The federal government's single most productive tool for clawing back contractor and healthcare fraud just survived a constitutional attack that could have shut it down nationwide. In United States ex rel. Zafirov v. Florida Medical Associates, LLC, the U.S. Court of Appeals for the Eleventh Circuit ruled on September 1, 2026 that private whistleblowers who sue on the government's behalf under the False Claims Act are not unconstitutionally appointed federal officers, vacating a lower-court decision that had threatened to unravel qui tam enforcement across every industry that does business with Washington, including defense and civilian contractors.
The case traces back to a September 30, 2024 ruling by U.S. District Judge Kathryn Kimball Mizelle of the Middle District of Florida, who held that FCA relators exercise so much executive power that the Appointments Clause of Article II requires them to be appointed the way federal officers are appointed, not simply allowed to file suit on their own initiative. No other court had ever accepted that theory, but Mizelle's ruling gave defense contractors and healthcare companies a new argument for dismissing whistleblower fraud suits outright, and defendants nationwide began raising it. The Eleventh Circuit's ruling removes that argument as a case-killer, at least within the circuit, while leaving unresolved constitutional questions that keep the broader fight alive.
How the Eleventh Circuit Applied the Lucia Test to Whistleblowers
Writing for the panel, Judge Branch applied the officer test the Supreme Court set out in Lucia v. SEC, which asks whether a person occupies a "continuing" position established by law and separately whether that person exercises significant authority pursuant to the laws of the United States. The panel resolved the case on the first element alone, without reaching the significant-authority question: because a relator's tenure lasts only as long as the case, comes with no continuing compensation tied to a government office, and cannot be handed off to a replacement if the relator drops out, the court held that relators never occupy a continuing position — and so never become "officers" in the constitutional sense in the first place.
"In sum, we find that, while the length of any given FCA case is uncertain and variable, relators have temporary tenure and duration, no continuing emolument, and personal duties, so they do not occupy a continuing position," the panel wrote. "We disagree and hold that relators are not officers of the United States because they do not occupy a continuing position established by law," the opinion states, adding that the court joins its "sister circuits that have addressed this issue and hold that the qui tam provisions of the FCA do not violate the Appointments Clause."
That alignment matters procedurally as much as substantively. The Fifth, Sixth, Ninth and Tenth Circuits had already rejected Appointments Clause challenges to the FCA before Mizelle's decision broke that consensus at the district court level. The Eleventh Circuit's ruling restores unanimity among appellate courts that have actually decided the question, isolating Mizelle's reasoning as an outlier rather than the leading edge of a circuit split.
Why the Appointments Clause Fight Isn't Over
The ruling is narrower than a full vindication of qui tam enforcement. The panel explicitly declined to decide separate challenges the defendants raised under the Take Care Clause and the Vesting Clause, which go to whether letting private citizens direct federal fraud litigation improperly interferes with the executive branch's control over law enforcement. Instead of resolving those arguments itself, the Eleventh Circuit vacated the underlying judgment and remanded the case to the district court to take them up. That means Florida Medical Associates (doing business as VIPcare), Physician Partners, Freedom Health and Optimum Healthcare — the defendants accused of using false diagnosis codes to inflate Medicare reimbursements — are still litigating whether the FCA's enforcement structure passes constitutional muster, just on different grounds. The Department of Justice, which had declined to intervene in the underlying fraud allegations, appeared in the appeal solely to defend the statute's constitutionality.
The bigger uncertainty sits above the Eleventh Circuit entirely. Justices Clarence Thomas, Brett Kavanaugh and Amy Coney Barrett have each separately signaled interest in revisiting the qui tam provisions' constitutionality in prior opinions touching the FCA, in United States ex rel. Polansky v. Executive Health Resources and Wisconsin Bell v. United States ex rel. Heath. A parallel Appointments Clause challenge, Penelow v. Janssen, is pending before the Third Circuit, and judges on the Fifth Circuit have voiced their own skepticism about the arrangement in other proceedings. With three justices already on record expressing openness to the question and multiple circuits actively working through variations of it, Zafirov is unlikely to be the final word — it is a data point building toward eventual Supreme Court review, not a settlement of the issue.
What It Means for Contractors
For contractors and healthcare entities that do business with the government, the immediate effect is that the Appointments Clause defense loses most of its force as a quick off-ramp from a whistleblower suit, at least in the Eleventh Circuit and in any court persuaded by its reasoning. Companies facing FCA litigation can no longer expect an Appointments Clause motion alone to end a case the way Mizelle's ruling briefly promised. Qui tam suits remain the government's primary mechanism for surfacing fraud in federal contracting and healthcare billing, and whistleblowers retain standing to bring them.
That said, the remand keeps live ammunition on the table. Defense counsel in FCA cases nationwide are likely to continue pressing Take Care Clause and Vesting Clause theories now that the district court in Zafirov has been directed to actually rule on them, and companies already litigating FCA exposure should expect those arguments to surface in their own cases regardless of circuit. Given the Supreme Court justices' public interest in the underlying question, contractors should also treat any near-term certainty as provisional: a grant of certiorari in Zafirov, Penelow, or a similar case could reopen the entire framework relators operate under. For now, though, the ruling forecloses the single argument that had emboldened defendants to seek wholesale dismissal of qui tam suits, and it does so by aligning the Eleventh Circuit with every other circuit that has weighed in.
