The Degenerative Changes Defense in New York: How Insurers Blame Your Herniated Disc on Aging — and How to Prove the Crash Caused It

You're 47 years old, stopped in traffic on the Belt Parkway near Bay Ridge in Brooklyn, when an SUV slams into you from behind. Within days, pain shoots from your neck down your arm, and an MRI shows a herniated disc at C5-C6 pressing on a nerve root. Then the insurance company's letter arrives: their radiologist reviewed your films and concluded your injury is nothing more than "chronic degenerative disc disease consistent with the patient's age." In plain English, they're saying the crash didn't hurt you — your birthday did. This is the degenerative changes defense, and it's the single most common weapon insurers use against New York crash victims over 40. Here's how it works, and how the right medical evidence takes it apart.

What Is the Degenerative Changes Defense in New York Herniated Disc Cases?

The degenerative changes defense is the insurance industry's argument that the herniated disc on your MRI was caused by natural aging, not by the crash. The insurer hires a radiologist who never examines you and never speaks to you. That doctor looks at the same MRI films your own radiologist read and writes a report filled with words like "desiccation," "spondylosis," and "disc bulging" — all terms that describe wear and tear. The conclusion is always some version of the same sentence: these findings are longstanding and pre-existing, and no acute traumatic injury is identified.

The defense matters because of how New York's no-fault system works. Under Insurance Law § 5102(d), you can't sue for pain and suffering after a car accident unless you have a "serious injury" — the statute lists categories including a fracture, a permanent consequential limitation of use of a body organ or member, a significant limitation of use of a body function or system, and a 90/180-day impairment. If the insurer can convince a judge or jury that your disc herniation existed before the crash, then the crash didn't cause a serious injury, and your entire pain-and-suffering claim collapses. That's the whole game.

The degeneration report rarely travels alone. It usually arrives alongside a defense medical exam — the so-called independent medical examination — and sometimes a biomechanical expert claiming the impact was too minor to injure anyone. Together, these reports are designed to support a motion asking the court to throw your case out before trial.

Why Do Insurers Aim the Degeneration Argument at Crash Victims Over 40?

Insurers use the degeneration argument against older victims because nearly everyone over 40 has some degenerative findings on a spine MRI, which gives the defense radiologist raw material to work with. A widely cited systematic review published in the American Journal of Neuroradiology found disc degeneration in a substantial proportion of asymptomatic people of all ages. Read that carefully: those were people with no pain at all. Degeneration on an MRI is as common as gray hair. The defense takes that universal truth and twists it — because your films show some age-related change, they argue, your pain must come from age too.

The economics explain the rest. Your own no-fault carrier is on the hook for "basic economic loss" — medical bills and lost earnings capped at $50,000 per person under Insurance Law § 5102(a) — and it can cut off treatment payments based on a paper review that labels your care "unrelated to the accident." The at-fault driver's carrier faces far bigger exposure. A cervical herniation that progresses to fusion surgery can push a case into the six- and seven-figure range, as we covered in our review of recent New York spinal fusion verdicts and settlements. A degeneration report that knocks out causation is the cheapest tool the insurer has to avoid that number.

Rear-end crashes make this fight especially common. Rear-end collisions are among the most common crashes on American roads, and they produce exactly the flexion-extension forces that herniate cervical and lumbar discs. When the typical rear-end victim is a working adult in their 40s or 50s, the insurer knows the MRI will show something age-related to point at.

How Do Acute MRI Findings Prove Your Herniation Came From the Crash?

Objective imaging can carry trauma signatures that aging simply can't explain, and that's where the degenerative changes defense starts to fall apart. A herniated disc happens when the soft inner core of the disc pushes through a tear in its tougher outer ring, as the Cleveland Clinic explains. Trauma and aging both can cause that — but they tend to leave different fingerprints on the film.

When your radiologist and treating surgeon compare your MRI against the defense report, they're looking for a specific pattern:

• A focal herniation or extrusion at a single level — trauma tends to blow out one disc, while aging produces diffuse bulging across multiple levels

• An annular tear (often reported as a "high-intensity zone"), the bright signal showing the disc's outer ring was torn

• Edema — fluid and swelling in or around the disc and vertebrae, a hallmark of recent injury that fades over weeks, not years

• Nerve root compression that matches your symptoms — a C5-C6 herniation pressing the exact nerve that runs to the thumb and forearm where you feel numbness

• The absence of chronic markers at the injured level, like large bone spurs or longstanding endplate changes that take years to form

No single finding wins the argument by itself. It's the pattern that persuades: a spine with mild, quiet, age-appropriate change at every level except one — and at that one level, a fresh tear, swelling, and a fragment of disc pressing on the same nerve that lit up the week of the crash. That's a story a Brooklyn jury understands. It's also why getting an MRI promptly matters so much. Edema and acute signal changes are strongest in the first weeks after trauma, so an MRI taken within a month of the crash captures evidence that an MRI taken a year later can't.

How Do EMG Timing and Pre-Accident Records Rebut the Degeneration Defense?

An EMG can effectively time-stamp your nerve damage, and clean pre-accident records prove you weren't hurting before the impact — together, they're the counterattack that defeats the degeneration argument. An EMG, or electromyography, measures the electrical activity in your muscles, while nerve conduction studies measure how fast signals travel along your nerves; MedlinePlus has a plain-language explanation of both. What most people don't realize is that these tests distinguish new nerve damage from old nerve damage. Certain findings — fibrillations and positive sharp waves — typically appear roughly three weeks after a nerve is injured and signal acute, ongoing damage. Different findings show chronic changes where the body has been compensating for years.

So when your EMG at 90 days post-crash shows acute denervation in the muscles fed by the compressed nerve root, with no chronic changes, your neurologist can testify that the nerve injury is new — it happened around the time of the crash, not a decade ago. We explained how these studies anchor a spine case in our post on how EMG and nerve conduction studies lock in permanent radiculopathy. A degenerative process that supposedly took twenty years to develop can't explain electrical findings that only appear in the first months after an injury.

Pre-accident records do the rest of the work. If you saw your primary care doctor for ten years and never once complained about your neck, that silence is powerful evidence. If you have an old MRI from before the crash — taken for any reason — and it shows no herniation at the level that's now destroyed, the degeneration opinion is finished. Most claimants miss that the defense radiologist almost never knows whether pre-accident imaging or records exist when writing the report; experienced lawyers hold back a clean prior MRI or a decade of silent medical records until cross-examination, where the reveal can collapse the degeneration opinion in front of the jury.

New York law also tells you exactly what your doctors must do. In Pommells v. Perez, 4 N.Y.3d 566 (2005), the Court of Appeals held that when the defense comes forward with evidence of a pre-existing degenerative condition, your doctors can't ignore it — they must address the degeneration evidence and explain why the crash, not aging, caused your injury. A treating surgeon who reviews the actual films and walks through the acute findings satisfies that burden, and as we've written before, the doctor who actually treated you usually wins the credibility battle against a hired reviewer who spent twenty minutes with your file. One more deadline to know: under CPLR § 214, a personal injury lawsuit in New York must generally be filed within three years — but building this medical record starts on day one, not year three.

What Is the Eggshell Plaintiff Rule — and Why Does Aging Actually Help Your Case?

The eggshell plaintiff rule says the person who hurt you takes you exactly as they found you — a fragile spine is not a defense to breaking it. This is settled New York law, and it flips the entire degeneration argument on its head. Even if your discs showed age-related wear before the crash, the defendant is fully responsible if the crash aggravated that condition or turned a silent, painless condition into a painful, disabling one. New York juries are instructed on exactly this principle: activating or worsening a pre-existing condition is a compensable injury.

Think about what that means in practice. A 50-year-old disc that has lost some water content is more vulnerable to tearing than a 22-year-old's disc. A rear-end impact that a younger spine might shrug off can herniate an older one. The defense wants the jury to hear "degeneration" and think "not our fault." Your lawyer wants the jury to hear "degeneration" and think "that's why the crash hurt him so badly — and the law says you take your victim as you find him." In a courtroom at Kings County Supreme Court on Adams Street, jurors — most of whom are over 40 themselves and know their own MRIs wouldn't be perfect — tend to grasp this instantly.

The eggshell rule doesn't erase your burden of proof. You still need the acute MRI findings, the EMG timing, the pre-accident silence, and a treating physician who connects them, because you must still clear the serious injury threshold — a hurdle we broke down in our guide to New York's serious injury threshold and the 2026 reforms. But once that evidence is in place, your age stops being the insurer's weapon and becomes part of your damages story: an older spine, wrongfully injured, with fewer good years left and a harder road to recovery.

Frequently Asked Questions

Can I win my case if my MRI report mentions degenerative changes?

Yes. Nearly every adult over 40 has some degeneration on a spine MRI, including people with zero pain, so the words alone don't defeat your claim. What matters is whether the imaging, EMG results, and your medical history show that the crash caused an acute injury or aggravated a previously silent condition.

What if I actually had neck or back pain before the accident?

You can still recover, because aggravation of a pre-existing condition is a compensable injury under New York law. The key is complete honesty with your lawyer and your doctors — the defense will find your old records, and a documented "before and after" comparison showing the crash made things dramatically worse is often very persuasive.

How soon after a crash should I get an MRI and an EMG?

Get the MRI as soon as your doctor orders it, because acute findings like edema fade over weeks. EMG findings of acute nerve damage typically don't appear until about three weeks after injury, so neurologists often schedule the study in the one-to-three-month window — early enough to capture acute changes, late enough for them to show.

Does the degeneration argument show up at the no-fault stage too?

Yes. No-fault carriers use paper "peer reviews" that label your treatment as related to degeneration rather than the crash, then cut off payment for therapy, injections, or surgery. Don't stop treating — your attorney can challenge the denial, and continued documented treatment protects both your health and your case.

The Bottom Line

The degenerative changes defense counts on you being intimidated by radiology jargon and giving up. With prompt imaging, a well-timed EMG, clean pre-accident records, and a treating doctor who addresses causation head-on, it's a defense that gets beaten in New York courtrooms all the time.

Written by Reza Yassi | LinkedIn

If you or someone you know was seriously hurt in a crash and the insurance company is blaming your herniated disc on "degenerative changes," the team at Yassi Law P.C. is ready to help. Call us today at 646-992-2138 for a consultation.

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This article is for informational purposes only and does not constitute legal advice. Although I am an attorney, I am not your attorney, and reading this article does not create an attorney-client relationship. Laws vary by jurisdiction and may have changed since the publication of this article. For advice specific to your situation, consult a qualified attorney.