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The expert
Expert journals and treatises

The expert

By Jason Tenenbaum 8 min read

Key Takeaway

New York court ruling in Kohler v Barker explores the boundaries of expert witness testimony and how far attorneys can push expert opinions in personal injury cases.

This article is part of our ongoing expert journals and treatises coverage, with 7 published articles analyzing expert journals and treatises issues across New York State. Attorney Jason Tenenbaum brings 24+ years of hands-on experience to this analysis, drawing from his work on more than 1,000 appeals, over 100,000 no-fault cases, and recovery of over $100 million for clients throughout Nassau County, Suffolk County, Queens, Brooklyn, Manhattan, and the Bronx. For personalized legal advice about how these principles apply to your specific situation, contact our Long Island office at (516) 750-0595 for a free consultation.

Expert witness testimony plays a crucial role in personal injury litigation, often serving as the bridge between complex technical concepts and jury understanding. However, the line between legitimate expert analysis and inadmissible speculation can sometimes blur, particularly when attorneys attempt to maximize the impact of their hired experts. A recent New York appellate decision provides valuable insight into how courts evaluate the admissibility and scope of expert testimony, especially when one party challenges whether an expert has overstepped professional boundaries.

The case highlights the ongoing tension in litigation between zealous advocacy and the evidentiary rules that govern what experts can and cannot tell a jury. Understanding these boundaries is essential for both attorneys and clients involved in personal injury cases where technical or professional expertise is needed to establish liability or damages.

Jason Tenenbaum’s Analysis:

Kohler v Barker, 2017 NY Slip Op 01344 (2d Dept. 2017)

“The admissibility and scope of expert testimony is a determination within the discretion of the trial court (see Price v New York City Hous. Auth., 92 NY2d 553, 558; Doviak v Finkelstein & Partners, LLP, 137 AD3d 843, 847; Galasso v 400 Exec. Blvd., LLC, 101 AD3d 677, 678). Generally, expert opinion is proper when it would help clarify an issue calling for professional or technical knowledge, possessed by the expert and beyond the ken of the typical juror (see De Long v County of Erie, 60 NY2d 296, 307; Matter of Islam v Lee, 115 AD3d 952, 953). Here, the Supreme Court did not improvidently exercise its discretion in admitting the testimony of the defendants’ expert. Contrary to the plaintiff’s contention, the testimony of the defendants’ expert was based on facts in the record and his own analysis, not speculation”

This is another expert witness case. Worth seeing how far you can push the envelope with the hired witness.

Key Takeaway

The Second Department reaffirmed that trial courts have broad discretion in determining the admissibility of expert testimony. The key distinction lies in whether the expert’s opinions are grounded in factual evidence and professional analysis rather than mere speculation. This case demonstrates that aggressive use of expert witnesses can be successful when their testimony remains tethered to the factual record.

Legal Context

Why This Matters for Your Case

New York law is among the most complex and nuanced in the country, with distinct procedural rules, substantive doctrines, and court systems that differ significantly from other jurisdictions. The Civil Practice Law and Rules (CPLR) governs every stage of civil litigation, from service of process through trial and appeal. The Appellate Division, Appellate Term, and Court of Appeals create a rich and ever-evolving body of case law that practitioners must follow.

Attorney Jason Tenenbaum has practiced across these areas for over 24 years, writing more than 1,000 appellate briefs and publishing over 2,353 legal articles that attorneys and clients rely on for guidance. The analysis in this article reflects real courtroom experience — from motion practice in Civil Court and Supreme Court to oral arguments before the Appellate Division — and a deep understanding of how New York courts actually apply the law in practice.

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Expert analysis of medical records discovery rights in NY personal injury cases. L.T. v Teva Pharms case study. Call (516) 750-0595 for consultation.

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New York court guidance on expert competency and medical literature use in medical malpractice and no-fault cases. Essential reading for Long Island attorneys.

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Expert Testimony and Medical Journals: Navigating New York Courts

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View all Expert journals and treatises articles

Common Questions

Frequently Asked Questions

Can medical journals and treatises be used as evidence in New York?

Under New York law, learned treatises and medical journals can be used during cross-examination of expert witnesses to challenge their opinions. However, they generally cannot be introduced as independent evidence. The expert must acknowledge the authority of the text or it must be established through other testimony.

How are expert journals used in no-fault cases?

In no-fault litigation, medical journals and peer-reviewed studies are commonly referenced in peer review reports and IME findings to support or challenge medical necessity determinations. They help establish the standard of care and accepted treatment protocols.

What is the Frye standard for expert testimony in New York?

New York follows the Frye standard (not Daubert) for expert testimony. Under Frye v. United States, expert testimony based on scientific principles must be shown to be generally accepted in the relevant scientific community. This standard applies to novel scientific evidence and methodologies.

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Attorney Jason Tenenbaum

About the Author

Jason Tenenbaum, Esq.

Jason Tenenbaum is the founding attorney of the Law Office of Jason Tenenbaum, P.C., headquartered at 326 Walt Whitman Road, Suite C, Huntington Station, New York 11746. With over 24 years of experience since founding the firm in 2002, Jason has written more than 1,000 appeals, handled over 100,000 no-fault insurance cases, and recovered over $100 million for clients across Long Island, Nassau County, Suffolk County, Queens, Brooklyn, Manhattan, the Bronx, and Staten Island. He is one of the few attorneys in the state who both writes his own appellate briefs and tries his own cases.

Jason is admitted to practice in New York, New Jersey, Florida, Texas, Georgia, and Michigan state courts, as well as multiple federal courts. His 2,353+ published legal articles analyzing New York case law, procedural developments, and litigation strategy make him one of the most prolific legal commentators in the state. He earned his Juris Doctor from Syracuse University College of Law.

24+ years in practice 1,000+ appeals written 100K+ no-fault cases $100M+ recovered

Disclaimer: This article is published by the Law Office of Jason Tenenbaum, P.C. for informational and educational purposes only. It does not constitute legal advice, and no attorney-client relationship is formed by reading this content. The legal principles discussed may not apply to your specific situation, and the law may have changed since this article was last updated.

New York law varies by jurisdiction — court decisions in one Appellate Division department may not be followed in another, and local court rules in Nassau County Supreme Court differ from those in Suffolk County Supreme Court, Kings County Civil Court, or Queens County Supreme Court. The Appellate Division, Second Department (which covers Long Island, Brooklyn, Queens, and Staten Island) and the Appellate Term (which hears appeals from lower courts) each have distinct procedural requirements and precedents that affect litigation strategy.

If you need legal help with a expert journals and treatises matter, contact our office at (516) 750-0595 for a free consultation. We serve clients throughout Long Island (Huntington, Babylon, Islip, Brookhaven, Smithtown, Riverhead, Southampton, East Hampton), Nassau County (Hempstead, Garden City, Mineola, Great Neck, Manhasset, Freeport, Long Beach, Rockville Centre, Valley Stream, Westbury, Hicksville, Massapequa), Suffolk County (Hauppauge, Deer Park, Bay Shore, Central Islip, Patchogue, Brentwood), Queens, Brooklyn, Manhattan, the Bronx, Staten Island, and Westchester County. Prior results do not guarantee a similar outcome.

Jason Tenenbaum, Personal Injury Attorney serving Long Island, Nassau County and Suffolk County

About the Author

Jason Tenenbaum

Jason Tenenbaum is a personal injury attorney serving Long Island, Nassau & Suffolk Counties, and New York City. Admitted to practice in NY, NJ, FL, TX, GA, MI, and Federal courts, Jason is one of the few attorneys who writes his own appeals and tries his own cases. Since 2002, he has authored over 2,353 articles on no-fault insurance law, personal injury, and employment law — a resource other attorneys rely on to stay current on New York appellate decisions.

Education
Syracuse University College of Law
Experience
24+ Years
Articles
2,353+ Published
Licensed In
7 States + Federal

Legal Resources

Understanding New York Expert journals and treatises Law

New York has a unique legal landscape that affects how expert journals and treatises cases are litigated and resolved. The state's court system includes the Civil Court (for claims up to $25,000), the Supreme Court (the primary trial court for unlimited jurisdiction), the Appellate Term (which hears appeals from lower courts), the Appellate Division (divided into four Departments, with the Second Department covering Long Island, Brooklyn, Queens, Staten Island, and several upstate counties), and the Court of Appeals (the state's highest court). Each court has its own procedural requirements, local rules, and case-assignment practices that can significantly impact the outcome of your case.

For expert journals and treatises matters on Long Island, cases are typically filed in Nassau County Supreme Court (at the courthouse in Mineola) or Suffolk County Supreme Court (in Riverhead). No-fault arbitrations are heard through the American Arbitration Association, which assigns arbitrators throughout the metropolitan area. Workers' compensation claims go to the Workers' Compensation Board, with hearings at district offices across the state. Understanding which forum is appropriate for your case — and the specific procedural rules that apply — is essential for a successful outcome.

The procedural landscape in New York also includes important timing requirements that can affect your case. Most civil actions are subject to statutes of limitations ranging from one year (for intentional torts and claims against municipalities) to six years (for contract actions). Personal injury cases generally have a three-year deadline under CPLR 214(5), while medical malpractice claims must be filed within two and a half years under CPLR 214-a. No-fault insurance claims have their own regulatory deadlines, including 30-day filing requirements for applications and 45-day deadlines for provider claims. Understanding and complying with these deadlines is critical — missing a filing deadline can permanently bar your claim, regardless of how strong your case may be on the merits.

Attorney Jason Tenenbaum regularly practices in all of these venues. His office at 326 Walt Whitman Road, Suite C, Huntington Station, NY 11746, is centrally located on Long Island, providing convenient access to courts and offices throughout Nassau County, Suffolk County, and New York City. Whether you need representation in a no-fault arbitration, a personal injury trial, an employment discrimination hearing, or an appeal to the Appellate Division, the Law Office of Jason Tenenbaum, P.C. brings $24+ years of real courtroom experience to your case. If you have questions about the legal issues discussed in this article, call (516) 750-0595 for a free, no-obligation consultation.

New York's substantive law also presents distinct challenges. In motor vehicle cases, the no-fault system under Insurance Law Article 51 provides first-party benefits regardless of fault, but limits the right to sue for non-economic damages unless the plaintiff establishes a "serious injury" under one of nine statutory categories. This threshold — codified at Insurance Law Section 5102(d) — requires medical evidence showing more than a minor or subjective injury, and courts have developed detailed standards for each category. Fractures must be documented through imaging studies. Claims of permanent consequential limitation or significant limitation of use require quantified range-of-motion testing with comparison to norms. The 90/180-day category demands proof that the plaintiff was unable to perform substantially all of their usual daily activities for at least 90 of the 180 days following the accident.

In employment discrimination cases, the legal standards vary depending on whether the claim arises under state or local law. The New York State Human Rights Law employs a burden-shifting framework: the plaintiff must first establish a prima facie case by showing membership in a protected class, qualification for the position, an adverse employment action, and circumstances giving rise to an inference of discrimination. The burden then shifts to the employer to articulate a legitimate, non-discriminatory reason for its decision. If the employer meets this burden, the plaintiff must demonstrate that the stated reason is pretextual. The New York City Human Rights Law, by contrast, applies a broader standard, asking whether the plaintiff was treated less well than other employees because of a protected characteristic.

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