Willful Blindness, Advice-of-Compliance Limits, and Rule 403 Gatekeeping in Healthcare Fraud: The Sixth Circuit’s Decision in United States v. Oliver Jenkins

Willful Blindness, Advice-of-Compliance Limits, and Rule 403 Gatekeeping in Healthcare Fraud: The Sixth Circuit’s Decision in United States v. Oliver Jenkins

Court: U.S. Court of Appeals for the Sixth Circuit

Date: October 17, 2025

Disposition: Convictions AFFIRMED

Publication Status: Not recommended for publication (non-precedential)

Introduction

In United States v. Oliver Jenkins (Nos. 23-3820/3821), the Sixth Circuit affirmed the convictions of an otolaryngologist, Dr. Oliver Jenkins, and his spouse, Sherry-Ann Jenkins (a Ph.D. neuroscientist with no clinical license), for conspiracy, health-care fraud, mail fraud, and wire fraud arising from the operation of the “Cognitive Center” within the physician-owned Toledo Clinic. The appeal—framed largely around sufficiency of the evidence, instructions on willful blindness (deliberate ignorance), the admissibility of a voluminous internal compliance research file, and a claimed good-faith reliance on the Clinic’s legal/compliance personnel—provides an instructive synthesis of Sixth Circuit doctrine on:

  • How juries may use deliberate-ignorance instructions in conspiracy (knowledge of unlawful aims only) and in specific-intent fraud crimes (as to knowledge of falsity, not to substitute for specific intent).
  • The limits of a “good-faith reliance” defense when defendants fail to fully disclose material facts to advisors and when the advice given does not authorize the specific conduct at issue.
  • Rule 403 gatekeeping that permits courts to exclude voluminous, cumulative compliance materials without violating the right to present a defense.

The case background includes complaints from Clinic clinicians and patients; an internal peer-review process; sharp increases in brain PET scans; Sherry-Ann’s diagnoses of Alzheimer’s disease and her recommendations (e.g., coconut oil, dietary changes, recurring appointments); and billing through Oliver’s NPI despite his non-involvement in patient encounters. After a March 2023 jury trial, both defendants were convicted on all counts; Sherry-Ann received 71 months’ imprisonment and Oliver 41 months.

Summary of the Opinion

The Sixth Circuit rejected four principal appellate challenges:

  1. Sufficiency of the evidence (conspiracy): There was ample circumstantial evidence that the Jenkinses knowingly agreed to a fraudulent scheme—misrepresenting Sherry-Ann’s credentials and practice scope, concealing the true nature of services, and resisting oversight—to support the jury’s finding of agreement and knowledge of unlawful aims under 18 U.S.C. § 1349.
  2. Good-faith reliance defense: The defense failed because the Jenkinses did not fully disclose pertinent facts to the Clinic’s legal/compliance advisors and, critically, were not advised that Sherry-Ann could diagnose patients or order PET scans while unlicensed and billing “incident to” Oliver’s NPI.
  3. Jury instructions:
    • Deliberate ignorance in conspiracy: The instruction properly addressed knowledge of the conspiracy’s unlawful purpose and did not allow the jury to find voluntary agreement via willful blindness (consistent with Sixth Circuit precedent).
    • Deliberate ignorance in specific-intent fraud offenses: No plain error; the instruction was tethered to knowledge of claim falsity, not to the separate specific intent to defraud, which the jury was separately required to find.
    • Unindicted co-conspirator instruction: No abuse of discretion. The defense’s theory that Toledo Clinic leadership bore responsibility warranted the neutral pattern instruction; the prosecution’s brief reference to possible unindicted co-conspirators in closing was not plain error.
  4. Evidentiary ruling on compliance research binder: No abuse of discretion in limiting admission to excerpts of the 544-page binder under Rule 403 as cumulative and potentially confusing; no violation of the right to present a defense because the defendants were allowed to build out their good-faith theory through testimony and selected documents, and to display the binder’s volume to the jury.

The court’s bottom line: the convictions were supported by sufficient evidence; the jury was properly instructed; and the evidentiary limits were within the district court’s discretion.

Detailed Analysis

Factual Context and Trial Themes

  • Sherry-Ann, unlicensed in Ohio, performed cognitive testing, made diagnoses (including Alzheimer’s), and ordered brain PET scans; bills went out under Oliver’s NPI.
  • “Incident to” and “general supervision” were initially explored internally as pathways to billing, but the Clinic’s compliance director (Lancaster) later recognized she had overlooked regulatory requisites (direct supervision; licensed providers for psychological services) inconsistent with what the Cognitive Center was doing.
  • Evidence of concealment and misrepresentation included Oliver’s instruction to represent the Cognitive Center as a “neuro-otology” division to an insurer (a fictitious division), and Sherry-Ann’s efforts to prevent skeptical clinicians from reading scans or to limit patient consultations with others.
  • Peer-review letters flagged diagnosing and ordering radiology as improper for Sherry-Ann, and ultimately the Clinic shuttered the Center.
  • Patients testified they believed Sherry-Ann was a physician and would not have sought or paid for care had they known she was unlicensed; billing inflated call durations; PET scan volume spiked from a few per year to 10–15 per week.

Precedents Cited and Their Influence

  • Sufficiency and standards:
    • United States v. Potter, 927 F.3d 446 (6th Cir. 2019); United States v. Paige, 470 F.3d 603 (6th Cir. 2006): de novo sufficiency review; rational trier of fact standard.
    • United States v. Hinojosa, 67 F.4th 334 (6th Cir. 2023): resolve conflicts in favor of the verdict.
    • United States v. Ouedraogo, 531 F. App’x 731 (6th Cir. 2013); United States v. Sliwo, 620 F.3d 630 (6th Cir. 2010): avoid stacking inferences; but circumstantial evidence can sustain verdicts (also United States v. Hughes, 505 F.3d 578 (6th Cir. 2007)).
  • Conspiracy under § 1349:
    • United States v. Betro, 115 F.4th 429 (6th Cir. 2024); United States v. Palma, 58 F.4th 246 (6th Cir. 2023): agreement to commit fraud, joined knowingly and voluntarily.
    • United States v. Pearce, 912 F.2d 159 (6th Cir. 1990); United States v. Conatser, 514 F.3d 508 (6th Cir. 2008): tacit agreement and participation may be inferred from conduct.
    • United States v. Rogers, 769 F.3d 372 (6th Cir. 2014): § 1349 does not require an overt act.
  • Mental-state comparators:
    • Liparota v. United States, 471 U.S. 419 (1985); Rehaif v. United States, 588 U.S. 225 (2019): knowledge elements can extend beyond conduct to attendant circumstances (cited by appellants; the panel emphasizes, for conspiracy, knowledge of unlawful aims).
  • Fraud elements and intent:
    • United States v. Singh, No. 24-3655, 2025 WL 2268031 (6th Cir. Aug. 8, 2025): health-care fraud’s “knowingly and willfully” standard.
    • United States v. Merklinger, 16 F.3d 670 (6th Cir. 1994); United States v. Castile, 795 F.2d 1273 (6th Cir. 1986): mail fraud; parallel rules for wire fraud (18 U.S.C. §§ 1341, 1343).
    • United States v. Frost, 125 F.3d 346 (6th Cir. 1997); United States v. Smith, 39 F.3d 119 (6th Cir. 1994): specific intent in mail fraud.
    • United States v. Daniel, 329 F.3d 480 (6th Cir. 2003): specific intent in wire fraud.
    • United States v. Davis, 490 F.3d 541 (6th Cir. 2007): intent may be inferred from concealment, misrepresentations, knowledge, and profits.
  • Good-faith reliance:
    • United States v. Rozin, 664 F.3d 1052 (6th Cir. 2012); United States v. Duncan, 850 F.2d 1104 (6th Cir. 1988): defense requires full disclosure of pertinent facts and good-faith reliance on advice.
  • Deliberate ignorance (willful blindness):
    • United States v. Warshawsky, 20 F.3d 204 (6th Cir. 1994), superseded on other grounds by U.S.S.G. § 2B1.1: permissible for knowledge of unlawful aims in conspiracy; cannot prove voluntary agreement.
    • United States v. Evans Landscaping Inc., 850 F. App’x 942 (6th Cir. 2021): error to let willful blindness prove agreement (contrasting instruction; not plain error there).
    • United States v. Lee, 991 F.2d 343 (6th Cir. 1993); United States v. Matthews, 31 F.4th 436 (6th Cir. 2022); United States v. Smigiel, 173 F.3d 857, 1999 WL 196575 (6th Cir. 1999): pattern instruction acceptable; no need for extra limiting language when clearly tied to knowledge.
    • United States v. Griffin, 524 F.3d 71 (1st Cir. 2008); United States v. Alston-Graves, 435 F.3d 331 (D.C. Cir. 2006): circuits uniformly approve willful blindness in specific-intent crimes when used for knowledge elements.
    • United States v. Bohn, 281 F. App’x 430 (6th Cir. 2008); United States v. Williams, 117 F.3d 1421, 1997 WL 369436 (6th Cir. 1997): approved use in mail/wire fraud on knowledge components.
    • United States v. Chen, 913 F.2d 183 (5th Cir. 1990): caution that willful blindness to facts cannot alone prove the distinct “purpose” element when a statute requires a specific objective.
  • Instructional standards and preservation:
    • United States v. Mitchell, 681 F.3d 867 (6th Cir. 2012): abuse of discretion standard; preserved objections.
    • United States v. Budd, 496 F.3d 517 (6th Cir. 2007); United States v. Sloman, 909 F.2d 176 (6th Cir. 1990): waiver through acquiescence.
    • United States v. Frederick, 406 F.3d 754 (6th Cir. 2005); Barnes v. Owens-Corning, 201 F.3d 815 (6th Cir. 2000): instructions reviewed as a whole.
    • United States v. Gandy, 926 F.3d 248 (6th Cir. 2019); United States v. Wood, 364 F.3d 704 (6th Cir. 2004): plain-error review where unpreserved; grave miscarriage standard.
  • Unindicted co-conspirator instruction:
    • United States v. Ashrafkhan, 964 F.3d 574 (6th Cir. 2020); United States v. Eaton, 784 F.3d 298 (6th Cir. 2015); United States v. Morrison, 594 F.3d 543 (6th Cir. 2010); United States v. Lawrence, 735 F.3d 385 (6th Cir. 2013): abuse-of-discretion standard; pattern instruction acceptable when theory of defense implicates others.
    • United States v. Chavez, 951 F.3d 349 (6th Cir. 2020); United States v. Frady, 456 U.S. 152 (1982): plain-error standard for unobjected-to prosecutorial comments.
  • Evidentiary rulings and the right to present a defense:
    • United States v. Dixon, 413 F.3d 540 (6th Cir. 2005); United States v. Wagner, 382 F.3d 598 (6th Cir. 2004); Romstadt v. Allstate, 59 F.3d 608 (6th Cir. 1995): broad discretion under Rule 403; cumulative evidence may be excluded.
    • Crane v. Kentucky, 476 U.S. 683 (1986): right to present a defense; balanced against evidence rules.
    • United States v. Blackwell, 459 F.3d 739 (6th Cir. 2006); Holmes v. South Carolina, 547 U.S. 319 (2006); Montana v. Egelhoff, 518 U.S. 37 (1996): no unfettered right to admit otherwise inadmissible evidence; cumulative exclusions permissible.
    • Fed. R. Evid. 403: exclude relevant evidence if probative value substantially outweighed by risk of confusion, waste, or needless cumulation.

Legal Reasoning and Application

1) Conspiracy: Agreement and Knowledge of Unlawful Aims

The panel emphasized that § 1349 conspiracy may be proved through circumstantial evidence and does not require an overt act. While defendants argued that they were transparent with Clinic leadership and believed their plan lawful—invoking cases like Liparota and Rehaif to stress knowledge beyond mere conduct—the court highlighted trial evidence permitting jurors to find that:

  • Oliver misrepresented Sherry-Ann’s credentials and the scope of her role (including diagnosing and ordering PET scans) to key Clinic actors.
  • Patients were led to believe Sherry-Ann was a physician; billing was done under Oliver’s NPI despite his lack of involvement.
  • When questioned by an insurer, Oliver directed staff to portray the Center as a “neuro-otology” division that did not exist.
  • Sherry-Ann sought to silence or sideline dissenting clinicians and encouraged patients to continue frequent, billed contacts.

From this, a rational jury could infer both knowledge of the conspiracy’s unlawful objective and a voluntary agreement to pursue it, notwithstanding some evidence consistent with mistake. The panel underscored that its role is not to reweigh evidence but to assess whether a reasonable juror could find guilt beyond a reasonable doubt when viewing evidence in the government’s favor.

2) Good-Faith Reliance on Compliance/Legal Advice

To establish good-faith reliance, defendants must show full disclosure of all pertinent facts and actual reliance on advice permitting the challenged conduct. The record demonstrated:

  • Lancaster’s early, mistaken exploration of “incident-to” and general supervision for neuropsychological testing did not authorize unlicensed diagnosis or ordering of PET scans, and later analysis clarified the need for direct supervision and licensure (as reflected in Medicare local coverage determinations).
  • Trudel (Clinic counsel) did not review the entire business plan and understood that diagnoses would be made by Oliver or the referring physician, not by Sherry-Ann.

Because advice did not cover the conduct the jury found fraudulent—and because the jury could conclude that defendants failed to fully disclose material facts to advisors—the defense did not defeat the government’s proof of intent. The panel also catalogued classic circumstantial indicia of fraudulent intent present here: concealment, misrepresentations, and financial benefit.

3) Jury Instructions

Three instruction-related issues were raised; the court rejected each.

  • Deliberate ignorance (conspiracy):
    • Under Warshawsky, a willful-blindness instruction may be used to establish knowledge of the conspiracy’s unlawful purpose, but not to prove voluntary agreement to join. The district court’s instruction reflected the Sixth Circuit’s Pattern Instruction and was “clearly directed” to knowledge of the conspiracy’s purpose; no additional limiting language was required, and there was no suggestion that the jury could use willful blindness to find agreement.
    • The panel contrasted Evans Landscaping, where an instruction improperly allowed willful blindness to stand in for voluntary agreement; that error did not occur here.
  • Deliberate ignorance (mail, wire, and health-care fraud):
    • There is no per se bar to willful-blindness instructions in specific-intent crimes; they may be used to prove knowledge of key facts (e.g., falsity of claims) so long as they do not collapse the separate “specific intent to defraud” element.
    • The district court properly instructed that deliberate ignorance could support a finding that defendants knew claims were false, while separately requiring the jury to find a specific “intent to deceive or cheat” for financial gain/loss. Thus, the instruction did not “back door” the specific intent element and was not plain error.
  • Unindicted co-conspirator instruction and closing:
    • Given the defense theory that Clinic leadership was culpable, the neutral pattern instruction on unindicted co-conspirators was fitting and not prejudicial.
    • The prosecution’s brief suggestion in closing that Clinic personnel could be co-conspirators was not plain error; it tracked the instruction and did not preclude fair consideration of the good-faith theory.

4) Evidentiary Ruling: Limiting the 544-Page Compliance Research File (Rule 403)

The district court allowed the defense to use and display the binder’s heft, introduce selected excerpts, and examine witnesses extensively about the research and timeline. It excluded wholesale admission under Rule 403 as cumulative and potentially confusing. The Sixth Circuit affirmed:

  • Trial testimony already covered the substance and chronology of the compliance work; full admission would “data dump” the jury with marginal additional probative value.
  • No due process or Sixth Amendment violation occurred; the defense lacked an entitlement to introduce voluminous cumulative evidence when its points were otherwise fully presented.
  • Any error would have been harmless because the binder would not change the critical fact that no one authorized the unlicensed diagnosing or ordering of PET scans.

Practical Impact and Forward-Looking Implications

  • Willful blindness in the Sixth Circuit—fine-grained boundaries:
    • Conspiracy: juries may consider willful blindness for knowledge of unlawful aims, but not to prove voluntary agreement.
    • Specific-intent fraud: prosecutors may use willful blindness to establish knowledge (e.g., falsity of claims), provided the court separately instructs and the jury separately finds the distinct “intent to defraud.”
  • Advice-of-compliance is not a safe harbor:
    • Reliance on internal compliance or counsel requires full disclosure of all material facts; defendants cannot cherry-pick advice or rely on advisors’ limited assumptions about scope of services.
    • Where advisors expressly or implicitly limit what is permissible (e.g., testing but not diagnosing or ordering radiology), defendants proceed at risk if they go beyond that advice.
  • Healthcare billing mechanics receive renewed scrutiny:
    • “Incident-to” billing for psychological/neuropsychological services requires direct supervision and proper licensure; unlicensed individuals cannot cloak clinical diagnosing or PET ordering under another’s NPI based on general supervision.
    • Local Coverage Determinations (LCDs) and Medicare rules—not internal interpretations—govern; compliance programs must keep current and accurate.
  • Rule 403 in complex white-collar trials:
    • Courts may exclude voluminous cumulative materials where testimony and excerpts capture the probative essence; parties should consider summaries, stipulations, and demonstratives rather than wholesale document dumps.
  • Institutional oversight as evidence of knowledge and intent:
    • Peer-review letters, insurer queries, and internal pushback can be powerful evidence of notice, knowledge of risk or impropriety, and potential concealment when defendants respond by evasion or misrepresentation.
  • Preservation matters:
    • Partial concessions about instructional applicability can waive challenges; where not waived, unpreserved objections face stringent plain-error review.

Although the opinion is unpublished and thus non-precedential, it synthesizes and applies existing Sixth Circuit principles in a way that will resonate in future health-care fraud, mail/wire fraud, and conspiracy prosecutions.

Complex Concepts, Simplified

  • NPI (National Provider Identifier): A unique number assigned to licensed providers used for billing. Unlicensed individuals cannot obtain or use an NPI; routing their services under another’s NPI requires strict compliance with federal rules.
  • “Incident-to” billing: A Medicare concept allowing a physician to bill for certain services furnished by auxiliary personnel as if the physician provided them—if strict conditions are met (e.g., the physician initiates the plan of care and provides appropriate level of supervision). For psychological/neuropsych services, LCDs may require direct supervision and licensure; general supervision is typically insufficient.
  • General versus direct supervision:
    • General supervision: The supervising professional must be available (e.g., by phone), but need not be physically present.
    • Direct supervision: The supervising professional must be physically present in the office suite and immediately available when services are furnished.
  • Conspiracy under 18 U.S.C. § 1349: Agreement to commit mail, wire, or health-care fraud, joined knowingly and voluntarily (no overt act required). Knowledge of the conspiracy’s unlawful aims is essential; a separate question is whether the defendant voluntarily agreed to join it.
  • Deliberate ignorance (willful blindness): When a defendant suspects a high probability of a fact (e.g., that claims are false) and consciously avoids confirming it, the jury may treat that as knowledge. It cannot be used to replace other required mental states (e.g., the separate “intent to defraud” or “agreement” elements) unless the instruction explicitly confines its role to knowledge.
  • Specific intent to defraud: Acting with the purpose to deceive or cheat to obtain money or property (or to cause financial loss). Knowledge that a statement is false is separate from intending to deceive for gain/loss, and both must be found for mail/wire/health-care fraud.
  • Good-faith reliance on advice: A defense that negates intent when the defendant fully discloses all material facts to a qualified advisor and genuinely relies on the advisor’s guidance. It fails if disclosure was incomplete or the advice did not authorize the specific conduct at issue.
  • Rule 403 (Evidence): Even relevant evidence may be excluded if its probative value is substantially outweighed by risks of confusing the issues, wasting time, or needless presentation of cumulative material.
  • Unindicted co-conspirator instruction: The jury may be told that conspiracies can involve people not on trial and that guilt does not depend on charging all participants—guarding against jury nullification based on perceived selective prosecution.

Conclusion

The Sixth Circuit’s decision in United States v. Oliver Jenkins affirms key doctrinal guardrails in fraud and conspiracy prosecutions:

  • Willful blindness may establish knowledge of unlawful aims (conspiracy) and knowledge of falsity (fraud), but it does not substitute for the distinct elements of voluntary agreement or specific intent to defraud.
  • Good-faith reliance on internal compliance or legal advice requires full disclosure and advice that genuinely authorizes the conduct; exceeding the scope of such advice defeats the defense.
  • District courts may limit voluminous, cumulative compliance materials under Rule 403 without infringing the defendant’s right to present a defense, particularly where the defense is otherwise fully aired through testimony and selected exhibits.

Factually, the case underscores how misrepresentations about licensure and scope of practice, billing anomalies (including NPI misuse), outlier utilization patterns (dramatic PET scan spikes), and evasive responses to institutional oversight can—taken together—support findings of fraudulent intent and conspiratorial agreement. Doctrinally, while unpublished, the opinion provides a clear, practice-oriented reaffirmation of Sixth Circuit law on deliberate-ignorance instructions, advice-of-compliance limits, and evidentiary gatekeeping in complex healthcare fraud prosecutions.

Case Details

Year: 2025
Court: Court of Appeals for the Sixth Circuit

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