Iowa Code § 147.139 Requires a Categorical Match of Board-Certified Specialties; “Field” Means Licensure Category

Introduction

In Linda Jones v. Larry Lindell, Broadlawns Medical Center Foundation d/b/a Broadlawns Medical Center, and Does I-V and Roes Corporations VI-X, inclusive, the Iowa Supreme Court considered whether a plaintiff’s designated medical expert—a board-certified urologist—could testify about the standard of care applicable to a defendant physician who was board-certified in obstetrics and gynecology (ob-gyn). The case arose from alleged injuries following a total hysterectomy and bilateral salpingo-oophorectomy performed by Dr. Larry Lindell at Broadlawns Medical Center.

The key issue was statutory: under Iowa Code section 147.139, when the “standard of care” is at issue, what does it mean for an expert to be in the “same or a substantially similar field” and, where the defendant is board-certified, in the “same or a substantially similar specialty”? The district court struck the urologist as unqualified and granted summary judgment for the defendants; the Supreme Court affirmed.

Summary of the Opinion

The Court held that:

  • For Iowa Code section 147.139(1)–(2), “field” refers categorically to the licensure category (here, physician licensure), not a narrower practice area within the license. Because both doctors were licensed physicians who practiced medicine, the “field” requirement was satisfied.
  • For Iowa Code section 147.139(3), “substantially similar specialty” is assessed categorically—comparing the specialties themselves, not the expert’s individualized experience with the particular complication or procedure at issue.
  • Urology and obstetrics/gynecology are not “substantially similar specialties” on this record; therefore, the plaintiff’s expert was statutorily unqualified, leaving the plaintiff without necessary expert testimony and warranting summary judgment.

Analysis

Precedents Cited

  • Cnty. Bank v. Shalla, 20 N.W.3d 812 (Iowa 2025)
    Cited for the standard of review: statutory interpretation questions are reviewed for correction of errors at law. This framing mattered because the appeal turned on how section 147.139 must be read and applied, not on discretionary evidentiary balancing alone.
  • State v. Boone, 989 N.W.2d 645 (Iowa 2023) (quoting State v. Iowa Dist. Ct., 889 N.W.2d 467 (Iowa 2017))
    Used to support the anti-surplusage canon: courts presume statutes do not contain superfluous words. The Court relied on this to reject the defendants’ attempt to define “field” as a narrow practice area (e.g., ob-gyn) when the statute speaks in terms of being “licensed to practice” in the same field. Because Iowa does not issue a separate “ob-gyn license,” reading “field” as “practice niche within a license” would effectively read “licensed” out of the statute.
  • Ray v. State, 564 S.W.3d 771 (Mo. Ct. App. 2018)
    Quoted (by the district court and discussed by the Supreme Court) for an ordinary-meaning formulation of “substantially similar” as sharing “considerable characteristics in common” and being “very much alike in substance and essentials.” The Iowa Supreme Court accepted the general ordinary-meaning approach but refined it into a specifically medical-board-certification test tied to foundational competence derived from certification.
  • Fisk v. State, 574 S.W.3d 917 (Tex. Crim. App. 2019) (quoting Prudholm v. State, 333 S.W.3d 590 (Tex. Crim. App. 2011), overruled in part on other grounds by Fisk)
    Cited for the proposition that “substantially similar” requires a “high degree of likeness” but not identity. The Court used these authorities to anchor its interpretation of “substantially similar” in established usage, then applied that meaning to a categorical comparison of medical specialties.
  • Johnson v. Commonwealth, 674 S.E.2d 541 (Va. Ct. App. 2009)
    Cited for a comparable definition: things are “substantially similar” if they share “common core characteristics” or are “largely alike in substance or essentials.” This supported the Court’s emphasis on “core characteristics” when comparing specialties.
  • Ranes v. Adams Lab'ys, Inc., 778 N.W.2d 677 (Iowa 2010)
    Cited for the burden of proof: the proponent of expert testimony must demonstrate the expert’s qualifications and the reliability of the opinion. This dovetailed with section 147.139’s command that the court “shall only allow” the expert if statutory requirements are “established by the evidence,” reinforcing that conclusory assertions of overlap are insufficient.

Legal Reasoning

1) “Field” in § 147.139(1)–(2): a licensure-category concept

The Court interpreted “field” against the backdrop of section 147.139’s breadth: it applies not only to physicians but to many “health care provider[s]” as defined in section 147.136A(1)(a) (e.g., nurses, dentists, pharmacists, chiropractors, etc.), each with distinct licensing regimes. From that structure, the Court reasoned that “field” most naturally functions as a categorical divider among licensure types, not as a divider among sub-disciplines inside a single license.

Applying that reading, the Court concluded the plaintiff satisfied subsections (1) and (2) because both Dr. Lindell and Dr. Wayment were licensed physicians and practiced medicine. Importantly, the Court did not decide what would qualify as a “substantially similar field” because “same field” was met.

2) “Substantially similar specialty” in § 147.139(3): categorical, not case-specific

The Court’s central doctrinal move is its adoption of a categorical approach for subsection (3). It contrasted the current statute with the prior version, under which an expert could qualify if their “qualifications relate directly to the medical problem or problems at issue and the type of treatment administered.” That earlier framework invited a procedure-and-complication-specific inquiry. The legislature replaced it in 2017, and the Court read that revision as a deliberate shift away from “case-by-case-problem” adjudication toward categorical credential matching.

The Court then articulated an operational test:

Two board-certified medical specialties are substantially similar when they share a high degree of likeness in their core characteristics such that a practitioner certified in one specialty would, by virtue of that certification alone, possess the foundational knowledge and competence to evaluate and opine on the standard of care applicable to the other specialty.

The Court emphasized what the test excludes: it does not turn on incidental overlap, occasional clinical collaboration, or the proposed expert’s individualized experience with the particular injury pattern. The inquiry compares the specialties themselves.

To guide application, the Court listed nonexclusive factors that may evidence categorical similarity, including: formal definitions of the specialties, certifying board structures, similarities in education and training, similarities in scope of practice, overlap in core and procedural competencies, professional association overlap, and hospital credentialing patterns.

3) Application: urology is not substantially similar to obstetrics and gynecology on this record

The Court upheld the district court’s conclusion that the plaintiff failed to carry her burden to prove substantial similarity. It grounded that result in multiple forms of categorical evidence:

  • Formal definitions and scope: urology concerns the genitourinary tract; obstetrics concerns pregnancy/childbirth; gynecology concerns the female genital tract and reproductive physiology. While urologists treat female urinary tract issues, urology’s definition also expressly includes focus on the male reproductive system, underscoring a different core orientation than ob-gyn.
  • Separate certifying boards: urology and obstetrics/gynecology are certified by different member boards of the American Board of Medical Specialties. The Court treated separate boards as probative that the profession recognizes distinct training and credentialing tracks (while noting that shared-board certifications might suggest closer similarity in other contexts).
  • Subspecialty “urogynecology” does not collapse the parent specialties: both boards recognize urogynecology as a subspecialty, but that discrete “bridge” did not establish that the primary specialties are substantially similar “in their entirety.” The Court also noted the expert was not certified in urogynecology.
  • Evidentiary failure on overlap factors: the plaintiff offered broad assertions of overlap without competent evidence on curricular overlap, training similarities, core competencies, procedural competencies, professional association overlap, or credentialing patterns. Where there was specific evidence, it related to Dr. Wayment individually and tended to show dissimilarity (including testimony that he did not perform hysterectomies and was not familiar with the ob-gyn standard of care).

Finally, the Court rejected the plaintiff’s attempt to reframe the dispute as involving only postoperative care and ureter injury management. Under the categorical approach, experience treating a complication does not substitute for the statutorily demanded specialty similarity, and the expert report also included an intraoperative criticism.

4) Procedural consequence: disqualification can be case-dispositive

Having affirmed exclusion of the only standard-of-care expert, the Court affirmed summary judgment because the plaintiff could not proceed on a medical malpractice claim without qualified expert testimony on standard of care and breach.

Impact

  • Clarifies a two-tier structure in § 147.139: “field” (subsections (1)–(2)) is satisfied at the licensure-category level for physicians, but “specialty” (subsection (3)) imposes a stricter, board-certification-based gatekeeping rule when the defendant is board-certified.
  • Locks in a categorical method for “substantially similar specialty”: Iowa courts must compare specialties as specialties, not “what happened in this case.” This narrows the availability of cross-specialty testimony even where clinical issues overlap.
  • Raises plaintiffs’ evidentiary burden at the expert-qualification stage: plaintiffs should be prepared to submit concrete evidence addressing the Court’s similarity factors (board materials, training curricula, competency frameworks, credentialing norms), not merely an expert’s say-so or experience treating complications.
  • Signals heightened risk of early dispositive motions: defendants can leverage section 147.139(3) via motions to strike/exclude paired with summary judgment, making expert-selection strategy and record-building critical from the outset.

Complex Concepts Simplified

  • Standard of care: the level of skill, knowledge, and care that a reasonably careful practitioner in the relevant discipline would use under similar circumstances.
  • Motion to strike/exclude an expert: a request to prevent an expert from testifying because the expert does not meet statutory or evidentiary requirements.
  • Summary judgment: a ruling entered without trial when there is no genuine dispute of material fact and the moving party is entitled to judgment as a matter of law. In malpractice cases, if the plaintiff lacks a qualified standard-of-care expert, summary judgment often follows.
  • Categorical vs. case-specific inquiry: a categorical inquiry asks whether two specialties match in general (as credentialed by boards), while a case-specific inquiry asks whether an expert’s particular experience fits the facts of the dispute. This opinion holds that section 147.139(3) requires the former.
  • “Substantially similar specialty”: not “some overlap,” but a high degree of likeness in the specialties’ core characteristics such that certification in one implies foundational competence to opine on the other.

Conclusion

This decision establishes two important interpretive rules for Iowa Code section 147.139: (1) “field” in subsections (1)–(2) is best read as the licensure category (making physician-to-physician matching sufficient there), and (2) “substantially similar specialty” in subsection (3) demands a categorical comparison of board-certified specialties, not a fact-driven inquiry into the expert’s individualized experience with the complication or procedure. On that framework, a board-certified urologist was not qualified to opine on the standard of care of a board-certified ob-gyn in a hysterectomy-related malpractice claim, and the absence of a qualified expert properly led to summary judgment.