The Collateral Source Rule in Utah After Rodriguez v. Diede: Medical Liens, Bias, and the Future of Trial Evidence

Introduction

Utah’s collateral source rule—once a straightforward evidentiary doctrine barring mention of third-party payments to injured plaintiffs—has undergone notable recalibration over the last two decades. What began as a shield for plaintiffs against jury prejudice has evolved into a contested frontline in personal injury litigation, especially around medical liens, litigation finance, and letters of protection.

The latest chapter in that evolution arrived in Rodriguez v. Diede, 2025 UT App 68, a decision from the Utah Court of Appeals that offers a critical clarification: not all references to deferred medical bills violate the collateral source rule. Specifically, where plaintiffs receive treatment under a medical lien or a financing agreement—common in cases involving uninsured or underinsured claimants—defendants may reference these arrangements to argue bias or lack of credibility, so long as they steer clear of discussing third-party payments or actual insurance coverage.

This post traces the roots of Utah’s collateral source rule, analyzes Rodriguez and its doctrinal underpinnings in Wilson v. IHC Hospitals, and explores the trial-level consequences for plaintiffs’ and defense counsel alike.

The Collateral Source Rule: A Brief Primer

The collateral source rule is a bedrock principle in tort law. It bars defendants from reducing their liability simply because the plaintiff received compensation from another source (e.g., insurance, workers’ comp, Medicare). In its classic formulation, the rule is rooted in two goals:

1. Preventing windfalls for tortfeasors: A wrongdoer should not benefit from the foresight of a plaintiff who secured insurance.

2. Avoiding jury prejudice: Knowledge that a plaintiff’s bills were covered could cause jurors to minimize or eliminate damage awards.

In Utah, the rule has traditionally been interpreted as a substantive common law right, not merely a rule of evidence. But its application—especially in complex cases involving multiple payors, liens, or third-party financing—has proven thorny.

Wilson v. IHC Hospitals, Inc.

A Turning Point

The Utah Supreme Court’s decision in Wilson v. IHC Hospitals, Inc., 2012 UT 43, was a pivotal moment. In Wilson, the court reaffirmed that the collateral source rule barred evidence that the plaintiff’s medical bills had been written off by Medicaid. The defense had sought to introduce evidence of those write-offs to show the “reasonable value” of the care was far less than billed.

The Court rejected that attempt:

“Evidence of Medicaid write-offs is inadmissible to show the reasonable value of medical services. The collateral source rule precludes any mention of payments (or discounts) made on behalf of the plaintiff.” — Wilson, ¶ 41

Importantly, Wilson emphasized that:

• The source of the benefit (here, Medicaid) was determinative;

• The plaintiff should not be penalized for receiving a benefit to which they were legally entitled;

• The rule applied even when the benefit was not strictly a “payment” but a negotiated discount or write-off.

This doctrinal clarity lasted for nearly a decade—until the rise of medical liens and third-party litigation finance began to muddy the waters.

The Rise of Medical Liens and Letters of Protection

In recent years, especially in personal injury cases involving uninsured plaintiffs, medical providers often agree to treat on lien—that is, in exchange for a promise of payment from any eventual settlement or judgment. Sometimes, third-party litigation finance companies will advance funds to cover medical treatment in return for a lien on proceeds.

These arrangements are not “payments” per se. They are deferred obligations, with the provider or financier stepping into the shoes of a creditor. Plaintiffs remain liable for the full bill—but the timing of payment is contingent on recovery.

This distinction raised an unsettled question: Does the collateral source rule bar disclosure of these arrangements at trial? That’s where Rodriguez v. Diede enters the scene.

Rodriguez v. Diede

Facts and Procedural Posture

In Rodriguez, the plaintiff sued for injuries sustained in a car accident. Her medical care was financed through liens and letters of protection—standard arrangements in Utah’s personal injury bar. At trial, the defense introduced evidence of those liens to suggest possible bias:

• That the treating physicians may have had a financial stake in the outcome;

• That the plaintiff had little incentive to mitigate costs, knowing she wasn’t paying out-of-pocket.

The plaintiff argued this evidence violated the collateral source rule, relying on Wilson and other precedent barring mention of write-offs and third-party payors.

The trial court admitted the evidence, and the jury found for the defense. On appeal, the Utah Court of Appeals affirmed the admissibility of the lien evidence—but drew careful boundaries around its use.

The Court’s Holding: Liens ≠ Collateral Sources

The key holding in Rodriguez is that medical liens are not collateral sources—and thus, evidence of their existence does not automatically violate the rule.

The Court explained:

“A medical lien is not a payment, discount, or other benefit conferred upon the plaintiff by a third party. Instead, it represents a deferral of payment by the plaintiff herself. The plaintiff remains liable for the full amount.” — Rodriguez, ¶ 27

Critically, the Court distinguished Rodriguez from Wilson on this ground:

“Unlike Medicaid in Wilson, which discharged the plaintiff’s obligation, the lien in this case merely postponed the timing of payment. It does not extinguish the debt.” — Rodriguez, ¶ 28

Thus, the Court upheld the trial court’s admission of evidence regarding the lien—but emphasized two important limits:

1. No evidence of actual payment by a third party: If the lien had been bought out by a finance company or satisfied by someone else, that could trigger the rule.

2. No inference that the plaintiff owed nothing: The jury must not be told—or led to believe—that someone else covered the bill.

This leads to the decision’s most important passage:

“Evidence of a medical lien is admissible when used to establish bias or motive, provided it is not used to imply that the plaintiff’s expenses were paid by another source or that the plaintiff has no obligation to repay them.” — Rodriguez, ¶ 30

Practical Takeaways for Trial Lawyers

1. Defense Counsel: Strategic Risks

The Utah Court of Appeals’ ruling in Rodriguez v. Diede, 2025 UT App 68, may appear to give defense counsel a tactical tool—allowing limited references to medical liens or financing arrangements—to question a plaintiff’s credibility or argue bias. Indeed, Judge Luthy’s opinion carefully draws distinctions:

• Medical liens and deferred payment arrangements are not collateral source benefits because the plaintiff remains ultimately liable for the bills, and the arrangements merely postpone—not extinguish—payment. (Rodriguez, ¶ 20–21)  .

• The defense may raise questions about liens or financing agreements to suggest motive, bias, or bad faith, so long as they do not imply that the plaintiff did not bear the expense or that someone else paid it. (Rodriguez, ¶ 31–32)  .

However, it is critical to recognize that Rodriguez is not Utah Supreme Court precedent—it is merely a Court of Appeals decision. That means:

1. The Utah Supreme Court may still narrow or overturn this ruling in the future, particularly if presented with a case raising similar issues.

2. The evidentiary line upheld in Rodriguez is very thin. Should the defense cross it—by implying that the plaintiff’s expenses are waived, paid by a third party, or otherwise not her responsibility—it could ground a successful appeal.

Given this uncertainty, weighing the strategic value of introducing such evidence becomes crucial. Even if properly framed, the potential reward is questionable:

• Jurors may not grasp the distinction between a lien and outright payment.

• The evidence can distract from the defense’s pivotal themes and raise needless complications.

• A misstep—even a subtle one—could result in reversal for a collateral source violation.

In light of these risks, defense counsel should ask: is it truly worth it? Especially given the low payoff and high risk—even while Rodriguez stands, the safer strategic move may be to avoid referencing liens or financing arrangements entirely unless absolutely necessary and tightly controlled.

2. Plaintiffs’ Counsel: Fortify the Record Early

For plaintiffs, Rodriguez raises the stakes of pretrial motions in limine. Practitioners should:

• Clearly define the terms of the lien: Who holds it? Is it still outstanding? Has it been sold?

• Move to exclude any language suggesting the debt was “paid” or “forgiven.”

• Educate the court on the distinction between a lien and a write-off (the former being an enforceable obligation, the latter a gift).

Where possible, plaintiffs may also stipulate to repayment obligations to prevent confusion—though such stipulations must be crafted carefully to avoid waiving arguments about damages.

The Bigger Picture: Is the Rule Narrowing?

While Rodriguez does not overrule Wilson, it certainly narrows the reach of the collateral source rule in Utah. The decision reflects a growing judicial recognition that:

• Not all third-party arrangements are “benefits” under the rule;

• Bias and credibility are legitimate concerns at trial;

• Courts must balance fairness to defendants with protection for plaintiffs.

As litigation financing continues to expand—and as medical care becomes more creatively structured—Rodriguez sets a precedent likely to be cited widely in Utah trial courts.

Conclusion: A New Era for Evidence in Utah Injury Trials

The Utah Court of Appeals’ ruling in Rodriguez v. Diede marks a significant moment in the state’s tort law jurisprudence. It allows juries to hear about certain financial arrangements between plaintiffs and providers—not as a means of reducing damages, but as a tool for assessing bias, credibility, and the integrity of the treatment record.

While Wilson remains good law, its broad application is now cabined. Plaintiffs must prepare for more robust evidentiary challenges. Defendants, meanwhile, gain a sharper tool—so long as they use it with care.

As always, The Legal Beagle will continue monitoring developments in this area and providing practical updates for Utah’s litigators.

Stay sharp, stay informed, and try your case like a pro.