Plan sponsors are being asked to operate in a new and changing environment, as regulatory pressure from the Consolidated Appropriations Act (CAA) has accelerated demands for PBM transparency and fiduciary accountability. At the same time, market forces continue to push pharmacy costs higher and make benefit contracts more complex.
The good news is, plan sponsors can take action to set themselves for long-term success. With more pharmacy claims and performance data flowing their way than ever before, they will have the responsibility to validate what they’re being charged, enforce contract terms, and hold their PBMs accountable.
That’s where employers can deploy two distinct (but complementary) programs: ongoing oversight and formal pharmacy audits.
Pharmacy Claims Oversight: Continuous Monitoring and Transparency
Pharmacy benefits oversight refers to the continuous, independent monitoring of pharmacy claims as they are processed by your Pharmacy Benefit Manager (PBM), and its importance starts with a core reality: even well-structured PBM contracts are not always executed perfectly.
Because of the sheer complexity of pharmacy contracts and the potential for shifting terms and policies, discrepancies can and do occur across pricing, rebates, or hidden within aggregate calculations. The result is that small errors, misconfigurations, or inconsistencies can quietly accumulate into meaningful financial performance gaps. Without independent validation, these issues may go undetected.
Pharmacy benefits oversight is what makes PBM performance observable and verifiable within a plan year.
Rather than relying only on periodic reporting from the PBM or year-end reconciliation, third-party oversight evaluates claims against contract terms on an ongoing basis, identifying discrepancies between expected performance and actual results as they occur.
The focus is on transparency and early detection:
- Pricing accuracy and utilization
- Contract compliance against guarantees
- Emerging discrepancies or contract term shifts
While some plan sponsors may refer to oversight as a type of audit for their plan performance, establishing an ongoing oversight program ultimately will look and feel different than conducting a formal audit. One of the main differentiators is timing, as ongoing oversight allows for the identification of any potential discrepancies in near real time, instead of a retrospective analysis.
By identifying issues as they arise, oversight enables sponsors to:
- Address discrepancies with the PBM before major spend issues arise
- Reduce downstream financial impact
- Maintain continuous visibility into plan performance
Here you can see several real-world examples of how claims oversight can reveal performance discrepancies and open the door to conversations with the PBM for investigation and resolution:
Pharmacy Benefit Audits: Formal Validation and Deep Investigation
While oversight surfaces potential issues with the pharmacy contract, audits are the formal mechanism for validating and resolving them.
A pharmacy benefits audit is a retrospective, structured review conducted with PBM participation to confirm that contract terms were implemented and executed correctly.
Where oversight identifies signals, audits:
- Validate contract adherence at a granular level
- Establish documented findings for reconciliation and compliance
- Investigate root causes and to prevent further issues from reoccurring
Audits go far beyond observation. They “lift the hood” and examine how specific components (i.e. pricing logic, benefit design, rebate handling, clinical rules) were programmed and applied by the PBM.
Common audit types include:
- Implementation audits: Validate correct setup of plan terms before or after go-live
- Benefit design audits: Confirm member cost-sharing, accumulators, and exclusions
- Clinical audits: Validate coverage rules like prior authorizations and step therapy
- Financial audits: Validates that claims performance is in line with contractual guarantees across multiple areas of the pharmacy benefit
- Rebate audits: Verify rebate invoicing, methodology, and payment accuracy
Importantly, audits should not be thought of as punitive. They are a standard part of pharmacy benefits governance, designed to demonstrate due diligence, strengthen accountability, and ensure the plan is operating as intended.
They also play a critical forward-looking role, equipping sponsors with insights to negotiate stronger, more precise contract terms in future cycles.
How Oversight and Audits Work Together
The most effective pharmacy oversight works by complementing a proactive audit approach with ongoing claims monitoring:
- Oversight monitors performance continuously, analyzing every claim and surfacing discrepancies early
- Audits investigate those discrepancies formally, working with the PBM to validate findings and drive resolution
In practice, oversight often determines when and where an audit is warranted.
For example, if ongoing monitoring identifies a variance in pricing guarantees or rebate performance, that signal provides:
- The evidence needed to initiate an audit
- A focused scope for deeper investigation
- Greater leverage in working with the PBM to resolve discrepancies
See a real-world oversight + audit strategy case study where a global technology and engineering company noticed spend discrepancies and worked with Truveris to confirm and rectify the issues.
Without that continuous monitoring layer, many issues might remain buried in aggregate reporting or be surfaced at a point when significant billing errors may have already occurred.
Why Pharmacy Benefit Oversight Matters More After CAA in 2026 and Beyond
The Consolidated Appropriations Act (CAA) increases expectations across three dimensions of pharmacy benefits: transparency, verification, and accountability.
This shift changes the role of the employer from passive recipient to active fiduciary.
It is no longer sufficient to rely on PBM-reported results. Plan sponsors must be able to independently verify PBM performance, demonstrate that contract terms are being met, and show that pharmacy spend is reasonable and defensible. Oversight and audits together provide the mechanism to meet that standard.
To establish and strengthen pharmacy benefits due diligence practices, plan sponsors should:
- Implement continuous oversight to monitor claims and gain ongoing visibility into contract performance
- Understand audit provisions in their PBM contracts, including scope and frequency limitations
- Use audit rights strategically to validate discrepancies and confirm contract adherence
- Independently reconcile key financial and clinical components, rather than relying solely on PBM reporting
- Leverage audit findings to strengthen future contracts, improving clarity and enforceability of terms
In an environment defined by increasing complexity and regulatory scrutiny, plan sponsors that adopt both approaches will be best positioned to meet their fiduciary obligations and ensure their pharmacy benefits are performing exactly as intended.
