Before You Switch PBMs, Know What a Smooth Transition Requires
Before You Switch PBMs, Know What a Smooth Transition Requires
More employers are changing pharmacy benefit managers than at any point in recent years. The National Alliance of Healthcare Purchaser Coalitions found that the share of employers using one of the three largest PBMs fell from 63.4 percent in 2025 to 54.3 percent in 2026. Most of that movement came from employers with fewer than 1,000 employees, and 43 percent of respondents said they are considering a PBM change within the next one to three years.
Choosing a new partner gets most of the attention. The transition gets far less, even though that is where members feel the change. One rejected prescription at the pharmacy counter in early January can undo months of careful planning.
The Transition Starts in Your Current Contract
Much of what makes a switch go smoothly depends on the agreement you already have. PBM contracts often run about three years, so the terms that govern your exit may have been set long before anyone considered leaving.
A new PBM will typically need several files from the outgoing one, including historical claims, open prior authorizations, and open refill transfer files. Some PBMs charge fees to release this data, so it helps to know your terms early.
Federal law supports your access. Group health plans may not enter into agreements that restrict them from electronically accessing de-identified claims information.
Where Transitions Usually Break Down
Most member disruption traces back to a short list of details:
- Deductible and out-of-pocket accumulators that do not transfer or sync with the medical plan, especially in an off-cycle switch
- Prior authorizations that the new PBM does not honor
- Mail order and specialty refills that never transfer
- Formulary or pharmacy network changes that were not communicated
Several of these depend on data connections between the new PBM and your medical carrier, which should be confirmed before implementation begins. The PBM's own systems matter too. ProCare Rx, for example, manages its switch alongside its own claims processing platform, so the technology that applies plan rules and the technology that processes claims are built to work together. When something is configured wrong, it can be identified and resolved faster.
What Benefits Leaders Can Do Now
Read the termination and data provisions in your current contract, even if a switch is a year away. Ask what data will be released, in what format, how quickly, and at what cost. Focus member communication on the people most likely to be affected, especially those on specialty or maintenance medications. Then give implementation enough time to test eligibility and accumulator files before members start filling prescriptions.
Plan for visibility after the switch, too. The same National Alliance survey found that employers with full claims-level data access used nearly four more high-value purchasing strategies than those with limited access. A new PBM relationship should expand that access, which is why ProCare Rx offers business intelligence and reporting as a core service.
The ProCare Rx Perspective
A PBM transition is the first real test of a partnership, because members judge the change at the pharmacy counter, not in the contract. If a change is on your horizon, try a simple exercise: request your claims, prior authorization, and open refill files from your current PBM and note how easy they are to get. Then talk with ProCare Rx about what a clean transition plan should include for your members.
Sources:
https://www.cms.gov/files/document/gag-clause-prohibition-compliance-attestation-instructions.pdf
https://innovativerxstrategies.com/successfully-navigating-pbm-implementation/
About ProCare Rx
ProCare Rx is a privately held, independent pharmacy benefit manager (PBM) that has empowered healthcare and self-insured organizations since 1988. We provide fully integrated, in-house solutions—including claims adjudication, clinical program design, pharmacy network access, cost containment, and data analytics—all supported in the U.S. Our flexible, transparent model serves self-insured employers, third-party administrators (TPA), brokers, health plans, health systems, managed care organizations (MCO), unions, workers’ compensation programs, Medicare, Medicaid, hospices, and other PBMs. With a proprietary technology platform, commitment to ethical operations, and a focus on lowest net cost, ProCare Rx delivers long-term value, clinical performance, and trusted pharmacy benefit partnerships.
Media Contact:
Marc Cohen,
SVP, Marketing
marketing@ProCareRx.com










