Key Takeaway
Malloy reinstated a right-knee injury claim based on supported medical opinions. Read the 2010 causation ruling and its limits for no-fault practice.
This article is part of our ongoing causation coverage, with 178 published articles analyzing causation 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.
The right-knee claim survived in Malloy v Matute, 79 AD3d 584 (2010). The First Department reinstated that part of the personal-injury action after finding a factual dispute over causation; it otherwise affirmed the order.
Legal Update (September 2026): Chapter 58 of 2026, Part EE §§ 1 and 4 removed the 90/180-day serious-injury category for actions and proceedings commenced on or after May 26, 2026; the historical decision discussed here predates that amendment.
Last reviewed: September 2026.
Why the knee evidence was enough for a trial
The defense experts described degeneration. The plaintiff’s physicians connected the knee injuries to the collision through their examinations, MRI results and the conditions requiring surgery. The court also considered the plaintiff’s age, the impact on his right side, the absence of prior right-knee problems and surgery within four months of the accident.
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Surgery alone did not establish causation, and the physicians’ phrase “sole competent producing cause” was not announced as mandatory wording for every expert. Their medical explanation created a triable issue; it did not establish the plaintiff’s entitlement to damages.
Jason’s original introduction below drew an analogy to no-fault practice. Malloy decided a tort serious-injury motion. It did not decide a provider’s entitlement to reimbursement or require every no-fault case to follow the same proof sequence.
Jason’s original 2010 commentary
Jason’s December 2010 introduction is preserved below. Its no-fault comparison and prediction of a defense motion are advocacy observations; the verified holding concerns the right-knee tort claim.
With the uptick in surgeries that are taking place in no-fault practice, the question that every claims representative or defense attorney evaluating these types of cases needs to ask is: “was this injury causally related to the accident?”
As a Plaintiff’s attorney, the question you need to ask, in response to this, is how do you at least raise a triable issue of fact when faced with what should be the inevitable summary judgment motion from the defense attorney.
This is a case from the First Department, where in my opinion, they lay out how a plaintiff needs to address this type of defense.
Connect to the Encyclopedia
Start with the pre-existing injuries and causation topic hub.
- Khanfour: reconcile earlier and later range-of-motion findings
- Shah: the defense expert’s unexplained post-accident ROM loss
- Donoso: missing causal proof at trial, distinguished from stipulated no-fault records
- Cariddi: the basis of an expert opinion and missing records
For review of a particular dispute, contact the firm.
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.
About This Topic
Causation in New York Personal Injury & No-Fault Law
Causation — proving that the defendant's negligence or the accident caused the plaintiff's injuries — is an essential element of every personal injury and no-fault claim. New York courts distinguish between proximate cause, intervening causes, and pre-existing conditions that may have been aggravated by an accident. The legal standards for establishing causation through medical evidence and the defenses available to challenge causal connection are analyzed in depth across these articles.
178 published articles in Causation
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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.
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