Your exact drug list
Dose and quantity change the tier maths. A 90-day fill is often priced differently from three 30-day fills.
Medicare Part D
Part D prescription cover
The cheapest Part D plan is almost never the cheapest plan for you. What matters is where your drugs sit on the formulary, whether your pharmacy is preferred, and what the plan does across the coverage stages.
What this actually is
Part D plans place every covered drug on a tier. Preferred generic, generic, preferred brand, non-preferred brand and specialty are the usual five. The same medication can sit on tier two in one plan and tier four in another, which is how two plans with similar premiums produce very different annual costs.
Costs also move through coverage stages across the year: an annual deductible if the plan has one, then the initial coverage stage, then catastrophic coverage once your true out-of-pocket spending crosses the threshold. Knowing which stage you will be in by July changes which plan wins.
Pharmacy matters too. Plans have preferred and standard network pharmacies, and the difference at the counter can be real money on a maintenance drug. We check the pharmacy you actually walk into.
What we do on this line
- Every prescription entered with dose and quantity, not just the drug name
- Tier placement compared across the plans available to you
- Preferred versus standard pharmacy pricing at the pharmacy you use
- Coverage stage modelling so you can see the whole year, not just January
- Prior authorisation, step therapy and quantity limit flags before you enrol
- Late enrolment penalty explained if you delayed drug coverage without creditable cover
What moves the number
Price is not random. These are the levers, in the order they usually matter.
Brand versus generic
One brand-only maintenance drug can decide the plan by itself.
Pharmacy choice
Preferred network pricing is not a rounding error on a maintenance drug.
Creditable coverage history
Gaps without creditable drug coverage can create a permanent late enrolment penalty.
How the appointment runs
- 01
Collect
Bring the bottles or the pharmacy printout. Dose and quantity, not just names.
- 02
Model
We run the list against the plans and project the full year across the coverage stages.
- 03
Check
Pharmacy network, prior authorisation and step therapy on each drug that has them.
- 04
Re-run
Every autumn, because formularies change on January 1 even when your prescriptions do not.
The part nobody explains
Coverage stages and formulary tiers
Deductible
You pay the full negotiated price until the plan's annual deductible is met. Some plans have no deductible at all, and some apply it only to higher tiers.
Initial coverage
You pay a copay or coinsurance by tier and the plan pays the rest, until total drug spending reaches the plan's initial coverage limit.
Catastrophic coverage
Once your true out-of-pocket spending crosses the annual threshold, your share of covered drugs drops sharply for the rest of the calendar year.
Scroll the table sideways to see every column.
| Tier | What sits here | Your share | Note |
|---|---|---|---|
| Tier 1 | Preferred generic | Lowest copay | Most maintenance drugs land here if a generic exists. |
| Tier 2 | Generic | Low copay | Generics the plan has not designated as preferred. |
| Tier 3 | Preferred brand | Higher copay | Brand drugs the plan has negotiated on. |
| Tier 4 | Non-preferred drug | Coinsurance, often | Where an unnegotiated brand lands. Watch this tier. |
| Tier 5 | Specialty | Coinsurance | High-cost drugs. Can decide a plan choice by itself. |
Tiers, costs and rules are set by each plan and change every plan year.
Questions we get about part d prescription cover
Formularies are refiled every year. A drug can move tiers, a plan can add prior authorisation, or your dose can change. That is why the autumn re-run exists.
If you go without creditable prescription coverage after you are first eligible, a penalty can be added to your Part D premium and it generally lasts for as long as you have Part D. If you delayed because you had employer drug coverage, keep that letter.
Usually you change during the Annual Enrolment Period, October 15 to December 7. Some situations open a Special Enrolment Period, such as moving out of the plan's service area or a change in Extra Help status.
Yes. Leaving off the expensive one is the single most common reason a comparison comes out wrong.
Often bought alongside
Medicare Advantage
Part C plans that bundle hospital, medical and usually drug coverage inside a carrier network.
Read the detailMedicare Supplement (Medigap)
A standardised plan that pays the gaps Original Medicare leaves, with no network and predictable costs.
Read the detailDental, vision and hearing
Standalone cover for the three things medical plans mostly do not pay for.
Read the detailTwenty minutes usually settles it
Bring your prescriptions, the doctors you want to keep and a rough income number. We do the rest.
Our help is free to you. We are paid by the carrier you choose, and the premium is the same whether you use us or enrol on your own.