which plans cover your drug list
- Tier levels for each drug
- Estimated annual cost (premiums + deductible + drug cost
If your drug is not listed, you’ll either need to:
- Choose another plan with your drug covered
- Ask the plan for an exception (if your doctor says you need that drug)
By following these steps, you can complete a proper Medicare Part D formulary check and find out if your prescription drug is covered under your current or potential plan.
Understand Drug Tiers: What It Means for Your Cost
In a Medicare formulary, drugs are placed into tiers. These tiers explain how much you pay. Knowing this helps you when you do your check Medicare Part D drug coverage online.
Typical tiers:
- Tier 1: Generic drugs have the lowest cost.
- Tier 2: Preferred brand-name drugs have a moderate cost.
- Tier 3: Non-preferred brand-name drugs have a higher cost.
Specialty tier: High-cost or specialty medications have the highest cost.
When your drug is on a high tier, even though it’s covered, your out-of-pocket cost may be much higher. Doing the Medicare Part D formulary check will tell you the tier and cost impact.
Using the Medicare Plan Finder Tool to Compare Plans
One big advantage of doing a Medicare Part D formulary check is that you can compare across plans using the Medicare Plan Finder tool. Here’s how:
- After you enter your drugs, the tool lists plans by estimated cost, coverage, and pharmacy options.
- You can see which plan offers your drug, at what cost, and from which pharmacy or mail-order.
- You can adjust filters: preferred pharmacy, willingness to use generics, etc.
This way, you’re doing a tool-based, informed comparison. That’s far better than picking a plan blindly. When you’re ready, contact Prime Life Financial to review your top plan options and enroll correctly.
What to Do If Your Drug Isn’t Covered
If your drug doesn’t show up in the plan’s formulary when you perform a Medicare Part D formulary check, here are your next steps:
- Check if there’s a generic version of your drug covered on a lower tier.
- Ask the plan for a formulary exception: your doctor must submit a request, you may pay more, and it’s not guaranteed.
- Consider switching to a different plan during the enrollment period that does cover your drug.
- Talk with a licensed broker/advisor (like Prime Life Financial) to help you review those options.
Doing this ensures you’ve addressed your prescription drug needs before enrolling or renewing your plan.
Timing & Why It Matters
It’s critical to do your Medicare Part D formulary check before or during the enrollment window. For many, that window is October 15 through December 7 each year.
If you wait until after that period:
- You may have to keep your current plan even if it no longer suits you.
- You might face late-enrollment penalties if you delay joining a Part D plan.
Make sure you check annually. Coverage, formularies, and tiers change every year. Your drug list or needs may change, too. Staying proactive keeps you protected.
Conclusion
Doing a Medicare Part D formulary check means you know exactly whether your drug is covered, what tier it’s on, and how much it will cost. You’ve learned how to compare plans, check tiers, use the Medicare Plan Finder tool, and what to do if your drug isn’t covered. Don’t wait until you’re handed a surprise pharmacy bill. Contact Prime Life Financial now, do the check early, make your plan work for you, and get peace of mind for your prescription drug coverage.
FAQs
How do I know if a drug is covered by Medicare Part D?
You check your plan’s formulary by doing a Medicare Part D formulary check, entering your drug into your plan’s list, or using the Medicare Plan Finder to see if it’s covered.
How do I find out if my prescription is covered?
Gather your drug list, go online to enter it into the Plan Finder, or check your plan’s formulary document. Then review the drug list (formulary) to see if your drug is included and note the tier.
Does Medicare Part D pay for all prescriptions?
No. Each plan picks a formulary. Some drugs may be excluded or placed on high tiers, making them more expensive. You must check the plan drug list (formulary).
What drugs are not covered by Part D?
Certain drugs may be excluded by a plan’s formulary, over-the-counter medications, some drugs covered under Part B (instead), or drugs used for weight loss, fertility, or cosmetic reasons. Always check your plan’s list.




