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Practice Management Tips

Tier medication list: How drug tiers work

Free PDF • 2 pages, print-ready • Clinician-reviewed

Despina Petrushevska Last updated October 30, 2026 Reviewed by Dr. Vanja Kitanova

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A tier medication list is a drug list that sorts medications into cost-sharing levels, from low-cost generics to high-cost specialty drugs. Patients and clinicians use it to see which drugs cost least and which carry higher out-of-pocket costs. Insurers and Medicare Part D plans build these lists into their formularies. Each plan decides how many tiers it uses and which drugs sit in each one. This guide explains what each tier usually means, how restrictions such as prior authorization apply on top, and where to find a plan's own list. It also includes a free printable checklist your practice can adapt.

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Key takeaways

A tier medication list groups drugs into cost levels set by each plan’s formulary.

Tier 1 generics usually carry the lowest copays, while specialty tiers carry the highest cost-sharing.

Prior authorization and step therapy can restrict drugs regardless of their tier.

In Pabau, the practice management platform we build, each patient’s medication details and review notes sit in one record.

What is a tier medication list?

A tier medication list is the tiered section of a formulary that assigns each covered drug to a cost level. Plans use tiers to signal how expensive a drug is for the insurer and how much the patient pays at the pharmacy.

In clinical settings, the same list shows prescribers and practice teams which medications a patient can likely get without extra steps. In addition, it flags the drugs that will need a conversation about cost or alternatives.

How drug tiers work in a formulary

Each plan builds its own formulary and decides how to divide its tiers. For example, Medicare.gov notes that each plan can divide its tiers in different ways, so the same drug can sit in different tiers across two plans.

However, tier placement varies by plan, so always check the plan’s own list before you advise a patient on cost.

Tier 1 to Tier 5 explained

Tier 1 generic drugs

Tier 1 holds the lowest-cost generic drugs. As a result, patients usually pay the smallest copay here, which makes it the first place to look when cost is a barrier.

Tier 2 preferred brand-name drugs

Tier 2 usually holds preferred brand-name drugs or higher-cost generics. Specifically, cost-sharing here is moderate, and the plan has chosen these options as preferred alternatives.

Tier 3 non-preferred brand-name drugs

Tier 3 holds non-preferred brand-name drugs, which generally cost the patient more than Tier 2. Therefore, clinicians often check for a preferred alternative in Tier 1 or Tier 2 before the patient leaves the appointment.

Tier 4 and Tier 5 specialty drugs

Specialty tiers hold high-cost biologics, injectables and infusion drugs. In fact, these drugs often need special handling or administration, which is why they tend to carry the highest cost-sharing.

Medicare drug tier structure

Medicare Part D plans use tiered formularies, and CMS sets the rules that plans follow. Overall, many plans use five tiers, though the number and make-up of tiers can differ from plan to plan.

Because cost-sharing rules and tier placement change from year to year, check the current Medicare drug plan finder before quoting any figure to a patient. Indeed, Medicare.gov is the authoritative source for plan-specific details.

How to read a prescription drug tier list

Start by finding the drug name on the list, then read across to its tier and any restrictions beside it. First, a drug’s tier tells you the cost level, while its restrictions tell you what has to happen before a claim is paid.

1. Locate the drug: Search by generic name first, since brand names can list separately.
2. Note the tier: Then record the tier number and the plan year the list covers.
3. Check restrictions: Look for prior authorization, step therapy or quantity limits. In fact, many plan lists flag them with short codes such as PA, ST and QL.
4. Confirm the cost: Next, use the plan’s cost-sharing schedule for the actual copay or coinsurance.
5. Document the result: Finally, record the tier and any restriction in the patient file.

Special rules that affect drug tier access

Tier placement is only one layer of access. Prior authorization, step therapy and quantity limits can apply to a drug in any tier, as the diagram below shows.

• Prior authorization: The plan requires approval before it covers the drug. However, rules differ by payer.
• Step therapy: The plan requires trying a preferred drug first. Additionally, state rules can affect how this applies.
• Quantity limits: In contrast, the plan caps the amount dispensed per fill or per period.

Generic vs. brand-name drugs by tier

Generic drugs usually sit in Tier 1, and brand-name drugs usually sit in higher tiers. Indeed, FDA bioequivalence standards support generic substitution, but clinical judgement still applies to each patient.

Tier placement drives the cost gap between the two, so compare the patient’s copay for each option before deciding on a switch. For instance, extended-release versions often appear as separate entries, and a medication suffix list helps staff match the exact product to the plan entry.

Who uses the template

Specifically, pharmacists, nurses, prescribers and practice managers use this kind of list to keep medication records consistent. Overall, primary care, internal medicine and specialist practices all handle tiered drug questions at the point of prescribing.

The check goes faster when patients bring a current medication list to the appointment.

Why a standard checklist helps

A standard checklist makes medication records comparable across patients and staff. Its header ties each list to one patient by name, date of birth and record number. In addition, the prepared-by and date fields show who compiled it and when.

The form has no dedicated tier or review-date columns. Instead, write the plan name, each tier and the next review date into an item row or onto the notes page yourself.

How to build your practice’s own tier list

Build your list from the medications your practice prescribes most often. Pull each tier from the plans your patients use, then review the list on a fixed schedule. Run it alongside your medication reconciliation form so the list matches the drugs each patient currently takes.

1. Export the most-prescribed medications from your records.
2. Then look up each drug’s tier on the plan formularies your patients hold.
3. Next, write each drug’s tier, any restriction and the plan year into an item row or the notes page.
4. Finally, note a review date and an owner for each update.

How Pabau keeps medication lists with the patient record

A printed tier list in a binder, or a spreadsheet on a shared drive, drifts out of date fast. As a result, nobody can tell which copy the prescriber checked at the last visit.

Pabau, the practice management platform we build, stores medication details in each patient’s medical records. Notes, forms and appointments sit in the same file, so the tier note never lives on a loose sheet.

You can also rebuild this checklist as a digital form. The forms behind Pabau’s intake software for practices can capture the tier, plan year and next review date on screen. As a result, at the next appointment, the prescriber sees the last recorded tier and the date it was checked.

Keep medication lists with the patient record

Pabau stores medication details, forms and review notes in one patient record. Prescribers see the latest tier note before they write a prescription.

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Conclusion

A tier medication list is only as useful as the date on it. Plans move drugs between tiers from year to year, so check any undated list against the plan’s current formulary before you quote a cost.

Start with the drugs your practice prescribes most, and record each tier and restriction next to the plan year. The trade-off is upkeep. Otherwise, a list nobody reviews will mislead a patient about cost, so give it an owner and a review date.

Book a demo to see how Pabau keeps medication notes and review dates inside each patient record.

Continue your research

Writing the prescription next? Prescription pad template gives you a printable pad with the fields a prescription needs.

Tracking drugs bought without a prescription? OTC medication list records the over-the-counter products a patient takes alongside prescribed drugs.

Flagging drugs that need extra checks? High-alert medication list lists the medications where an error carries the most risk.

Logging doses over time? Medication log tracks each dose given, with dates and times.

Keeping a pharmacy-side record? Pharmacy record documents dispensing details for each patient.

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