Key Takeaway
Court ruling demonstrates that medical conditions can evolve over time, challenging the emphasis on immediate post-accident medical examinations in necessity determinations.
This article is part of our ongoing medical necessity coverage, with 170 published articles analyzing medical necessity 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.
Understanding Medical Necessity and the Evolution of Injuries Over Time
In New York’s no-fault insurance system, determining medical necessity often hinges on various factors, including the timing of medical examinations and treatments. Insurance companies and defense attorneys frequently argue that medical conditions must be documented immediately after an accident to be considered legitimate. However, a recent First Department decision challenges this rigid approach, recognizing that injuries can develop and change significantly over time.
This principle is particularly important in New York No-Fault Insurance Law cases, where the timing and documentation of medical conditions can make or break a claim. The evolving nature of injuries is a critical consideration that courts must weigh when evaluating medical necessity disputes, especially when medical necessity reversals are at stake.
The medical necessity standard in New York requires that treatment be appropriate and necessary for the diagnosis and treatment of injuries sustained in a covered accident. Insurance carriers often rely heavily on independent medical examinations conducted weeks or months after an accident, then argue that any differences between the contemporaneous findings and later examinations indicate fraud or unrelated conditions. This approach ignores basic medical science: injuries evolve, conditions worsen or improve, and the human body’s response to trauma is not static.
Case Background
In Hayes v Gaceur, plaintiff sought to establish serious injury under New York’s Insurance Law Section 5102(d) following a motor vehicle accident. The defendant insurance company challenged the plaintiff’s claimed injuries to her cervical spine, shoulders, and left knee, arguing that the medical evidence was inconsistent and that delays in treatment undermined the causal connection to the accident.
The procedural posture placed the burden on plaintiff to raise a triable issue of fact as to whether she sustained a serious injury. The defendant had moved for summary judgment, arguing that plaintiff’s injuries did not meet the statutory threshold. The First Department’s analysis focused on whether the medical evidence presented genuine questions requiring trial resolution.
Jason Tenenbaum’s Analysis:
Hayes v Gaceur, 2018 NY Slip Op 04080 (1st Dept. 2018)
“In opposition, however, plaintiff raised an issue of fact as to her claimed cervical spine, shoulder and left knee injuries through the report of her treating orthopedic surgeon. The physician examined plaintiff the day after the accident and on several occasions thereafter. He found limitations in range of motion of her cervical spine the day after the accident and on recent examination; he examined plaintiff’s shoulders and left knee within a month after the accident and found limitations in range of motion at the initial examination and recently (see Perl v Meher, 18 NY3d 208, 218 [“Injuries can become significantly more or less severe as time passes”]“
Legal Significance: The Perl v Meher Principle
The First Department’s citation to Perl v Meher represents a critical acknowledgment of medical reality in personal injury litigation. The Court of Appeals in Perl explicitly recognized that injuries are not frozen in time at the moment of impact. Rather, medical conditions naturally progress, regress, or fluctuate based on numerous factors including the severity of initial trauma, the effectiveness of treatment, patient compliance, and individual physiological responses.
This principle fundamentally challenges the insurance industry’s preference for contemporaneous medical examinations as the sole reliable indicator of injury. While immediate post-accident examinations provide valuable baseline information, they cannot predict or preclude later developments. A patient may appear to have minor injuries in the emergency room, only to develop significant complications days or weeks later as inflammation sets in, soft tissue damage manifests, or biomechanical changes create secondary injuries.
The Hayes decision also addresses the evidentiary weight of treating physician testimony. Unlike independent medical examiners who conduct one-time evaluations, treating physicians have the advantage of longitudinal observation. They witness the injury’s trajectory over time, document treatment responses, and can provide informed opinions about causation based on clinical relationships developed through ongoing care.
Practical Implications for Practitioners
For attorneys representing injured parties, this decision provides critical support when defending against challenges based on timing discrepancies. When insurance companies argue that delayed diagnosis or treatment gaps undermine causation, practitioners can point to the evolving nature of injuries recognized in Hayes and Perl.
However, practitioners must still ensure their medical evidence adequately bridges any temporal gaps. The treating physician’s report should specifically address: (1) the initial findings, (2) the progression or changes observed over time, (3) the clinical reasoning connecting later findings to the original accident, and (4) why the injury’s evolution is consistent with the mechanism of injury and expected medical course.
Defense attorneys, conversely, should focus their challenges on whether the medical evidence actually demonstrates a coherent evolution of injury or whether unexplained gaps, inconsistent complaints, or intervening events suggest alternative explanations for the patient’s current condition.
Key Takeaway
The Hayes decision reinforces that medical conditions are not static and can evolve substantially over time. Courts recognize that the absence of immediate, comprehensive documentation does not automatically invalidate later-discovered or worsening conditions. This principle protects injured parties whose conditions may not manifest fully until days, weeks, or even months after an accident.
Related Articles
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
Medical Necessity Disputes in No-Fault Insurance
Medical necessity is the most common basis for no-fault claim denials in New York. Insurers hire peer reviewers to opine that treatment was not medically necessary, shifting the burden to providers and claimants to demonstrate otherwise. The legal standards for establishing and rebutting medical necessity — including the sufficiency of peer review reports, the qualifications of reviewing physicians, and the evidentiary burdens at arbitration and trial — are the subject of extensive case law. These articles provide detailed analysis of medical necessity litigation strategies and court decisions.
170 published articles in Medical Necessity
Keep Reading
More Medical Necessity Analysis
MUA is dangerous
Court finds MUA treatment too aggressive without proper foundation. Expert testimony on medical necessity prevails in no-fault insurance dispute.
Mar 17, 2021
Another Medical Necessity?
New York court finds conflicting medical opinions create triable issue on physical therapy necessity, despite provider's weak affidavit of merit in no-fault insurance case.
Apr 27, 2020
A copy of a peer report is all that is needed
New York court clarifies that peer review reports need only be copies when requested by providers, and cannot be used as evidence to prove lack of medical necessity at trial.
Apr 1, 2013
I was wrong about the necessity of annexing the reports that the peer doctor relied upon
Analysis of Active Imaging v Progressive case where Appellate Term rejected challenge to medical necessity motion based on peer report without underlying medical records.
Oct 28, 2010
A minus v. Mercury
New York appellate court inconsistencies in no-fault insurance cases affecting venue selection and case outcomes for Long Island residents.
May 2, 2009
Objective evidence necessary
Court rules subjective patient complaints without objective medical evidence insufficient to deny acupuncture treatment necessity in no-fault insurance case.
Jul 21, 2015Common Questions
Frequently Asked Questions
What is a medical necessity denial in no-fault insurance?
A medical necessity denial occurs when the insurer's peer reviewer determines that treatment was not medically necessary based on a review of the patient's medical records. The peer reviewer writes a report explaining why the treatment does not meet the standard of medical necessity. To challenge this denial, the provider or claimant must present medical evidence — typically an affirmation from the treating physician — explaining why the treatment was necessary and rebutting the peer review findings.
How do you challenge a peer review denial?
To overcome a peer review denial, you typically need an affirmation or affidavit from the treating physician that specifically addresses and rebuts the peer reviewer's findings. The treating physician must explain the medical rationale for the treatment, reference the patient's clinical findings, and demonstrate why the peer reviewer's conclusions were incorrect. Generic or conclusory statements are insufficient — the response must be detailed and fact-specific.
What criteria determine medical necessity for no-fault treatment in New York?
Medical necessity is evaluated based on whether the treatment is appropriate for the patient's diagnosed condition, consistent with accepted medical standards, and not primarily for the convenience of the patient or provider. Peer reviewers assess factors including clinical findings, diagnostic test results, treatment plan consistency with the diagnosis, and whether the patient is showing functional improvement. Treatment that is excessive, experimental, or unsupported by objective findings may be deemed not medically necessary.
Can an insurer cut off no-fault benefits based on one IME?
Yes, an insurer can discontinue benefits after a single IME doctor concludes that further treatment is not medically necessary or that the claimant has reached maximum medical improvement. However, the IME report must be sufficiently detailed and the denial must be issued within 30 days under 11 NYCRR §65-3.8(c). The treating physician can submit a rebuttal affirmation explaining why continued treatment is necessary, forming the basis for challenging the cut-off at arbitration.
What is a peer review in no-fault insurance?
A peer review is a paper-based evaluation where a licensed medical professional reviews the patient's records and renders an opinion on whether the billed treatment was medically necessary. Unlike an IME, the peer reviewer does not examine the patient. The peer review report must be detailed, address the specific treatment at issue, and explain the medical rationale for the opinion. Generic or boilerplate peer reviews that fail to address the patient's individual clinical presentation may be found insufficient.
Was this article helpful?
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 medical necessity 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.
