How to Evaluate Prescription Drug Costs in a Washington Health Plan

A prescription drug cost analysis for an employer health plan in Washington can reveal more than the pharmacy line on a renewal summary. It can help HR and finance leaders understand how the plan pays for prescriptions, how rebates and fees are treated, which categories drive spending, and what proposed coverage changes may mean for employees. The goal is not simply to find the lowest quoted amount. It is to compare the financial terms and access implications using the same facts.

Book a conversation about your employer plan renewal

Why Should Employers Review Prescription Costs Separately?

Pharmacy spending is often bundled into a broader medical renewal. That makes it easy to miss what changed. A pharmacy-specific review separates at least four possible drivers: the number of prescriptions filled, the types of medicines used, the price paid for each claim, and changes to plan rules or member cost sharing. These drivers call for different questions. More claims, for example, do not mean the same thing as higher cost per claim.

A separate review also helps explain the difference between a quoted gross cost and a plan’s net cost. The report may show claims before rebates, after estimated rebates, or after fees and other adjustments. Each view can be useful, but only if the labels and assumptions are clear. Ask for the definitions before comparing the numbers.

For a Washington employer, the pharmacy analysis should sit alongside the complete plan review. Group size and plan funding affect what information is available and how the proposal is structured. WHIA’s pages for small-group coverage and large-group benefits provide broader context for those employer settings.

What Information Should a Useful Analysis Include?

Begin with a defined period, such as the most recent full plan year available, and request a pharmacy-specific report for that same period. Ask the carrier or pharmacy benefit manager (PBM) to identify what each amount represents. A useful starting package should include:

• Total prescription claims and the amount paid by the plan, with member cost sharing shown separately.
• Claim counts, days’ supply where available, and average cost by generic, preferred brand, non-preferred brand, and specialty categories.
• Gross claim costs and the method used to calculate net costs.
• Rebates, credits, administrative charges, dispensing fees, and any other PBM compensation, with timing explained.
• Pharmacy network, mail-order, and specialty pharmacy arrangements that affect where prescriptions are filled.
• Current and proposed formulary tiers, exclusions, prior authorization rules, step therapy, and exception pathways.
• Separate treatment of prescriptions billed under the pharmacy benefit and drugs administered under the medical benefit, when data is available.
• Projection assumptions, including claim period, population, trend assumptions, and any anticipated plan changes.

Do not send or request identifiable employee health information as a shortcut to understanding costs. Most employer renewal decisions can be discussed using appropriate aggregate reporting. If a report suppresses small counts to protect privacy, ask for an explanation of its categories rather than information that identifies a person.

How Can You Read Utilization Without Confusing It With Price?

Utilization describes how much a benefit is used. Price describes the amount associated with each prescription or unit. A year-over-year increase in total spending can result from one or both. A useful report helps distinguish changes in volume, average paid amount, and the mix of drugs filled.

For example, suppose a report shows that total pharmacy spending increased. Ask first whether the number of claims also increased. If claim volume is similar but spending rose, look at changes in average cost, product mix, specialty use, or the contract’s pricing terms. If both volume and average cost changed, request a breakdown rather than treating one factor as the full explanation. The example is a way to organize the questions, not a benchmark or prediction for a particular employer.

Look at the categories consistently across periods. One vendor might classify a medicine as specialty while another uses a different definition. One report might include 90-day fills as one claim and another might count them differently. Ask the PBM to define the categories and explain any changes in methodology. Otherwise, a comparison can appear to show a trend that is really a reporting change.

Utilization information is most useful when paired with relevant plan terms. If employees are moving from retail fills to mail order, ask whether the report shows the change in both volume and cost, and whether the plan’s rules changed. If generic use changes, ask whether that reflects formulary design, availability, or member behavior; avoid assuming the cause from the summary alone.

How Does PBM Spread Pricing Affect the Review?

A PBM administers some or all of a plan’s prescription benefit. Under spread pricing, the PBM can charge the plan more for a prescription claim than it reimburses the pharmacy, retaining the difference. A report that displays only the plan’s charge may not show the amount paid to the pharmacy or the spread between the two.

Ask whether the proposed arrangement is pass-through, spread-based, or a combination. Then test the label against the contract and reporting. For a pass-through arrangement, ask which amounts are passed through and which fees or other compensation may still apply. Ask whether pharmacy reimbursement is defined in the contract, how it can change, and whether reports allow the plan sponsor to reconcile plan charges with pharmacy payments and fees.

Use concrete questions instead of relying on a single phrase in a sales summary:

• Does the PBM retain any difference between the amount billed to the plan and the pharmacy reimbursement?
• Are dispensing fees and administrative fees included in the quoted price or charged separately?
• Does the contract disclose compensation tied to manufacturers, pharmacies, mail order, or specialty arrangements?
• What claim-level or aggregate data will the employer receive, and how often?
• Does the employer have audit rights, and what records and time periods do those rights cover?

A detailed answer lets an employer understand the financial model. It does not by itself prove that a contract is better or worse. Compare the complete arrangement, including the stated fees, reporting, network, service terms, and coverage design.

What Does Rebate Transparency Tell an Employer?

Rebates are payments or credits associated with some medicines and contractual arrangements. A headline rebate estimate is not the same as a complete net-cost comparison. Ask whether the figure is guaranteed or projected, which claims it covers, when it is earned, and how and when it is credited to the plan.

Reconcile the rebate report with the claims period. A plan may receive cash later than the period in which a claim occurred. That timing can make a current-year claims report look different from a cash-received report. Ask for the reporting period, payment date, and accounting approach, and do not compare an estimate for one proposal with received credits for another as though the figures were equivalent.

Clarify what happens before the credit reaches the plan. Ask whether any administrative charges, offsets, or other amounts are deducted, and whether reporting shows the gross rebate, deductions, and net credit separately. If the PBM calculates rebates across a group of drugs or a larger portfolio, ask what level of detail is available and how the plan’s share is determined.

Finally, consider rebates alongside formulary choices. A product with a larger rebate is not automatically the lowest net cost or the right option for every employee. Ask what clinical review supports preferred-drug placement, what alternatives are covered, and what process applies when a member’s prescriber considers a non-preferred medicine appropriate.

How Should Employers Review Specialty-Drug Exposure?

Specialty medicines can have high per-claim costs and may require additional handling or clinical support. A pharmacy report should show both claim counts and cost by a clearly defined category. A large total alone is hard to interpret: it does not show whether the amount reflects more claims, a higher average price, the category definition, or a small number of high-cost claims.

Ask the carrier or PBM to define “specialty” for the report and for the proposed contract. Find out whether it includes only prescriptions processed through the pharmacy benefit or also medicines billed through the medical benefit, such as drugs administered in a care setting. If the medical benefit is excluded, label that limitation and request a separate view when one is available. This prevents a partial pharmacy figure from being mistaken for all medication-related plan spending.

Cost is only one part of the specialty review. Ask how clinical review works, which pharmacies can dispense the medicines, what support is available to members, and what happens when an employee is already taking a medicine that changes tier or coverage status. For a proposed vendor or formulary transition, request the notice plan, exception route, and continuity process. The employer needs to understand both the projected financial effect and how employees can navigate the benefit.

What Should You Compare in the Formulary?

A formulary lists covered medicines and may group them into tiers with different member costs. Compare the current and proposed versions, not just their summary labels. Look for additions and exclusions, drugs moving between tiers, changes to prior authorization, and new or removed step-therapy requirements. Confirm when changes take effect and how the plan handles requests for exceptions.

Build a concise change list. For each proposed change, record the current rule, the new rule, the stated financial rationale, and the employee-facing process. If a medicine moves to a higher-cost tier, ask how member cost sharing changes. If a product is excluded, ask whether alternatives are covered and how an employee can ask for an exception. Do not assume that a formulary change affects every member in the same way.

Before approving a change, consider the operational work too. HR may need to coordinate enrollment materials, employee notices, and questions during the transition. Ask the carrier or PBM which communications it will provide and when. If the plan change requires employees to take an action, make the action and timing clear in the communication. Financial projections should be reviewed together with these access and administration considerations.

How Can You Compare Proposals on Equal Terms?

Ask each proposer to use the same claims period, population definition, and categories. Request a side-by-side estimate that separates claim costs, member contributions, rebate assumptions, fees, and adjustments. Record whether the projection includes pharmacy claims only or also medical-benefit drugs. Document every difference that cannot be harmonized.

Consider a simple comparison worksheet with a row for each proposal and separate columns for projected gross claims, plan-paid amounts, rebates, fees, estimated net amounts, and coverage changes. Put unknowns in the worksheet instead of treating them as zero. If a rebate is projected but not guaranteed, label it. If one proposal includes a service or category absent from another, write that difference beside the total.

For example, imagine an employer comparing two renewal summaries. Proposal A shows a lower projected net figure because it subtracts estimated rebates, while Proposal B lists gross claim costs and a separate fee schedule. The employer should not infer that A is less expensive yet. Ask both vendors to show the same components for the same period: gross claims, plan-paid claims, member cost sharing, rebates or credits, fees, and any adjustments. Then ask whether the rebate amount is guaranteed, when it is credited, and whether either projection assumes a formulary or network change. If one proposal cannot provide a matching view, keep the unmatched items visible as open questions rather than forcing an artificial total. Next, compare the nonfinancial terms: what reporting is available, whether audit rights are included, how exceptions work, and what employees would experience if coverage rules change. This example uses no assumed savings figure; it illustrates a consistent method for evaluating different presentations. A written comparison can show that the data is incomplete and identify exactly which follow-up questions must be answered before the employer makes a choice.

Do not select the lowest number until you know what it includes. One estimate may subtract projected rebates while another reports costs before rebates. One may use a different pharmacy network or exclude certain claims. Ask for a revised estimate or a written explanation when the comparison cannot be reconciled. The objective is an informed comparison, not a cosmetically uniform table.

Plan funding is another part of the wider discussion, but it does not replace the pharmacy analysis. Employers reviewing a funding approach can use WHIA’s guides to level-funded health plans and how level-funded plans may affect health spending volatility as broader context. A funding comparison still needs clear pharmacy terms and comparable data.

Which Questions Should You Bring to the Renewal Meeting?

Send a shared question list to the carrier, PBM, and benefits advisor before the meeting. Ask for written answers to financial and coverage questions that are not clear from the documents. This makes it easier to compare responses and follow up on missing information.

• What dates and covered population does each pharmacy report represent?
• How are generic, brand, and specialty claims defined, and did the definitions change?
• Is the PBM arrangement pass-through, spread-based, or mixed, and what contract language supports that description?
• What fees, rebates, credits, and other compensation affect the plan’s net cost?
• When are rebates earned and credited, and what deductions or offsets apply?
• Are medical-benefit drugs included in the specialty-cost view?
• What changed in the formulary, member cost sharing, prior authorization, or step therapy?
• What member notice, transition, and exception processes apply to the proposed changes?
• What regular reports and audit rights will the employer receive under the contract?
• Which assumptions drive the projection, and can each proposal be restated on the same basis?

For additional context on employee cost sharing, review WHIA’s guide to comparing health plan out-of-pocket costs. The agency’s employer benefits FAQ and overview of its benefits support are also useful background when preparing for a broader plan conversation. These resources do not replace the PBM contract or claim reporting; use the documents for the terms that apply to your own plan.

What Is a Practical Review Process for HR and Finance?

Divide the work into a few clear stages. First, collect the current contract, renewal summary, pharmacy reports, and proposed coverage changes. Confirm who can answer questions about financial terms, clinical rules, and employee communications. If the documents use different reporting periods, ask for a consistent baseline before interpreting trends.

1. Establish the baseline. Record the claim period, covered population, total claim counts, plan-paid amounts, member contributions, and report definitions.
2. Separate the components. List claim costs, rebates, administrative charges, dispensing fees, and other adjustments as distinct figures.
3. Identify the drivers. Compare volume, average claim cost, category mix, specialty exposure, and formulary changes without assuming one explains everything.
4. Test contract terms. Match PBM descriptions such as pass-through pricing to the written terms, reporting access, and audit provisions.
5. Assess employee impact. Document affected coverage rules, notice timing, exception processes, and support during transitions.
6. Compare proposals consistently. Use the same period and assumptions, mark what is unknown, and request clarification in writing.
7. Record the decision. Capture the cost rationale, trade-offs, unresolved issues, responsible contacts, and next review date.

A short decision record can be more useful than a large presentation. Include the selected option and why it was chosen, the assumptions behind its projected net cost, the coverage changes employees may notice, and any contract terms requiring follow-up. That record gives HR and finance a common reference when implementation questions arise.

Washington employers may also encounter consumer-facing information about Medicare drug coverage while researching online. The Washington Office of the Insurance Commissioner’s health and drug plans page directs Medicare consumers to compare Medicare plans; it is not a guide to employer PBM contracts or group-plan renewal analysis. Keep those separate, and use your group plan documents and vendor reporting for the employer decision.

Frequently Asked Questions

What is spread pricing in a pharmacy benefit?

Spread pricing is an arrangement in which a PBM may bill a plan more for a prescription claim than it reimburses the pharmacy, retaining the difference. Review the contract and reporting to understand whether that applies and how the amounts are disclosed.

Are rebates the same as savings?

Not necessarily. A rebate estimate may have different timing, conditions, or deductions than a credit already received. Ask how the amount is calculated and what portion reaches the plan, then compare it with the complete cost and coverage terms.

Should an employer change its formulary to lower costs?

Cost should be considered alongside clinical review, employee access, member cost sharing, exceptions, and transition support. Ask for the proposed changes and projected effects in writing before deciding whether a design change is appropriate.

What reports should we request before renewal?

Request consistent-period claims and utilization reports, rebate and fee detail, specialty definitions, formulary comparisons, and projection assumptions. Ask the vendor to define categories and protect individual privacy in the reporting.

Does a pharmacy-only report show all medication spending?

Not always. Some medicines may be billed under the medical benefit rather than the pharmacy benefit. Ask what the report includes and whether a separate medical-benefit view is available before treating the pharmacy total as the full medication picture.

Ready to Review Your Employer Plan Renewal?

A documented pharmacy review helps your team understand what the renewal figures include, which questions remain open, and how cost and employee access fit together. Bring the PBM contract, claims reports, rebate details, and proposed design changes to the discussion.

Discuss your Washington employer health plan

With comparable data and clear contract terms, your team can make a more informed renewal decision for the business and its employees.