1. Why the premium is the wrong first number
A Part D premium is a small, fixed, highly visible number. What your particular medications cost under that plan is a large, variable, almost invisible one. Plans know which number you look at. A plan can advertise a very low premium and recover it several times over through its deductible, its tier placement and its pharmacy arrangements — and none of that is visible until you price your own prescriptions against it.
The result is a pattern we see every January in Broward and Miami-Dade: someone saved twenty dollars a month on premium and is now paying several hundred more a year at the counter, because one medication they take daily moved from a preferred tier to a non-preferred one. They did not choose badly. They compared the wrong column.
The only number worth comparing
Estimated yearly cost, for your drug list, at your pharmacy. It folds the premium, the deductible and your actual copays into one figure. Every other number on the page is a component of it, and any component can mislead you on its own.
2. What changes in 2027
Two figures govern 2027, and both are worth knowing before you look at a single plan.1
- The deductible is capped at $700. No Medicare drug plan may charge more than that in 2027. It is a ceiling, not a price: plans set their own below it, and some charge nothing. A zero-deductible plan is not automatically the cheaper plan, because the difference often reappears in copays.
- Your out-of-pocket spending stops at $2,400. Once your spending on covered Part D drugs reaches that figure, catastrophic coverage begins and you pay nothing out of pocket for covered Part D drugs for the rest of the calendar year.
- Going without creditable drug coverage still carries a penalty. The late enrolment penalty is calculated as one per cent of the national base beneficiary premium for each month you went without, and once it attaches it is generally permanent. Skipping Part D because you take no medication today is a decision with a long tail.
- The word “covered” does more work than people expect. Both figures above apply to covered Part D drugs. A drug your plan does not cover does not count towards the $2,400, which is why the formulary check below matters more than any single price.
That last point is the one worth sitting with. The cap is a real protection against a catastrophic year — but only for drugs your plan actually covers. Choosing a plan that leaves one of your medications off its list does not just cost you that drug’s price; it takes that spending outside the ceiling entirely.
3. Your prescription list is the whole exercise
Before you open any comparison tool, write down every prescription you take: the exact name, the dose, and how often you take it. Brand versus generic matters. Dose matters, because tiers and quantity limits are set per strength. Once you have that list, here is what to check on each plan you are considering — in this order, because the first line decides whether the rest is even worth reading.
| What to check | Why it decides your cost |
|---|---|
| Is every one of your drugs on the list? | If one is missing, the plan is usually out — that cost sits outside the $2,400 ceiling entirely. |
| What tier is each drug on? | Generics sit lowest, preferred brands higher, non-preferred brands higher still. Same coverage, very different bill. |
| Estimated yearly cost for your list | The only figure that folds premium, deductible and copays together. Compare this, not the premium. |
| Deductible, and what it applies to | Some plans exempt the lowest tiers from the deductible. A $0 deductible plan can still be dearer overall. |
| Is your pharmacy preferred, in-network, or out? | The same drug on the same plan costs different amounts at different pharmacies. |
| Any prior authorization, step therapy or quantity limit | A drug can be on the list and still require approval before the plan pays. |
| The plan’s star rating and its service record | Worth a look once the costs are close, not before. |
And check it again next year, whatever you choose. Medicare is explicit that plans can change their drug list at any time, and that your plan must notify you of any change affecting a drug you are taking. A plan that suits you perfectly this year is not a plan that suits you permanently.2
Free, no obligation
Send us your prescription list and we will price it against the plans in your ZIP code.
4. Four rules that block a “covered” drug
Finding your drug on the formulary is necessary but not sufficient. Plans apply rules that sit on top of coverage, and a drug can be listed and still not be dispensed on the day you need it. These are the four you will meet.3
| The rule | What it means at the counter |
|---|---|
| Prior authorization | You or your prescriber must get the plan’s approval before it will cover the drug, usually by showing it is medically necessary. |
| Step therapy | A form of prior authorization: you must first try a cheaper drug on the plan’s list that works for most people with your condition, before moving up to the one you want. |
| Quantity limits | The plan caps how much it covers over a period — for example, thirty tablets a month — for safety and cost reasons. |
| Tier placement | Not a restriction as such, but the quiet one: the same drug on a higher tier simply costs you more, with no notice beyond the plan documents. |
None of these is a reason to panic, and none is unusual. They are a reason to check before you enrol rather than discover in February — particularly step therapy, which can require you to fail on a different medication before the plan will pay for the one you and your doctor already settled on.
5. Your pharmacy is part of the price
This is the part that surprises people most, because nothing about it is intuitive. Where you fill the prescription changes what you pay for it, on the same plan, for the same drug.4
- In-network pharmacies have agreed to offer a discounted price to members of the plan.
- Preferred in-network pharmacies go further: they have agreed to charge less than the other pharmacies in the same network, so your copay is lower again.
- Out-of-network pharmacies usually mean paying the full cost. You can sometimes ask the plan for partial reimbursement afterwards, but you will not get back the out-of-network cost-sharing.
- Mail order can supply up to a three-month supply delivered to your home, often at a lower cost per month for medications you take continuously.
The practical consequence for South Florida: before you enrol, check that the pharmacy you will genuinely use — the one near your house, not the one you could theoretically drive to — is preferred on that plan. If it is merely in-network, price the plan again with a preferred pharmacy and see what the difference is. Sometimes it is trivial. Sometimes it is the whole decision.
6. How to run the comparison in thirty minutes
None of this requires special software. It requires your prescription list and about half an hour. Working in this order stops you being anchored by a premium before you know what anything costs.
- Write down every medication: exact name, dose, and how many you take. Include the ones you only take occasionally.
- Decide which pharmacy you will actually use, and have a second one in mind.
- Go to Medicare.gov/plan-compare and enter your ZIP code, then your drugs and your pharmacy. This is the official tool and it is free.
- Sort the results by estimated yearly cost — not by premium. Ignore the premium column entirely on this pass.
- Open the two or three cheapest on yearly cost and check each drug’s tier, and whether any carries prior authorization, step therapy or a quantity limit.
- Re-run the top candidates against your second pharmacy to see how much the pharmacy choice is worth.
- Only now look at star ratings and the plan’s reputation for service, to separate finalists that are close on cost.
- Enrol before December 7, and keep a note of what you compared — it makes next autumn’s check take ten minutes instead of thirty.
Free help, and no reason to pay for it
Florida’s SHINE programme gives free, unbiased Medicare counselling through the Department of Elder Affairs on 1-800-963-5337. Licensed brokers are paid by the insurance company, not by you. If anyone asks you for a fee to compare plans, that is your signal to walk away.
7. If a drug is not covered
Sometimes the drug you depend on is simply not on the list of the plan that otherwise suits you, or it is listed but blocked behind a rule. You are not stuck with that answer.3
- Ask for an exception. You or your prescriber can ask the plan to cover a drug that is not on its list, or to waive a coverage rule. This is a defined process with deadlines, not a favour.
- Get your prescriber involved early. What usually carries an exception is a clinical statement that the alternatives on the formulary are not medically appropriate for you. That comes from your doctor, not from you.
- Check whether a different form of the drug is covered. A different strength, a generic equivalent, or a different quantity can already be on the list at a lower tier.
- Compare the exception against simply choosing another plan. During Annual Enrollment you have the luxury of changing plans instead of fighting one. In February you will not.
That last line is the argument for doing this work now rather than in January. Between October 15 and December 7 an inconvenient formulary is a reason to pick a different plan. After December 7 it is a reason to file paperwork.
8. Spreading the cost across the year
One option worth knowing about, because it is new enough that many people have not heard of it and it is widely misunderstood. Every Medicare drug plan must offer the Medicare Prescription Payment Plan, which lets you pay your out-of-pocket drug costs in capped monthly amounts spread across the calendar year instead of all at once at the pharmacy counter. It costs nothing to join.5
What it does not do is make anything cheaper. Medicare is blunt about this: the option may help you manage your monthly expenses, but it does not save you money or lower your drug costs. It is a cash-flow tool, not a discount. It helps most if your heavy costs land early in the year — a large January bill spread over twelve months rather than paid in one go.
Who this is and is not for
If a single expensive prescription early in the year would be hard to absorb, this smooths it. If your costs are modest and even across the year, it mostly adds a monthly bill to keep track of. And if your income is limited, look first at Extra Help and the Medicare Savings Programs, which reduce what you owe rather than rescheduling it.
9. Common questions
How do I compare Medicare Part D plans?
Not by premium. Enter the drugs you actually take — each name, dose and quantity — along with the pharmacy you actually use into the plan comparison tool at Medicare.gov/plan-compare, and read the estimated yearly cost rather than the monthly premium. That figure combines premium, deductible and what each of your specific drugs costs on that specific plan. Two plans thirty dollars apart on premium can be many hundreds apart on the year.
When can I change my Medicare drug plan?
Annual Enrollment runs October 15 to December 7, and the plan you pick starts January 1. If you are in a Medicare Advantage plan there is a further window from January 1 to March 31. Outside those, changing usually requires a Special Enrollment Period tied to a life event such as moving or losing other coverage.
What is a formulary?
It is the plan’s list of covered drugs, sorted into tiers. Generics usually sit on the lowest tier and cost the least, preferred brand-name drugs sit higher, and non-preferred brands higher still. Two plans can both “cover” your medication and place it on different tiers, which is exactly how identical coverage produces very different bills.
Can my plan drop a drug in the middle of the year?
Medicare states that plans can change their drug list at any time, and that your plan must notify you of any change to the list that affects a drug you are taking. That is why the letter from your plan matters, and why checking your prescriptions again each autumn is not optional.
What is the Part D deductible for 2027?
No Medicare drug plan may charge a deductible of more than $700 in 2027. That is a ceiling, not a price — many plans set theirs lower, and some charge none at all. A plan with no deductible is not automatically cheaper overall, because it may recover the difference in higher copays on the drugs you take.
Is there a cap on what I pay for prescriptions?
Yes. Once your out-of-pocket spending on covered Part D drugs reaches $2,400 in 2027, you enter catastrophic coverage and pay nothing out of pocket for covered Part D drugs for the rest of the calendar year. It is a genuine ceiling on a bad year, and it is one of the strongest reasons to make sure your expensive drugs are actually on your plan’s list.
Does using a different pharmacy change what I pay?
It can, significantly. Plans have networks, and within a network some pharmacies are “preferred”, meaning they have agreed to charge less than the others. The same prescription on the same plan can cost different amounts at two pharmacies a mile apart. Going outside the network usually means paying the full cost.
What if the plan will not cover my drug?
You or your prescriber can ask the plan for an exception — a decision to cover a drug that is not on the list, or to waive a rule such as step therapy. It is a formal request with a deadline, not a favour, and a prescriber’s statement that the alternative is not medically appropriate is usually what carries it.
10. Sources
- Medicare.gov — How much does Medicare drug coverage cost? States that no Medicare drug plan may have a deductible of more than $700 in 2027, and that once your out-of-pocket spending on covered Part D drugs reaches $2,400 in 2027 you automatically get catastrophic coverage and will not have to pay out of pocket for covered Part D drugs for the rest of the calendar year. It also sets out the late enrolment penalty as one per cent of the national base beneficiary premium for each uncovered month.
- Medicare.gov — How do drug plans work? Advises reviewing a plan’s formulary before joining to check it covers the drugs you take, and states that plans can change their drug list at any time and that your plan must notify you of any changes to the list that affect drugs you are taking. Plan comparison is at Medicare.gov/plan-compare.
- Medicare.gov — Drug plan rules. Defines prior authorization as approval you or your prescriber must obtain before the plan will cover certain drugs; step therapy as a type of prior authorization requiring you to first try a less expensive drug on the plan’s list; and quantity limits as a cap on the amount covered over a period. It also confirms that you or your prescriber can ask the plan for an exception, either to cover a drug not on the list or to waive a coverage rule.
- Medicare.gov — What pharmacies can I use? In-network pharmacies have agreed to offer a discounted price; preferred in-network pharmacies have agreed to charge less than other pharmacies in the plan’s network; out-of-network pharmacies usually cost more and generally mean paying full cost, with no refund of the out-of-network cost-sharing amount. Mail order may supply up to a three-month supply.
- Medicare.gov — What’s the Medicare Prescription Payment Plan? All Medicare drug plans must offer this payment option, there is no cost to participate, and it spreads out-of-pocket drug costs across the calendar year in capped monthly payments. Medicare states that it might help you manage monthly expenses but does not save you money or lower your drug costs, and that it most benefits those with high drug costs earlier in the year.
Disclaimer: JCKC Financial Services is a licensed independent insurance brokerage and tax preparation firm. This article is for general educational purposes only and is not tax, legal, medical, or financial advice, nor a substitute for guidance from a licensed professional about your specific situation. We do not offer every plan available in your area. Any information we provide is limited to those plans we do offer in your area. We are not connected with or endorsed by the United States government or the federal Medicare program. Plan benefits, costs, formularies and pharmacy networks change annually and vary by plan. The 2027 figures given here are the federal parameters and are reset each year. Please contact Medicare.gov, 1-800-MEDICARE (TTY 1-877-486-2048), or your local SHINE counsellor to discuss your options.