For many pharmacies, a PBM audit begins as a routine request for records and ends with a startling realization: what appeared to be a simple compliance review has evolved into a threat to the pharmacy's continued existence. Every year, pharmacies across the country receive audit findings from OptumRx, Express Scripts, CVS Caremark, Prime Therapeutics, Humana, and other pharmacy benefit managers (PBMs) that result in substantial recoupment demands, corrective action plans, or outright termination from PBM networks.
In many cases, the issues that ultimately lead to termination are not the result of intentional misconduct. Rather, they stem from recurring operational mistakes, documentation gaps, poor inventory practices, or compliance deficiencies that accumulate over time and become highly problematic once reviewed by a PBM auditor. Understanding these common pitfalls is one of the most effective ways pharmacies can reduce risk and protect their network participation.
Why PBM Audits Are Becoming More Aggressive
Over the last decade, PBMs have significantly expanded their audit and investigative activities. What was once primarily a claims verification process has evolved into a comprehensive review of pharmacy operations. Modern PBM audits frequently examine inventory management, purchasing records, dispensing practices, patient communications, prescriber relationships, copayment collection procedures, delivery documentation, and compliance with network participation requirements.
As a result, pharmacies are no longer being evaluated solely on whether a claim was paid correctly. Instead, PBMs increasingly scrutinize whether the pharmacy can demonstrate compliance through complete and consistent documentation. When documentation is missing, incomplete, or inconsistent, auditors often assume the worst-case scenario.
The reality is that many pharmacy terminations occur not because of what happened, but because the pharmacy cannot adequately prove what happened.
Audit Trap #1: Inventory Shortages and Unsupported Inventory
Among the most common reasons pharmacies face adverse audit findings are inventory discrepancies. PBMs expect pharmacies to maintain sufficient inventory to support every claim billed to the network. When auditors compare purchasing records against dispensing records and identify shortages, the pharmacy may be accused of billing for medications it could not have dispensed.
Inventory issues become even more problematic when pharmacies cannot adequately document inventory transfers between affiliated locations, wholesaler purchases outside traditional channels, returns, credits, or other inventory adjustments. Even when the medication was properly dispensed to the patient, the absence of supporting documentation can create the appearance of non-compliance.
Pharmacies should routinely reconcile inventory, maintain complete purchasing records, preserve documentation relating to transfers and returns, and ensure that records can be readily produced during an audit.
Audit Trap #2: NDC Billing Errors
National Drug Code (NDC) billing errors remain one of the most heavily scrutinized issues in PBM audits. PBMs increasingly compare the NDC reflected on claims submissions with purchasing records, dispensing logs, and inventory data.
Problems frequently arise when pharmacies dispense one manufacturer's product but bill another NDC, substitute package sizes without appropriate documentation, rely on software defaults, or fail to update billing information following inventory changes. In many instances, the discrepancy may be entirely administrative. Nevertheless, PBMs often treat inaccurate NDC billing as a serious compliance concern.
Because NDC-related findings can impact hundreds or even thousands of claims, seemingly minor billing errors can quickly escalate into significant recoupment demands and termination proceedings.
Audit Trap #3: Incomplete Prescription Documentation
Many pharmacies underestimate the importance of maintaining complete prescription records long after a prescription has been dispensed. During an audit, PBMs often request copies of prescriptions, refill authorizations, physician communications, patient communications, delivery records, signature logs, and supporting clinical documentation.
Missing signatures, incomplete refill records, undocumented provider clarifications, absent delivery confirmations, or gaps in prescriber communications can all trigger adverse audit findings. Even where the pharmacy acted appropriately, the inability to produce documentation may result in adverse conclusions.
A common misconception among pharmacies is that documentation requirements are primarily regulatory in nature. In reality, PBMs frequently impose contractual documentation requirements that extend beyond those required by state law.
Audit Trap #4: Failure to Collect and Document Copayments
Copayment collection practices continue to be a major area of PBM scrutiny. PBMs often investigate whether pharmacies routinely waive copayments, fail to document hardship determinations, or inconsistently collect patient cost-sharing obligations.
Many pharmacies believe they are helping patients by reducing financial barriers to care. However, PBMs frequently view routine copayment waivers as a violation of provider agreements and, in some cases, as evidence of improper inducement practices.
Pharmacies should ensure that they maintain written financial hardship policies, document exceptions consistently, and preserve records demonstrating compliance with applicable contractual requirements.
Audit Trap #5: Poor Response Strategies During the Audit
One of the most overlooked audit traps occurs after the audit has already begun.
Many pharmacies respond to PBM audits without first understanding the allegations, reviewing the requested records, or evaluating the potential implications of the audit findings. Records may be produced hastily, explanations may be incomplete, and opportunities to clarify misunderstandings may be missed.
The initial audit response often shapes the auditor's perception of the pharmacy. Inconsistent explanations, incomplete submissions, and disorganized records can transform manageable issues into major compliance concerns.
By contrast, a thorough and strategic response can frequently resolve concerns before they develop into recoupment demands or termination actions.
Audit Trap #6: Waiting Until a Termination Notice Arrives
Perhaps the most costly mistake pharmacies make is assuming that problems can be addressed later.
Many pharmacies do not seek assistance until after receiving a termination notice, or significant recoupment demand. By that point, the PBM has often completed its investigation, issued findings, and developed a narrative regarding the pharmacy's conduct.
The strongest defenses are usually built long before the termination stage. Addressing concerns early, correcting deficiencies, organizing records, and developing a comprehensive response strategy can substantially improve a pharmacy's position during the audit process.
Once a termination notice is issued, deadlines become shorter, options become more limited, and the consequences become far more severe.
The Best PBM Audit Defense Starts Before the Audit
The most effective PBM audit defense is proactive rather than reactive. Pharmacies that routinely evaluate their inventory controls, documentation procedures, billing practices, copayment policies, and compliance programs are often better positioned to withstand audit scrutiny.
A well-maintained compliance program not only reduces the likelihood of adverse findings but also allows pharmacies to respond quickly and effectively when audits occur. In an environment where PBMs continue to expand enforcement efforts, preparation has become one of the most valuable tools available to independent pharmacies.
When Audit Findings Become Termination Proceedings
A PBM audit should never be viewed as merely an administrative inconvenience. Increasingly, audits serve as the foundation for recoupment actions, fraud, waste and abuse investigations, corrective action plans, and provider terminations.
Understanding the common mistakes that lead to adverse findings can help pharmacies avoid preventable compliance issues and better protect their business operations. While not every audit leads to a network termination, the pharmacies that successfully navigate the process are often those that recognize the risks early and treat the audit with the seriousness it deserves.
How HLA Can Help
Health Law Alliance represents pharmacies nationwide in matters involving PBM audits, PBM recoupment demands, network terminations, fraud, waste and abuse investigations, PBM credentialing disputes, and other healthcare regulatory matters. Our PBM defense attorneys regularly assist pharmacies in responding to audit requests, challenging adverse findings, preparing appeal submissions, negotiating corrective action plans, and protecting continued network participation. If your pharmacy has received a PBM audit notice, audit findings, or a termination letter, our PBM defense team can help evaluate your options and develop a strategy tailored to your pharmacy’s specific circumstances. Call us today for a free consultation.
