Key Takeaway
New York appellate court decisions show inconsistent rulings on no-fault insurance medical necessity and causation claims, highlighting unpredictable outcomes.
This article is part of our ongoing causation coverage, with 345 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.
Perhaps the only thing worse than leaving your fate in the hands of the Civil Court is to leave your fate at the mercy of the Appellate Division. I say this not in a disparaging way; it just bespeaks the randomness of the decisions that come from these Courts.
Those who have been in this business awhile (>10 years) can tell you that cases you didn’t think you should win you won, and those cases that you should have won, you did not win.
This occurred to me in the last month. An appeal that I perfected due to frustration and without much legal precedent was a victory for me. (Koyachman v Paige Mgt. & Consulting, LLC, 121 A.D.3d 951 ). I was beyond shocked to have won Koyachman. The failure to serve an OSC as directed in the order mandates the denial; yet, there is now a Koyachman exception.
Yesterday, the court despite granting similar relief to Plaintiff on similar affidavits in Mercury Cas. Co. v Surgical Ctr. at Milburn, LLC, 65 AD3d 1102 (2d Dept. 2009), denied similar relief in Interboro v. Johnson. In both of these cases, the insurance carrier solely relied upon a radiological review. Compare Stephen Fealy, M.D., P.C. v State Farm Mut. Auto Ins. Co.. 28 Misc.3d 136(A)(App. Term 2d Dept. 2010)(finding prima facie entitlement to summary judgment on causation based upon radiological review)
Compare this to Shahid Mian, M.D., P.C. v Interboro Ins. Co., 39 Misc.3d 135(A)(App. Term 1st Dept. 2013), where the carrier relied upon a radi0logical review and a peer review to dispute the causal relationship between the accident the treatment, and the Court dismissed the complaint.
A similar instance of this disconnection between cases with similar records is the Appellate Term holding that a low-impact study cannot disprove causation (Bronx Radiology, P.C. v New York Cent. Mut. Fire Ins. Co.. 17 Misc.3d 97 ), while another Appellate Term held that the low impact study was not only sufficient to raise an issue of fact; but was sufficient to prima facie prove lack of causation. Andromeda Med. Care, P.C. v Utica Mut. Ins. Co., 34 Misc.3d 153(A)(App. Term 2d Dept. 2012)
Or, how about the Appellate Term which held a conclusory affidavit was insufficient to defeat a medical necessity motion (Utica Acupuncture, P.C. v Interboro Ins. Co., 39 Misc.3d 139), yet allowed the same type of conclusory affidavit to defeat the motion. Arnica Acupuncture P.C. v Interboro Ins. Co., 43 Misc.3d 130(A)(App. Term 1st Dept. 2014)
So Johnson is another example of placing your fate with the Appellate Division and hoping for the best.
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Legal Update (February 2026): Since this 2014 post discussing appellate court decisions on medical necessity and causation standards, there have been subsequent appellate decisions that may have further refined or modified the legal standards applied in similar cases. Additionally, regulatory changes to no-fault insurance coverage requirements and medical necessity determinations may have occurred. Practitioners should verify current appellate precedents and regulatory provisions when evaluating causation and coverage disputes.
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.
345 published articles in Causation
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Jan 13, 2010Common Questions
Frequently Asked Questions
How is causation established in New York personal injury cases?
Causation requires proof that the defendant's conduct was a substantial factor in causing the plaintiff's injuries. In motor vehicle and slip-and-fall cases, medical experts typically establish causation through review of the patient's medical history, diagnostic imaging, clinical examination findings, and the temporal relationship between the accident and the onset of symptoms. The plaintiff must also address any pre-existing conditions and demonstrate that the accident was a proximate cause of the current complaints.
What are common coverage defenses in no-fault insurance?
Common coverage defenses include policy voidance due to material misrepresentation on the insurance application, lapse in coverage, the vehicle not being covered under the policy, staged accident allegations, and the applicability of policy exclusions. Coverage issues are often treated as conditions precedent, meaning the insurer bears the burden of proving the defense. Unlike medical necessity denials, coverage defenses go to whether any benefits are owed at all.
What happens if there's no valid insurance policy at the time of the accident?
If there is no valid no-fault policy covering the vehicle, the injured person can file a claim with MVAIC (Motor Vehicle Accident Indemnification Corporation), which serves as a safety net for people injured in accidents involving uninsured vehicles. MVAIC provides the same basic economic loss benefits as a standard no-fault policy, but the application process has strict requirements and deadlines.
What is policy voidance in no-fault insurance?
Policy voidance occurs when an insurer declares that the insurance policy is void ab initio (from the beginning) due to material misrepresentation on the application — such as listing a false garaging address or failing to disclose drivers. Under Insurance Law §3105, the misrepresentation must be material to the risk assumed by the insurer. If the policy is voided, the insurer has no obligation to pay any claims, though the burden of proving the misrepresentation falls on the insurer.
How does priority of coverage work in New York no-fault?
Under 11 NYCRR §65-3.12, no-fault benefits are paid by the insurer of the vehicle the injured person occupied. For pedestrians and non-occupants, the claim is made against the insurer of the vehicle that struck them. If multiple vehicles are involved, regulations establish a hierarchy of coverage. If no coverage is available, the injured person can apply to MVAIC. These priority rules determine which insurer bears financial responsibility and are frequently litigated.
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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.
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 causation 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.