Separating pharmacy benefits from a medical plan changes more than the name on a contract. It can affect who administers prescriptions, how plan data is coordinated, and where employees turn for help.
When evaluating a pharmacy carve out health plan, Washington employers are considering a separate contract with a pharmacy benefit manager (PBM) to administer prescription benefits. That structure can create a different set of oversight and coordination responsibilities, so it is an option to assess against the current arrangement, not a guaranteed cost improvement.
Milliman distinguishes this from a carve-in, where the employer contracts with the medical-plan vendor for both medical and pharmacy benefits. Whether it administers pharmacy services itself or through a PBM (Milliman’s carve-in and carve-out overview). For Washington employers, the useful starting point is understanding exactly which contracts and responsibilities would change.
What Is a Pharmacy Carve-Out in a Health Plan?
A pharmacy carve-out describes how an employer arranges and administers prescription benefits separately from its medical plan. The defining difference is not simply which company processes a prescription claim. It is the contract relationship: who the employer hires for pharmacy benefits and how that work is organized.
Carve-in: pharmacy benefits stay with the medical-plan arrangement
In a carve-in, the employer contracts with its medical plan vendor for both medical and pharmacy benefits. That vendor may administer the pharmacy program itself or hire a pharmacy benefit manager (PBM) to handle it. If it uses a PBM, the PBM may process claims behind the scenes, but the employer’s direct contract remains with the medical-plan vendor. Milliman describes this as a combined medical and pharmacy arrangement without a direct employer-PBM relationship.
Carve-out: the employer has a separate PBM contract
With a carve-out, the employer contracts directly with a PBM to administer the pharmacy benefit. A PBM can process prescription claims, determine coverage eligibility and cost-sharing, and manage pharmacy networks, including retail, mail-order, and specialty pharmacies. The medical plan vendor continues to handle its own medical-plan responsibilities, while pharmacy administration is assigned through the separate PBM relationship. The two vendors therefore need clear responsibilities and coordination rather than one combined contract. Nixon Peabody likewise characterizes a carve-out PBM as operating under a separate contract.
This structure is typically associated with self-funded plans, where the employer assumes the claims risk, but that is a common arrangement, not a requirement. A carve-out is also possible with fully insured coverage, although it is less common, according to Milliman’s overview of carve-in and carve-out programs.
In short, seeing a PBM name on a benefit card or claim document does not by itself tell you whether pharmacy benefits are carved out. Review the plan and vendor agreements to identify who holds the contract, who performs the work, and how pharmacy administration connects with medical coverage. That distinction gives an employer a clearer starting point for evaluating its current arrangement.
How Should Employers Evaluate a Pharmacy Carve Out Health Plan?
A separate pharmacy arrangement may merit evaluation when renewal is approaching, current pharmacy costs are difficult to explain, or the employer wants to understand how rebates are handled. These are reasons to ask better questions, not proof that separating pharmacy benefits will improve the plan. Start by establishing what the current arrangement costs and whether rebates are passed through. Also ask whether the medical plan vendor would raise its fees if pharmacy services moved to a separate contract. The total comparison should include those added costs, not just the proposed pharmacy terms.
Contract timing matters. Review the current agreement’s end date and any fees or conditions tied to changing vendors. A renewal or planned request for proposals can create a practical point to compare arrangements, including whether pharmacy and medical contracts should be reviewed together. Milliman identifies current costs, rebate treatment, contract end dates, RFP timing, and possible medical-vendor fee increases as questions for employers to examine (Milliman’s carve-in and carve-out overview).
Can your team oversee a separate relationship?
A carve-out creates a direct relationship with a pharmacy benefit manager (PBM), so consider who will manage the added vendor coordination and review its work. If HR or benefits staff already have limited capacity, identify what outside decision support may be needed before launching a search. The arrangement should fit the employer’s ability to oversee it, not just its interest in a different contract structure.
What matters most: cost visibility or coordination?
Some employers may value a separate contract’s ability to invite bids from multiple PBMs or make pharmacy terms easier to examine. That does not establish that a carve-out will lower total plan costs. A medical-plan vendor may increase its own fees, and the employer still needs to weigh operational coordination and employee service priorities. If keeping medical and pharmacy benefits coordinated through one vendor is especially important, include that preference in the evaluation rather than treating cost as the only criterion.
For broader context on employer cost decisions, see these healthcare cost-containment strategies. If the structure is worth exploring, the separate guide to transparent PBM contract terms can help with contract questions; it addresses transparency, while this decision is whether pharmacy benefits should be contracted separately at all.
What Changes When Pharmacy Benefits Are Carved Out?
The main change is who contracts for the pharmacy benefit and how that relationship connects with the medical plan. A carve-in keeps medical and pharmacy benefits within the employer’s contract with the medical-plan vendor. A carve-out creates a direct contract between the employer and a pharmacy benefit manager (PBM). Neither structure guarantees a better result. The practical trade-off is between a more consolidated arrangement and a separate relationship that may offer different oversight and coordination options.
Compare the operating model, not just the labels
Use the comparison below as a starting point. Actual contract terms and vendor responsibilities vary, so confirm what each proposal includes rather than assuming every carve-in or carve-out works the same way.
| Decision area | Carve-in | Carve-out |
|---|---|---|
| Contract relationship | The employer contracts with the medical-plan vendor for medical and pharmacy benefits. That vendor may administer pharmacy services itself or use a PBM; the employer may not have a direct PBM contract. | The employer contracts directly with a PBM to administer pharmacy benefits, under a separate agreement that may be with a provider unaffiliated with the medical plan administrator. |
| Administration and coordination | One vendor relationship can simplify administration, with potential for closer coordination between medical and pharmacy benefits. | Separate vendors can mean more coordination work across eligibility, claims, service responsibilities, and reporting. The employer should identify who owns each handoff. |
| Transparency and data | A combined contract may provide more limited transparency or audit rights, depending on its terms. | A direct PBM agreement can define specific audit rights, such as claims, operational, or rebate audits. Access still depends on the contract and data processes. |
| Employee experience | Keeping benefits together may support coordination, but it does not by itself establish how a member’s medication or service will be handled. | A change in PBM may bring a different formulary. A medicine preferred under the current formulary could be non-preferred under the new one, so review potential member disruption before a transition. |
| Likely decision fit | May fit an employer that prioritizes a consolidated vendor relationship and wants simpler administration, subject to the contract’s terms and oversight provisions. | May fit an employer prepared to manage a separate vendor relationship and evaluate its oversight, data access, and coordination requirements. |
These are tendencies, not universal outcomes. Industry guidance notes that carve-ins can simplify administration and support coordination, while combined contracts may limit transparency or audit rights; it also identifies potential carve-out audit rights. A separate arrangement can introduce extra work, and a medical administrator may raise its fees after pharmacy services are removed. Review total responsibilities and fees together rather than treating the new PBM contract in isolation. Milliman’s carve-in and carve-out comparison describes these structural trade-offs.
Employee impact also depends on the plan design and transition details, not only the contract structure. If the proposals use different formularies, identify affected prescriptions and determine what transition support is available. Compare the current and proposed arrangements on administration, oversight, member impact, and total cost before deciding whether a separate contract is worth evaluating further.
Which Contract, Cost, and Data Questions Should You Ask?
Do not compare a PBM quote with a medical plan’s bundled price until you know exactly what each figure includes. A separate pharmacy agreement can create a direct relationship with the PBM. But it also makes it important to account for the medical administrator’s role and any services that remain bundled today. Build the comparison around the full arrangement, not one headline fee.
Map the services and every fee
Ask each vendor to list included and excluded services in writing. Confirm who handles claims, eligibility, utilization management, member support, reporting and rebate administration, and identify any work that will stay with the medical administrator. Request the PBM’s service and claims fees, pricing structure, rebate terms and guarantees, along with any implementation, interface, or reporting charges. Ask the medical vendor whether its fees will change if pharmacy benefits are removed. A carve-out can affect its charges, so include those costs in the same estimate. PBM evaluations also consider utilization management, formulary management, member services and pricing guarantees, not just the base service fee (Nixon Peabody’s PBM contracting overview; Milliman’s carve-in and carve-out framework).
Test whether the financial terms are measurable
For each guarantee, ask how it is calculated, what claims or members are excluded. Which period it covers, how exceptions are handled, and what remedy applies if the target is missed. Clarify whether rebates are passed through, how they are reported, and whether the employer can verify amounts. Ask for access to claims data and the right to examine relevant manufacturer agreements. Possible audit areas include claims, operations and rebates; write the data fields, delivery schedule. Permitted uses and audit procedure into the agreement rather than relying on a verbal assurance.
Also check the current contract’s renewal date, notice deadline, termination or transition charges, and any fee triggered by changing the pharmacy arrangement. Add costs for data interfaces, file transfers and coordination between vendors. Estimate total expected cost across the same stated period and assumptions, including both PBM and medical-administrator charges. Milliman specifically recommends checking current pharmacy costs, rebate treatment, contract timing and possible medical-vendor fee increases before deciding whether to carve out.
Make bids comparable, then keep the record
Give every bidder the same complete requirements and plan information. Compare like-for-like service scope, direct and indirect compensation, pricing, rebate treatment and performance terms; then check that the final contract matches the RFP and the vendor’s written response. The Department of Labor describes identical information, careful review of services and fees, and documenting the decision process as general fiduciary practices. Its guidance is not a pharmacy-specific rule; employers should consult qualified ERISA counsel about how requirements apply to their plan. Record the assumptions, trade-offs, selected terms and reasons for the decision, then periodically check actual fees and performance against the agreement.
How Can Employers Protect Employee Access During a Transition?
A pharmacy benefit change is not just a contract handoff. Employees may rely on a specific drug, pharmacy, refill schedule, or coverage rule, so map likely points of disruption before the transition date. The goal is to identify what could change, decide who will resolve issues, and give members clear instructions before they need to fill a prescription.
Start with a review of the incoming formulary against the current one. A medication treated as a preferred brand today may be non-preferred under the new formulary, changing its coverage or member cost. Ask the incoming pharmacy benefit manager (PBM) to identify affected participants and explain whether it can offer a transition supply, exception process, or other accommodation. Do not promise uninterrupted access; confirm the exact terms, eligibility, time limits, and steps in writing. The guide to employer health plan formulary changes covers how formulary decisions can affect employees.
Nixon Peabody describes how formulary differences can affect participants and recommends confirming whether a new PBM can transition or grandfather those who would be disrupted.
Check eligibility, claims, and pharmacy access
Confirm that the new PBM’s retail, mail-order, and specialty pharmacy networks include the channels employees currently use, and explain any network or enrollment changes. Coordinate the transfer of eligibility files and open mail-order refills early enough to check and test the data. MedPAC notes that eligibility and mail-order refill transfers are particularly time-sensitive. Errors can lead to a prescription coverage rejection or prevent a pharmacy from dispensing an open refill without a new prescription. See MedPAC’s discussion of prescription data transfers.
Before launch, test eligibility records, benefit coding, and representative claims against the documented plan design. Check deductibles, cost sharing, and any applicable accumulators, including how pharmacy activity is coordinated with medical-plan records. Confirm who corrects a file mismatch or claim rejection and how quickly employees can reach that support team. Milliman includes formulary review, eligibility-file testing, claims validation, customer-service training, and post-launch monitoring among PBM implementation steps: PBM transition and implementation guidance.
Give employees useful, timely instructions
Communications should explain what is changing, when the new benefit takes effect. Where to check drug coverage and network status, and what to do if a prescription or refill is denied. Identify whether members need to move a prescription, enroll in mail order, update a pharmacy, or contact a clinician. Provide a named contact path for questions and make sure HR, the medical administrator, and the PBM give consistent answers. Review notices for accuracy and avoid saying that every current medication or pharmacy will remain covered. Confirm actual plan and transition terms with the vendors, then monitor questions and claims after launch so problems can be routed and resolved.
What Should an Employer Put in the Implementation Plan?
A separate pharmacy contract changes more than the name on a member card. Treat the transition as a coordinated project involving the employer, medical plan administrator, pharmacy benefit manager (PBM), and any advisors supporting the plan. The plan should name accountable people, capture decisions, and make clear how readiness and early performance will be checked. Milliman describes an implementation plan as a project plan that maps key items, owners, and timelines, without assuming every employer follows the same calendar (Milliman implementation guidance).
- Assign an owner and build the work plan. Designate one employer-side project lead and identify decision-makers and contacts at each vendor. Record responsibilities, dependencies, target dates, approvals, and escalation paths. Keep a decision log so the rationale and open issues are visible. The U.S. Department of Labor (DOL) advises documenting fiduciary decisions and their basis; consult qualified ERISA counsel about plan-specific responsibilities and decisions (DOL fiduciary guidance).
- Reconcile the contract with the plan design. Before configuration begins, compare the signed agreement, benefit specifications, and intended plan terms. Confirm who owns each task across the PBM and medical administrator, including eligibility and claims-data interfaces, member support, and reporting. Resolve discrepancies in writing and define how changes will be approved. If the plan is self-funded, assess stop-loss coverage separately; it is a risk-financing consideration, not the pharmacy carve-out itself. See this guide to stop-loss insurance for Washington self-funded employers.
- Arrange and validate data transfers. Agree on which prior-vendor files are needed, who may send and receive them, the approved secure transfer method, and how receipt and completeness will be confirmed. Plan for eligibility, claims, and open refill information as applicable. Early transfer allows time to check and test files; errors in eligibility or refill data can disrupt prescription access (MedPAC discussion of transition data).
- Configure benefits and test realistic cases. Load eligibility, verify benefit coding against the agreed specifications, and test representative claims before go-live. Include cases that exercise different coverage and cost-sharing outcomes, then document expected versus actual results and resolve mismatches. Review the formulary and service setup as part of readiness. Milliman identifies eligibility testing, benefits coding, claims validation, and formulary review as implementation-plan items (PBM transition guidance).
- Prepare employees and the helpdesk. Review notices for accuracy and plain language, explain where members can get help, and train customer-service staff on the new arrangement and escalation process. Coordinate communications so employees know what to do if a pharmacy rejects a claim or a refill needs attention. Confirm that the support team knows who can resolve eligibility, coverage, and transition questions.
- Monitor the launch and audit the setup. Set a review cadence with vendors, monitor paid and rejected claims, and route emerging issues to an owner for resolution. After implementation, compare actual plan setup and claims processing with the contract. DOL recommends periodically reviewing provider performance, reports, actual fees, and participant complaints, then documenting follow-up (DOL provider-monitoring guidance).
A Decision Checklist for Washington Employers
A pharmacy carve-out should solve a defined plan problem, not simply create another vendor relationship. Before deciding, confirm how pharmacy benefits are currently contracted and administered, then compare the existing arrangement with a clearly scoped alternative.
Proceed to a detailed comparison when
- The current structure is clear. Identify which organization handles pharmacy claims, coverage rules, member support, and coordination with medical benefits. Confirm that a proposed separate PBM contract would have defined responsibilities and working interfaces.
- You can compare net total fees. Include the new PBM’s fees, any change in medical-administrator charges, implementation or exit costs, and the treatment of rebates and other compensation. Ask bidders to price the same services using identical plan information, as the Department of Labor recommends. Cost matters, but it is one factor alongside service and coverage. DOL guidance on selecting and monitoring service providers
- Data rights and employee access are workable. Verify access to usable claims and plan data, audit rights, pharmacy networks, coverage rules, and member support. Consider specific coverage decisions, such as GLP-1 coverage under employer health plans, as examples of issues employees may notice. CMS RxDC reporting includes prescription spending, rebates, premiums, and cost-sharing, but those reporting data do not replace a plan-specific comparison. CMS RxDC overview
Pause or compare further when
- Your HR team lacks capacity to oversee another vendor, or service ownership between the medical administrator and PBM is unclear.
- The current contract’s renewal date, termination provisions, or transition charges make the timing uncertain. Review the actual documents before setting a change date.
- The comparison excludes fees, services, or employee impacts, or relies on assumptions that cannot be verified. Seek qualified benefits and legal advice where appropriate.
Whether you proceed, retain the current structure, or defer a change, record the alternatives reviewed, the information considered, the trade-offs, and the reason for the decision. DOL guidance emphasizes documenting the decision-making basis and periodically reviewing provider performance and costs. DOL guidance on fiduciary responsibilities
Talk through your employer health-plan options with Washington Health Insurance Agency (WHIA).
Frequently Asked Questions
How is a pharmacy carve-out different from a carve-in?
With a carve-in, the employer contracts with its medical plan vendor for both medical and pharmacy benefits. With a carve-out, the employer contracts directly with a pharmacy benefit manager (PBM) to administer pharmacy benefits. The separate contract changes who manages the pharmacy program; it does not, by itself, change the plan’s coverage decisions. Milliman describes these arrangements.
Can a fully insured employer use a pharmacy carve-out?
It is possible, although carve-outs are more commonly used with self-insured plans. Before pursuing one, ask the insurer how separating pharmacy administration would affect the medical contract, fees, data exchange, and responsibility for member support. The arrangement needs to work with the specific plan and its vendors. Milliman discusses carve-outs under both funding models.
Will carving out pharmacy benefits lower the plan’s costs?
Not automatically. Compare the current arrangement with a complete carve-out proposal over the same period and for the same covered population. Include PBM fees and pricing terms, rebates, medical-vendor fee changes, implementation or transition charges, and any added administration. Review the full cost alongside coverage and service differences rather than treating a bid or guarantee as the net result.
How can employers protect employees’ pharmacy access during a transition?
Compare the current and proposed formularies, pharmacy networks, and member-service processes before the change. Identify prescriptions that could face a coverage or cost-sharing change, and ask the incoming PBM what transition or grandfathering support is available. Test eligibility files and claims before launch, then give employees clear instructions for getting help. Nixon Peabody discusses formulary disruption and transition options.
Ready to Evaluate Your Pharmacy Benefit Options?
A pharmacy benefit structure should be considered alongside your plan’s administration, contract terms, and employee needs. A measured review can help your team identify which questions deserve closer attention without assuming that a separate arrangement is the right fit. To discuss evaluating pharmacy benefit options for your Washington employer health plan, book a conversation with Washington Health Insurance Agency (WHIA).