Payment integrity is a technical process that checks whether individual claims were coded and priced correctly. Fiduciary intelligence is a governance framework that documents whether the plan sponsor prudently monitored its vendors, as ERISA Section 404 requires. Payment integrity catches claim errors. Fiduciary intelligence protects the people legally responsible for the plan.
Most self-funded plans confuse a claims tool with a legal defense, and the gap between them is where lawsuits start.
A mid-size manufacturer with 1,400 employees paid $340,000 in claims for a coordination of benefits failure that ran undetected for eighteen months (Willis Towers Watson). The plan's payment integrity vendor never flagged it because the claims were coded correctly.
The problem wasn't accuracy. It was that nobody on the plan sponsor's side could show they had monitored the TPA's handling of COB determinations at all. That gap, between a clean claim and a documented oversight process, is the entire subject of this article.
Why Payment Integrity Is Not the Same as Fiduciary Responsibility
Sixty-seven percent of covered workers in the United States are enrolled in self-funded health plans, and that share climbs to 80 percent among firms with 200 or more employees (Kaiser Family Foundation, 2025).
Every one of those employers carries fiduciary duties under the Employee Retirement Income Security Act (ERISA) regardless of whether they know it. Payment integrity is one useful tool for managing plan spend.
It is not the same thing as meeting that legal duty, and treating the two as interchangeable leaves plan sponsors exposed.
What Payment Integrity Actually Does
Payment integrity is the set of technical processes and software that verify whether a submitted claim was billed, coded, and priced correctly before or after payment. It answers a narrow question: did the plan pay the right dollar amount for this specific service.
Most people assume payment integrity is a comprehensive safeguard for the plan. It is not designed to be one. It is a claims-accuracy layer, built to catch duplicate billing, upcoding, and pricing errors against contracted rates. The global payment integrity market has grown to roughly $9 billion, expanding at about 7 percent annually as payers invest more heavily in automated claims review (McKinsey).
The tools are genuinely useful. They catch a meaningful share of overpayments that would otherwise slip through automated adjudication. What they do not do is document whether the plan sponsor exercised the kind of ongoing, independent oversight that ERISA requires of a fiduciary.
A payment integrity report can show a clean claims file and still leave a plan sponsor unable to answer basic questions about vendor monitoring, fee reasonableness, or conflict of interest review.
Why the Gap Exists
The gap between payment integrity and fiduciary protection exists because most self-funded plans were designed for administrative efficiency, not employer oversight. Standard administrative services agreements typically treat a small sampling audit as the complete review, and plan sponsors accept it because it has been considered the industry standard for decades.
TPAs may have limited incentives to identify their own payment errors. Industry studies report claims processing error rates of 2% to 6%, depending on the source and plan complexity (Baker Tilly). At the same time, many TPAs report self-audit accuracy rates close to 99% (ClaimInformatics). This does not necessarily mean either number is wrong. They measure different things. Self-audits often focus on processing accuracy and system rules, not whether the correct amount was ultimately paid.
There is also a structural asymmetry in who has access to the data. Many TPAs release detailed claims files only upon request, often in formats that require technical expertise to analyze (Benosphere). Under ERISA Section 404(a)(1)(B), the fiduciary must act "with the care, skill, prudence, and diligence" of a prudent expert (U.S. Department of Labor). It is difficult to meet that standard when the party being monitored controls the data used to monitor it.
The Real Cost of Treating Payment Integrity as Sufficient
Self-funded employers spending between $10 million and $100 million annually in healthcare claims face $200,000 to $2 million in unrecovered leakage under even a conservative 2 percent error rate (ClaimInformatics). Payment integrity tools recover some of that. Independent claims audits with full review typically recover an additional 1 percent to 3 percent of annual claims spend on top of whatever the TPA's own systems caught (Benosphere).
The financial cost is real but it is not the largest exposure. The fiduciary cost is. ERISA fiduciaries who breach their duties can be held personally liable to restore plan losses, and courts have referred to fiduciary obligations under the statute as among "the highest known to law" (ASPPA). A plan sponsor that relied entirely on a TPA's self-reported payment integrity metrics, with no independent verification, has a documentation problem the moment a participant or the Department of Labor asks how oversight was performed.
Consider the analogy of a building inspector who only checks whether individual bricks meet code. That inspector can sign off on every brick and still miss that the foundation was never surveyed. Payment integrity checks bricks. Fiduciary intelligence checks whether anyone verified the foundation.
What's Actually Happening Behind the Scenes
Sampling Gaps
A standard TPA audit reviews a stratified sample, commonly 200 to 400 claims, against plan documents (Baker Tilly). For a plan processing 80,000 claims annually, that represents roughly 0.3 percent to 0.5 percent of total claims volume (Benosphere). The remaining 99.5 percent goes unreviewed by anyone independent of the TPA.
Coordination of Benefits Failures
COB errors occur when a plan pays as primary when another payer, such as Medicare or a spouse's plan, should have paid first. A COB failure can produce a 60 percent to 80 percent overpayment on the affected claim (Benosphere), and these errors are difficult for automated payment integrity tools to catch because the claim itself may be coded correctly.
Vendor Fee Structures on Recovered Dollars
When TPAs or carrier-affiliated vendors do identify and recover overpayments, they frequently retain a substantial share. Post-pay recovery programs commonly take 40 percent to 50 percent of recovered dollars (ClaimInformatics), which means even a functioning payment integrity process may return less value to the plan than the raw recovery number suggests.
Governance Documentation
DOL guidance emphasizes that fiduciaries must document their decision-making process, not simply achieve a good outcome (DOL elaws Fiduciary Advisor). A payment integrity dashboard, no matter how sophisticated, is not itself governance documentation unless the plan sponsor can show it was reviewed, questioned, and acted upon.
Why Current Approaches Aren't Enough
How to fix it
Red Flags That Signal the Gap Applies to Your Plan
The ROI of Doing It Right
Independent claims audits with full review typically find discrepancies in 3 percent to 5 percent of paid claims costs, with actual recoveries in the 1 percent to 2 percent range (MedInsight). On a $30 million annual claims spend, that is $300,000 to $600,000 in identified overpayments, with $300,000 to $600,000 recoverable even under conservative assumptions.
The larger return is harder to put a number on but matters more in a dispute. A documented fiduciary process, maintained consistently across plan years, is described by the DOL as the strongest defense against audits and litigation (Ascensus). Plans that can produce that record are simply in a different legal position than plans that cannot, regardless of how their payment integrity metrics look in isolation.
Dependent eligibility reviews, treated as a distinct workstream from claims audits, frequently pay for themselves within months (Benosphere) and are one of the fastest ways to demonstrate near-term ROI while the broader fiduciary documentation process is being built out.
Conclusion and Next Steps
Payment integrity and fiduciary intelligence solve different problems, and a self-funded plan needs both. Payment integrity keeps individual claims accurate. Fiduciary intelligence protects the plan sponsor and named fiduciaries by documenting that oversight actually happened, in the way ERISA requires.
The gap between the two is exactly where fiduciary breach claims originate. Closing it does not require replacing your payment integrity vendor. It requires building a separate, deliberate governance record alongside it. [internal link: TPA performance guarantees guide] can help you evaluate whether your current vendor contract measures the right things, and [internal link: claims audit vs payment integrity comparison] walks through how to structure both functions without duplicating cost.
Frequently Asked Questions
Is payment integrity the same as fiduciary compliance?
No. Payment integrity checks individual claims accuracy. Fiduciary compliance requires documented, independent oversight of vendors under ERISA Section 404.
Who is legally responsible for claims errors, the TPA or the plan sponsor?
The plan sponsor. ERISA places fiduciary responsibility on the sponsor, not the TPA, even though the TPA processes the claims.
What does ERISA Section 404 actually require?
It requires fiduciaries to act with the care, skill, prudence, and diligence of a prudent expert familiar with plan administration.
How often should a self-funded plan run an independent claims audit?
Industry guidance generally recommends every two to three years, with more frequent monitoring for larger or higher-risk plans.
Can a plan sponsor rely on a TPA's self-reported accuracy numbers?
Relying solely on self-reported data, without independent verification, does not demonstrate the prudent oversight ERISA requires.
What percentage of claims does a typical TPA audit actually review?
Often well under 1 percent of total claims volume, since standard TPA audits use small stratified samples.
Does the Consolidated Appropriations Act change plan sponsor audit rights?
Yes. It strengthened plan sponsors' rights to full claims data access from TPAs and PBMs upon request.
What is the single most common dollar-weighted claims error?
Duplicate billing, followed closely by coordination of benefits failures on claims that should have paid secondary.
