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Defense Digest

Limiting the Opinions of Plaintiff’s Non-Retained Expert Witnesses Regarding Injury Causation and Permanency

Defense Digest, Vol. 30, No. 1, March 2024

March 1, 2024

by Thomas J. Slogar and Frank L. Madia

Key Points:

  • Plaintiff’s non-retained experts are treating physicians, and their testimony at trial should be limited to their scope of treatment, diagnosis, and prognosis with respect to the injuries alleged. 
  • Plaintiff’s treating physicians lack the proper foundation to provide expert opinion testimony on medical causation and permanency unless they take the plaintiff’s history relating to an incident and review the records of the plaintiff’s other physicians.

When a plaintiff discloses a treating physician as a non-retained medical expert, this non-retained expert’s testimony should be limited to exclude testimony regarding medical causation and permanency unless there is a proper predicate for such testimony. To lay the proper predicate, the physician must have reviewed the plaintiff’s medical records from other treating physicians, and the physician should obtain a history from the plaintiff that describes the manner in which the plaintiff was allegedly injured. 

For instance, in a slip and fall case, the history should include the manner in which the plaintiff allegedly slipped and fell. Where the treating physician fails to review the medical records from the plaintiff’s other medical providers and fails to obtain a history of how the plaintiff allegedly came to be injured, there is an argument that the non-retained expert/treating physician should be precluded from testifying about injury causation and permanency.

Pursuant to § 90.702, Fla. Stat., Daubert v. Merrell Dow Pharm., Inc., 509 U.S. 579 (1993), and other applicable Florida law, a trial court must make two preliminary factual determinations prior to permitting expert testimony: (1) whether the expert testimony will assist the trier of fact in understanding the evidence or in determining a fact in issue; and (2) whether the witness is qualified by knowledge, skill, experience, training, or education to express an opinion on the matter.

Under Daubert, the trial court is specifically assigned a gatekeeper task of ensuring that an expert’s testimony, whether scientific or non-scientific, rests on a reliable foundation and is relevant to the task at hand. Id. See also Kumho Tire Co. v. Carmichael, 526 U.S. 137, 141, 148-49 (1999); Corwin v. Walt Disney World Co., 475 F.3d 1239, 1250 (11th Cir. 2007). 

In Cooper v. Marten Transp., Ltd., 539 Fed. Appx. 963, 967 (11th Cir. 2013), the Eleventh Circuit explained that causation “could not be determined through a physical examination and the chronology of events alone.” The court further noted in that case that neither physician explained the basis for their opinions. Id. 

Courts frequently exclude causation opinion testimony of expert witnesses who base their opinions on a plaintiff’s account of the facts without consideration of other possible causes of injury. See Carmody v. State Farm Mut. Auto. Ins. Co., 2015 WL 5542534, at *3 (M.D. Fla. Sep. 18, 2015).

Moreover, even if an expert is qualified, the expert must have a sufficient factual predicate underlying those opinions. Florida Statute § 90.705(2), explicitly states: “[i]f the [opposing] party establishes prima facie evidence that the expert does not have a sufficient basis for the opinion, the opinions and inferences of the expert are inadmissible unless the party offering the testimony establishes the underlying facts or data.” 

The legislative history of the rule emphasizes that this subsection intends to provide protection for opposing counsel so that expert opinions that are completely unqualified will not be admitted and risk prejudicing the jury. See Florida Statute § 90.705, Law Revision Counsel Note (1976). “In this instance, the protection of using cross-examination to expose the flaws in the opinion is not sufficient in all cases.” Id.

In a recent slip and fall case in Broward County, Florida, the plaintiff disclosed a non-retained expert/treating physician who was a pain management specialist. This doctor had not been provided and had not otherwise reviewed any medical records regarding the plaintiff’s post-incident treatment, other than his own records. He had not obtained a history from the plaintiff of how the plaintiff had allegedly slipped and fallen or how the plaintiff was allegedly injured. In this particular case, the physician admitted in deposition that he was not retained to provide any opinion testimony regarding any permanent injury. 

The opinions of the physician regarding the plaintiff’s medical condition were based solely on subjective statements made by the plaintiff, that the alleged injuries occurred as a result of the incident (without any history of the incident itself or how the plaintiff came to be injured as a result of the incident), together with the medical treatment related to the physician’s care of the plaintiff (in a vacuum, without any medical treatment history related to the care and treatment provided by the plaintiff’s other treating physicians).
 
There was no record evidence of any attempt by the non-retained expert/treating physician to eliminate other possible causes of the plaintiff’s conditions. Additionally, there was no record evidence that this physician conducted a review of the plaintiff’s pre- or post-incident medical history. Accordingly, it was reasonable to conclude that the doctor intended to identify the condition for treatment purposes rather than to determine its exact source. See generally, Turner v. Iowa Fire Equipment, Co., 229 F.3d 1202, 1205 (8th Cir. 2000). Furthermore, none of the plaintiff’s medical records revealed information to demonstrate that the doctor made any “attempt to consider all the possible causes, or to exclude each potential cause until only one remained, or to consider which of two or more non-excludable causes was more likely to have caused the condition.” Id. at 1208 (holding that the trial court did not abuse its discretion in excluding treating physician causation opinion, based exclusively upon the medical history obtained from the plaintiff, which indicated no respiratory problems, and the temporal relationship between the incident and the onset of symptoms); see also, e.g., State, Div. of Risk Mgmt. v. Martin, 690 So.2d 651 (Fla. 1st DCA 1997) (holding that a doctor’s testimony did not constitute competent substantial evidence as to causation because it was based on speculation, made without knowledge of claimant’s relevant medical history, and based “virtually entirely” upon claimant’s false report of causal connection between the accident and a subsequent surgery); In re Paoli R. R. Yard PC’B Litigation, 35 F.3d 717 (3d Cir. 1994) (holding that for purposes of determining admissibility of expert medical testimony, part of differential diagnosis is using standard techniques to rule out alternative causes and, thus, where defendant points to a plausible alternative cause and the doctor offers no explanation for why he or she has concluded that was not the sole cause, the doctor’s methodology is unreliable); Berry v. CSX Transp. Inc., 709 So.2d 552, 571 (Fla. 1st DCA 1998) (holding that expert witness’ testimony regarding causation of a railroad employee’s malady was admissible in toxic tort litigation, as the expert employed a scientifically acceptable differential diagnosis method in an attempt to eliminate other possible causes of symptoms and his opinion was not based upon the employee’s personal history, medical records, physical examinations, and medical tests, but upon sufficient epidemiological data, facts, and personal observations); David v. Nat’l R.R. Passenger Corp., 801 So. 2d 223, 227 (Fla. 2d DCA 2001).

On the other hand, in the recent Broward County case, we argued that the defendants’ experts could opine regarding issues of causation because they actually applied standard techniques of differential diagnosis through the review of prior medical records, examinations, diagnostic films, discovery, depositions, investigation, statements, and photographs.

The Circuit Court in Broward County granted the defendants’ motion in limine to preclude causation opinions from the plaintiff’s treating non-retained physician. In our case, we had the perfect storm of the physician not having taken a history as to how the incident occurred or how the alleged injuries were caused by the incident, coupled with the plaintiff’s attorney not having provided any other treatment records to the physician, as well as the physician’s concession that he was not retained to provide an opinion on permanency. However, based on the case law, the argument to preclude opinion testimony by a treating physician as to causation and permanency should not hinge on whether the latter concession is made by the physician during deposition. 

*Tom is special counsel in our Orlando, Florida, office. He can be reached at (407) 420-4418 or tjslogar@mdwcg.com. Frank Madia is an associate in our Orlando office who can be reached at (407) 420-4410 or flmadia@mdwcg.com. Heather, also in our Orlando office, is an associate who can be reached at (407) 505-4680 or HCTruitt@mdwcg.com. 


 

Defense Digest, Vol. 30, No. 1, March 2024, is prepared by Marshall Dennehey to provide information on recent legal developments of interest to our readers. This publication is not intended to provide legal advice for a specific situation or to create an attorney-client relationship. ATTORNEY ADVERTISING pursuant to New York RPC 7.1. © 2024 Marshall Dennehey. All Rights Reserved. This article may not be reprinted without the express written permission of our firm. For reprints, contact tamontemuro@mdwcg.com.

Firm Highlights

Thought Leadership

NJ Workers' Compensation Legislation Update

A couple more bills were introduced for the 2026-27 session. Any updates since February have been highlighted in bold. A1023 | S3984 Medical use of cannabis under certain circumstances This requires workers’ compensation, PIP, and health insurance coverage for the medical use of cannabis under certain circumstances. It was introduced on January 13, 2026 and referred to the Assembly Financial Institutions and Insurance Committee. It was also introduced on March 19, 2026 and referred to the Senate Commerce Committee. A1045 Certain injuries to volunteer and professional public safety and law enforcement personnel This revises workers’ compensation coverage for certain injuries to volunteer and professional public safety and law enforcement personnel. It was introduced on January 13, 2026 and referred to the Assembly Labor Committee. A3724 Personal liability to employer officers for failure to pay for coverage This provides personal liability for owner, executive officer, or executive director of employer for failure to pay for workers' compensation coverage. It was introduced on January 13, 2026 and referred to the Assembly Labor Committee. On May 7, 2026, it was reported and referred to Assembly Judiciary Committee. A4617 Certain workers' compensation supplemental benefits and funding method This concerns certain workers' compensation supplemental benefits and funding method. For a permanently and totally disabled worker or surviving dependents after December 31, 1979, with some exceptions, this bill provides for an annual cost of living adjustment in the weekly workers’ compensation benefit rate. It was introduced on March 10, 2026, and referred to the Assembly Labor Committee. S241 Inclusion in database of appointed officials This requires that workers’ compensation judges and administrative law judges be included in database of appointed officials. It was introduced on January 13, 2026 to the Senate, Referred to Senate State Government, Wagering, Tourism & Historic Preservation Committee. A1870 | S1379 Workers' compensation benefits for certain workers due to September 11, 2001, terrorist attacks This provides workers’ compensation benefits for certain public safety workers who developed illness or injury as result of responding to September 11, 2001 terrorist attacks. It was introduced on January 13, 2026 and referred to the Assembly Labor Committee. It was also introduced on the same day and referred to the Senate Labor Committee. On February 5, 2026, it was reported from the Senate Committee, 2nd Reading, and referred to the Senate Budget and Appropriations Committee. A2779 | S1521 Excludes Certain Illegal Aliens This excludes certain illegal aliens from workers’ compensation and temporary disability benefits. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. A2792 | S1555 Prevent Intoxicated Employees from Workers’ Compensation This prevents intoxicated employees from receiving workers’ compensation. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. S2290 Increase Mandatory Retirement Age This increases statutory mandatory retirement age for Supreme Court Justices, Superior Court Judges, Tax Court Judges, Administrative Law Judges, and Workers’ Compensation Judges from 70 to 72. It was introduced on January 13, 2026, and referred to the Senate Judiciary Committee. A3167 | S2372 Workers’ compensation insurance requirements for certain corporations and partnerships. This concerns workers’ compensation insurance requirements for certain corporations and partnerships. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. A1384 | S2757 Reduce Statute of Limitations in Medical Fee Disputes This reduces statute of limitations from six years to two years in medical fee disputes in workers’ compensation matters. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. S3144 Testimony in Workers’ Compensation This concerns submission of testimony in workers’ compensation claims. It was introduced on January 13, 2026, and referred to the Senate Labor Committee. S3342 Increase Mandatory Retirement Age This increases statutory mandatory retirement age for Supreme Court Justices, Superior Court Judges, Tax Court Judges, Administrative Law Judges, and Workers’ Compensation Judges from 70 to 75. It was introduced on February 5, 2026, and referred to the Senate Judiciary Committee. A3548 | S3571 Maximum benefits for certain volunteers This provides certain volunteer and other workers with maximum compensation benefit for workers' compensation claim regardless of outside employment.. It was introduced on January 13, 2026 and referred to the Senate Labor Committee. On March 2, 2026, it was reported from the Senate Committee, 2nd Reading, and referred to the Senate Budget and Appropriations Committee. It was also introduced on the same day and referred to the Assembly Labor Committee. On May 7, 2026, it was reported and referred to Assembly State and Local Government Committee.

Thought Leadership

What’s Hot in Workers’ Comp - News and Results*

RESULTS* Ben Durstein (Wilmington) obtained a favorable decision involving a claimant who fractured his patella in a work accident requiring two surgeries. The IAB rejected the claimant’s medical expert’s opinion that he sustained a 25% permanent impairment to the right lower extremity. Instead, the board accepted the opinion of the employer’s medical expert that the appropriate permanency was 13% utilizing the 6th Edition of the AMA Guides to the Evaluation of Permanent Impairment. Tony Natale III (King of Prussia) successfully had a claim petition alleging new injuries and periods of disability dismissed based on full recovery. The claimant was injured when his skid loader was struck by another loader in the process of baling hay. Original injuries were accepted and the claimant returned to work. Thereafter, the claimant abandoned work and filed a claim petition to assert new injuries and extended disability. Cross examination of the claimant’s medical expert stunningly revealed his failure to review claimant testimony, his lack of awareness of a social security disability decision detailing the existence of claimant’s alleged work-related conditions prior to the date of work injury, and his failure to understand that the claimant admitted to full recovery of injuries for which he was continuing to treat. Tony Natale III (King of Prussia) successfully obtained a defense verdict in a Medicare conditional payment lien third level appeal. The United States government alleged a Medicare conditional lien payment was due and owing in the upper six-figure range based on an auto accident and PIP policy for which the government conditionally became the primary carrier. The government argued that our client, the PIP carrier, was the primary payer and, under federal law, must reimburse the government for its conditional lien payment. At the third-level appeal hearing, the government’s position was refuted by the revelation that the date of injury tied to the medical bills associated with the lien was glaringly and chronologically prior to the insurer’s PIP policy date. The court held that based on this evidence and argument, the government could not meet its requirements to assert a lien against our client. A. Judd Woytek (King of Prussia) and John Abda (Scranton) successfully had a workers’ compensation claim petition granted for medical benefits only for a closed period with no wage loss awarded. The claimant alleged multiple injuries as the result of a very minor motor vehicle incident where a co-worker’s delivery van rolled down an incline of approximately six feet, and bumped into the rear of the claimant’s delivery van. He claimed he was thrown forward and suffered head and neck injuries, along with aggravating a pre-existing ankle injury. The claimant was also terminated following the accident for having a large hunting knife in his van, which was against the employer’s workplace violence policy. The judge granted the claim for a mild concussion and an ankle contusion, but terminated medical benefits as of the date of our IME’s. The judge found that no wage loss benefits were payable as the claimant was terminated for cause and work remained available to him. The judge found our medical experts to be more credible than the claimant’s, along with finding our four employer witnesses to all be credible. The trial team was assisted by paralegal Bonnie Zemek (King of Prussia). Eric Scott Thompson (Wilmington) was successful in a workers’ compensation matter in Delaware. On October 15, 2024, the claimant was injured while performing fire training in a multistory building when he tripped over a fire line, injuring his right knee. The claimant received regular and consistent treatment for the right knee through August 29, 2025, when he presented with left knee complaints for the first time. His treating orthopedist diagnosed a hamstring strain. The claimant was next seen October 15, 2025, with continued left knee complaints, and was referred to a total knee doctor within the practice. He was then diagnosed with a posterior root tear of the medial meniscus. Our expert testified that it was not plausible for a lateral hamstring strain to progress to a meniscal tear in two months. The claimant required a total knee replacement that was ultimately performed in February 2026. In the six months between the time of initial presentation with left knee complaints and the total knee replacement, conservative care consisted of a single injection. Our expert testified that posterior root media meniscal tears can respond to conservative care, and it was not known if it would with the claimant because it was not adequately explored. The Industrial Accident Board agreed with our expert and determined that the claimant failed to meet the burden of establishing more likely than not that the left knee complaints were caused by overloading/overuse as a result of the compensable injury to the right knee. They also agreed that the claimant was able to return to work in a sedentary capacity as opined by his physicians and our expert prior to the left total knee replacement and that there were employment opportunities available within his restrictions and capabilities as presented by the vocational expert. As a result, the claimant was no longer entitled to total disability benefits and will receive partial disability benefits for which he is limited to 300 weeks. Michele Punturi (Philadelphia) and Alana Staniszewski (Pittsburgh) had a termination petition granted in a Pennsylvania workers’ compensation case. The petition involved an echocardiography technologist with long-term employment at a local hospital who sustained a right shoulder injury resulting in surgery in January 2024. Following surgery, the claimant was diagnosed with a frozen shoulder and underwent additional surgery in June 2024, with a recommendation for a third surgery. The opinions of the defense medical expert, a Board-certified orthopedic surgeon, were found credible, persuasive, and competent based upon the extensive history he obtained from the claimant, analysis of the mechanism of injury, and review of records, along with comparison of MRIs from October 2023, February 11, 2024, and January 6, 2025, which failed to reveal any causal relationship other than a strain/sprain of the right shoulder. This evidence supported that the claimant had fully recovered, and was not in need of any ongoing medical treatment and/or restrictions. In particular, despite allegations of injuries beyond a sprain/strain, the defense medical expert identified that those allegations were not consistent with what was found at the time of surgery, and elements of the surgery were to treat a chronic and degenerative condition. Additionally there were no ongoing issues or problems with the subscapularis, which was intact, consistent with the follow-up MRI of February 11, 2024, and the claimant did not have evidence of a frozen shoulder. In fact, the MRIs and mechanism of injury, he opined, did not support any injury causing tendonitis or inflammatory conditions within the bicep tendon. Furthermore, multiple days of surveillance footage demonstrated the claimant’s normal use, with the ability to sweep and shovel snow, operate her vehicle, raise her arms above shoulder level, and use a broom – all without any observable difficulty, which challenged the claimant’s credibility of a disability and further established a lack of causation. As a result of this favorable decision, supersedeas fund reimbursement will be obtained for both wage loss and medical benefits through the supersedeas fund recovery process. *Prior Results Do Not Guarantee a Similar Outcome NEWS Heather Carbone (Jacksonville) was a panelist for a webinar hosted by The Workers’ Compensation Claims Professionals (WCCP) Association. As part of the “Meet the Experts” Series, the speakers addressed “Afterthoughts that Undermine a Successful Mediation,” highlighting the pitfalls and challenges of underprepared or unprepared mediation participants. The discussion included appropriate pre-mediation communications, setting of expectations, management of expectations, and working through the unexpected or unprepared. Attendees gained ideas about how and when to prepare, best practices, and the potential for non-parties (spouse, significant other, risk owners-insurers) to have differing perspectives or concerns than the actual employee and employer. On May 21-22, 2026, A. Judd Woytek, (King of Prussia) joined a panel at the CLM Alliance (Claims and Litigation Management Alliance) Work Comp Conference in Nashville to present "We See You: How Employee Engagement Enhances Work Comp Outcomes." Judd and his fellow panelists discussed the positive impact of employee engagement on claim outcomes, return-to-work timelines, and overall claim costs.

Result

No-Cause Jury Verdict Secured in Wrongful Death Trial

We successfully obtained a no-cause jury verdict in a 13-day wrongful death trial. The decedent, a 59-year-old man, was admitted to the emergency room on February 15, 2019, with complaints of abdominal pain, decreased appetite, and constipation, despite the use of laxatives. The patient did not complain of any nausea, vomiting, or diarrhea. He had a significant medical history including diabetes, hypertension, prior coronary artery stenting, morbid obesity (with past gastric bypass surgery), longstanding ventral hernia, and back pain. A CT scan revealed multiple hernias and a potential closed-loop bowel obstruction, leading to a surgery consultation. Our client, an emergency general surgeon, interpreted that the patient did not have a closed loop or any significant obstruction and recommended non-surgical management. The patient was approved to have clear liquids, and had a vomiting incident shortly after, but our client was not notified. The patient was returned to NPO status, and after improving overnight, he was returned to “clears” and additional medical and renal consults were ordered. Our client did not receive any communications from the residents/nurses of any changes in the patient’s condition. On February 18, 2019, two rapid responses were called due to increased heart rate and vomiting. It is believed that the vomiting resulted in aspiration, causing sepsis, ultimately leading to the patient’s death. During the trial, the plaintiff’s sole medical expert highlighted imaging on the wrong hernia, which called into question all of his opinions in the case. We made key objections related to the expert testimony, limiting what the allegations were, and preventing new allegations from being made. After approximately two and a half hours of deliberating, the jury returned a no-cause verdict.