Lack of Informed Consent Must Be Pleaded (Not Added by Bill of Particulars); Unopposed Malpractice Theories Are Dismissed on Summary Judgment

Introduction

In Heather J. v Rochester Regional Health (2026 NY Slip Op 01880 [4th Dept Mar. 27, 2026]), the Fourth Department reviewed summary-judgment rulings in a birth-injury medical malpractice action arising from an alleged failure to timely diagnose, respond to, and treat a uterine rupture. Plaintiffs (the parents, on behalf of their newborn) sued Rochester Regional Health and Unity Hospital (together, the “Hospital defendants”) and a labor-and-delivery nurse, Genea I. Haskin, R.N.

The appeal presented three recurring litigation issues in New York malpractice practice: (1) whether a plaintiff may effectively introduce a new “lack of informed consent” theory through a bill of particulars when the complaint pleads only traditional malpractice; (2) how the expert-affidavit burden-shifting framework applies when multiple negligence theories and multiple actors are alleged; and (3) whether a hospital can obtain summary judgment on vicarious liability where the alleged tortfeasor is a traveling/contract nurse rather than an employee.

Summary of the Opinion

The Fourth Department modified the order. It:

  • Struck lack-of-informed-consent allegations from plaintiffs’ amended bill of particulars as against the Hospital defendants, holding that the complaint did not plead that distinct theory and it could not be added via a bill of particulars.
  • Affirmed denial of summary judgment to Nurse Haskin, concluding that plaintiffs’ expert raised a triable issue of fact on deviation (notably, fetal heart-rate monitoring and timely notice to the obstetrician), creating a “battle of the experts” for the jury.
  • Partially granted summary judgment to the Hospital defendants by dismissing malpractice claims against them except those premised on their vicarious liability for Haskin’s alleged malpractice—because plaintiffs failed to oppose (with an expert response) the Hospital defendants’ prima facie showing on other direct-liability and employee-based vicarious-liability theories.

Analysis

Precedents Cited

1) Bills of particulars cannot add a new theory of liability

The court grounded its informed-consent holding in settled pleading doctrine:

  • Darrisaw v Strong Mem. Hosp., 74 AD3d 1769 (4th Dept 2010), affd 16 NY3d 729 (2011): cited for the core function of a bill of particulars—“amplify the pleadings, limit the proof, and prevent surprise at trial”—and the rule that a bill of particulars “may not be used to allege a new theory not originally asserted in the complaint.” This case supplies the doctrinal bridge from procedural purpose (notice and anti-surprise) to the remedial consequence (striking improper particulars).
  • Sebring v Wheatfield Props. Co., 255 AD2d 927 (4th Dept 1998): cited alongside Darrisaw for the same principle, reinforcing that this is routine Fourth Department practice rather than a fact-bound exception.

2) Traditional malpractice vs. lack of informed consent are distinct theories

  • SanMiguel v Grimaldi, — NY3d —, 2025 NY Slip Op 05780: relied on for the proposition that lack of informed consent is “a distinct theory of medical malpractice liability” rooted in a specific duty to inform and obtain consent, and that it and “traditional” malpractice “comprise[] different elements.” The Fourth Department used SanMiguel to frame the analytic necessity of separate pleading: different elements mean different notice requirements and different trial proof.
  • Raymond v Ryken, 98 AD3d 1265 (4th Dept 2012): cited to the same “different elements” point, anchoring the Court of Appeals’ articulation in local departmental precedent.

3) When the complaint omits informed consent, particulars must be stricken

  • Connelly v Warner, 248 AD2d 941 (4th Dept 1998): the key “remedy” precedent. The court quoted Connelly to hold that where a complaint is “based solely on [traditional] medical malpractice” and contains no separate informed-consent cause of action, informed-consent allegations in a bill of particulars must be struck.
  • Clark v Cucinotta, 229 AD3d 1106 (4th Dept 2024): used for the “sufficiently pleaded to avoid surprise and prejudice” framing—i.e., even if a plaintiff argues the complaint’s words implicitly suggested informed consent, the question is whether it provided adequate notice of that distinct theory.

4) Summary judgment in malpractice: expert affidavits and burden-shifting

  • Kristie M. v Mercy Hosp. of Buffalo, 240 AD3d 1228 (4th Dept 2025): cited for what a defendant’s expert affirmation must look like to establish a prima facie entitlement—“detailed, specific and factual in nature” and addressing each negligence claim in the bill of particulars.
  • Nesterenko v Hall, 239 AD3d 1314 (4th Dept 2025); Wicks v Virk, 198 AD3d 1315 (4th Dept 2021); Webb v Scanlon, 133 AD3d 1385 (4th Dept 2015): cited as representative applications of the rule that defendants meet their burden by competent expert proof of no departure (and, implicitly, that plaintiffs must respond in kind on the claims being challenged).
  • Ziemendorf v Chi, 207 AD3d 1157 (4th Dept 2022): cited for the plaintiff’s responsive obligation—an expert affidavit attesting to a departure from the accepted standard of care—to raise triable issues.
  • Mason v Adhikary, 159 AD3d 1438 (4th Dept 2018): used for the “classic battle of the experts” principle—when qualified experts directly conflict on departure/causation, credibility and weight are for the jury, not summary judgment.

5) Hospital vicarious liability for non-employee clinicians: control and reasonable belief

  • Pasek v Catholic Health Sys., Inc., 195 AD3d 1381 (4th Dept 2021): cited for the twin requirements often litigated in hospital agency/apparent agency settings: whether the hospital “maintain[ed] control over the manner and means” of the clinician’s work and whether the plaintiff “reasonably believe[d]” the clinician was provided by the hospital or acted on its behalf.
  • Torns v Samaritan Hosp ., 305 AD2d 965 (3d Dept 2003): cited as additional authority in the “independent contractor vs hospital responsibility” line, supporting the proposition that contractual status alone does not end the inquiry; the practical relationship and patient perception matter.

6) Vicarious liability claims rise or fall with the underlying malpractice claim (as to that actor)

  • Pezulich v Grecco, 206 AD3d 827 (2d Dept 2022) and Wilk v James, 107 AD3d 1480 (4th Dept 2013): cited for the proposition that where triable issues remain as to an individual clinician’s malpractice, summary judgment on a related vicarious liability claim premised on that malpractice is inappropriate.

Legal Reasoning

A. The “informed consent” theory failed at the pleading stage—so it could not be smuggled in through particulars

The court treated “lack of informed consent” not as a mere specification of negligence but as a different claim with different elements. That classification did the work: because it is “distinct,” defendants are entitled to clear notice of that theory in the complaint itself. The court then applied the bill-of-particulars doctrine: particulars may detail an already-pleaded claim, but they may not introduce a new one. The practical test was whether the complaint “sufficiently pleaded” informed consent to avoid “surprise and prejudice.”

Finding the complaint “based solely on [traditional] medical malpractice” and lacking a separate informed-consent cause of action, the Fourth Department ordered the informed-consent allegations in the amended bill of particulars stricken.

B. Nurse Haskin: both sides met the expert-proof threshold, creating a triable dispute

On Haskin’s motion, the court followed the familiar sequence:

  1. Haskin satisfied her prima facie burden with a “detailed, specific and factual” expert affidavit that addressed each negligence specification asserted against her and opined no departure from accepted practice.
  2. Plaintiffs countered with an obstetrician/gynecologist expert affidavit opining that Haskin departed from the standard of care, including by failing to properly monitor fetal heart rate, resulting in untimely notice to the obstetrician of the uterine rupture.
  3. Because the opinions “squarely oppose[d]” each other, the conflict became a credibility/weight question for the jury—i.e., a “classic battle of the experts.”

C. Hospital defendants: partial victory by narrowing the case to (1) Haskin-based vicarious liability and (2) nothing else

The Hospital defendants made two different summary-judgment plays, with different outcomes:

  • As to Haskin-based vicarious liability, the Hospital defendants argued she was a traveling nurse/contractor and thus not their responsibility. The Fourth Department held they did not meet their initial burden to eliminate triable issues on the “control” and “reasonable belief” criteria referenced in Pasek v Catholic Health Sys., Inc.. Consequently, because Haskin’s own malpractice claim survived (triable issues), the hospital’s vicarious-liability exposure tied to Haskin also survived.
  • As to all other malpractice theories against the Hospital defendants (direct liability and vicarious liability for three hospital employees), the Hospital defendants submitted a sufficiently detailed expert affidavit denying departures. Plaintiffs’ opposing expert affidavit addressed the hospital only in relation to Haskin’s fetal-monitoring conduct, and did not provide an expert response on the other asserted departures/actors. Under the burden-shifting cases the court cited, that omission was fatal: unopposed theories were dismissed.

The result is a procedurally precise narrowing: the case proceeds against Haskin directly and against the Hospital defendants only to the extent plaintiffs can prove the hospital is vicariously liable for Haskin’s alleged malpractice.

Impact

1) Pleading discipline for informed-consent claims

This decision reinforces (and operationalizes) the post-SanMiguel v Grimaldi message: lack of informed consent is not just another “negligence particular.” Plaintiffs who want that theory must plead it clearly in the complaint (typically as a separate cause of action or at minimum with unmistakable allegations tracking the duty-to-inform concept). Attempting to add it later through a bill of particulars invites a motion to strike and risks losing the theory entirely if amendment is not sought or is untimely.

2) Claim-by-claim, actor-by-actor expert opposition is mandatory

The hospital portion of the ruling illustrates a frequent summary-judgment trap: where defendants move against multiple specifications and multiple providers, plaintiffs must submit expert proof addressing each challenged theory they wish to preserve. An expert affidavit that only addresses one thread (here, the fetal-monitoring issue tied to Haskin) will not save unrelated direct-liability theories or claims tied to other staff.

3) Traveling/contract clinicians do not automatically sever hospital exposure

Hospitals increasingly staff units with traveling nurses and contractors. This decision signals that, at least at summary judgment, a hospital must affirmatively establish the relevant agency factors—particularly the degree of control over “manner and means” and whether patients reasonably believed the clinician was acting for the hospital. “Not an employee” alone may be insufficient to obtain dismissal.

4) Litigation management consequences

Practically, the opinion incentivizes:

  • Earlier motion practice to strike improper bills of particulars before expert discovery hardens positions.
  • More granular defense expert submissions addressing each alleged departure to shift the burden decisively.
  • More granular plaintiff expert submissions (or multiple experts) to avoid inadvertent abandonment of theories.

Complex Concepts Simplified

Bill of particulars
A document that provides details about what is already alleged in the pleadings. It is meant to clarify and prevent unfair surprise, not to add a new claim. If it introduces a new theory, courts can strike the offending portions.
Traditional medical malpractice vs. lack of informed consent
Traditional malpractice focuses on whether the provider departed from accepted medical practice in diagnosis/treatment. Lack of informed consent focuses on whether the provider failed to disclose material risks/alternatives so the patient could make an informed choice. They have different elements and require different proof, so they must be clearly pleaded.
Summary judgment (in malpractice cases)
A pretrial ruling that ends a claim if there is no genuine dispute of material fact. In malpractice cases, defendants usually need an expert affidavit showing no departure (or no causation). If they meet that burden, plaintiffs must counter with their own competent expert affidavit to create a triable issue.
“Battle of the experts”
When both sides submit qualified expert opinions that directly conflict on the standard of care and/or causation. Courts typically do not choose between them on summary judgment; the jury decides which expert to believe.
Vicarious liability; control and “reasonable belief”
Vicarious liability makes an institution responsible for the negligence of certain agents. Even if a clinician is a contractor, hospital liability may depend on factors such as whether the hospital controlled the manner and means of the work and whether the patient reasonably believed the clinician was provided by the hospital or acting on its behalf.

Conclusion

Heather J. v Rochester Regional Health tightens two important practice rules in New York medical malpractice litigation. First, because lack of informed consent is a distinct theory with distinct elements, it must be pleaded in the complaint and cannot be introduced for the first time through a bill of particulars—prompting the striking of those allegations here. Second, on summary judgment, plaintiffs must meet defendants’ expert showings with equally targeted expert opposition on each challenged theory and actor; otherwise, unaddressed malpractice claims will be dismissed. At the same time, the decision underscores that hospitals seeking to avoid vicarious liability for traveling/contract clinicians must affirmatively establish the absence of control and the absence of patient “reasonable belief”—issues that, on this record, remained triable as to Nurse Haskin.