You were stopped at a light on Capitol Expressway in San Jose when a car hit you from behind. Your lower back was sore that night, and within a week pain was shooting down your leg. An MRI showed a herniated disc at L5-S1. When you sent the records to the other driver's insurer, the adjuster came back with a low offer and a single line: "The MRI shows degenerative changes consistent with age."
That response is so common in disc cases that it is almost a script. Here is how the claim actually works.
Quick answer: A herniated disc caused or worsened by a crash is compensable in California, even if your spine already had age-related degeneration. California's civil jury instructions allow recovery for aggravation of a preexisting condition (CACI 3927) and tell jurors to compensate a plaintiff who was unusually susceptible to injury for the full harm the defendant caused (CACI 3928). Value depends on the treatment path, from therapy to injections to surgery, the effect on work and daily life, and how clearly the medical records connect symptoms to the crash.
Key Takeaways
- A herniated disc happens when the soft center of a spinal disc pushes through its outer layer and can press on nerves.
- Degeneration on an MRI does not defeat a claim. California allows recovery for aggravating a preexisting condition.
- The timeline of symptoms and treatment is usually the most important evidence.
- Claim value rises with the intensity of treatment, especially injections and surgery, and with lost work.
- A treating doctor's opinion on causation often carries more weight than a records review by the insurer's expert.
What Is a Herniated Disc, and Can a Car Accident Cause One?
Spinal discs sit between the vertebrae and act as cushions. Each has a tougher outer ring and a softer center. When the outer ring tears and the center pushes out, the disc is herniated, sometimes called bulging, ruptured, or slipped, although doctors use those words with different meanings. If the disc presses on a nerve root, the result can be radiating pain, numbness, or weakness in an arm or leg.
The sudden loading of the spine in a collision, including rear-end impacts at moderate speeds, can cause a herniation or turn a quiet disc bulge that never caused symptoms into a painful one. Whether that happened in your case is a medical question your treating doctors should address directly.
Why Do Insurers Say the Injury Was Already There?
Most adults show some disc degeneration on imaging, even without symptoms. Insurers use that fact to argue the crash did not cause anything new. Our post on what insurance companies look for in your medical records explains how adjusters search for prior complaints and gaps.
California law answers the argument in two ways. First, a defendant who aggravates a preexisting condition is responsible for the aggravation. Second, a defendant takes the plaintiff as they find them. A person with a weaker spine who suffers more harm from the same impact can recover for all of the harm the crash caused. That principle is explained in our post on the eggshell plaintiff rule in California.
The practical fight is usually about proof: did you have back or leg symptoms before the crash, and if so, how did they change after?
What Evidence Connects a Herniated Disc to the Crash?
- A clean prior history, or a clear record that prior symptoms were different or resolved.
- Prompt treatment. Emergency room, urgent care, or doctor visits within days of the crash.
- Consistent complaints. Records that show the same pain pattern from visit to visit.
- Imaging. An MRI, and when available, a comparison to any earlier imaging.
- Objective findings. Nerve testing or exam findings, such as reflex or strength changes, that match the level of the herniation.
- A causation opinion from the treating physician that explains why the crash caused or worsened the condition.
How Is a Herniated Disc Claim Valued?
There is no formula. Economic damages include past and future medical expenses and lost earnings. Non-economic damages compensate for pain, limitations, and the effect on daily life. In California, past medical damages are generally measured by the amounts actually paid or incurred, not the full billed amount, under Howell v. Hamilton Meats and Provisions, Inc. (2011) 52 Cal.4th 541.
Value usually tracks the treatment path:
- Conservative care. Physical therapy, chiropractic care, and medication.
- Interventional care. Epidural steroid injections or other procedures.
- Surgery. A microdiscectomy or fusion, and the future care that may follow.
A claim that needs future care should be supported by a doctor's opinion on what treatment is reasonably certain to be needed, and sometimes by a life care plan.
What Mistakes Hurt a Disc Claim?
- Waiting weeks to see a doctor.
- Stopping treatment early without a medical reason.
- Leaving out prior back problems when a doctor asks. Insurers will find them, and omissions damage credibility.
- Posting about workouts or physical activity on social media.
- Accepting an early offer before you know whether you need injections or surgery.
What Should San Jose Drivers Know About Local Claims?
Crashes on freeways like US-101, I-280, and I-880 are usually investigated by the CHP, and crashes on city streets by the San Jose Police Department. If a lawsuit becomes necessary, a case against a driver in Santa Clara County is ordinarily filed in the Superior Court of California, County of Santa Clara. Our San Jose accident guide collects local resources.
Frequently Asked Questions
Can I get compensation if I already had degenerative disc disease?
Yes. You can recover for the harm the crash caused, including the worsening of an existing condition. The defense can argue some symptoms would have happened anyway, which is why the medical record matters.
Do I need surgery to have a valuable claim?
No. Many disc claims resolve with conservative care or injections. Surgery tends to raise the value because it increases medical costs, recovery time, and future risk.
How long after an accident can a herniated disc show up?
Symptoms can appear right away or develop over days. Tell your doctor about the crash at the first visit and seek care as soon as symptoms start.
Will the insurance company send me to its own doctor?
If a lawsuit is filed, the defense can usually request a physical examination by its chosen doctor under the Civil Discovery Act. Before a lawsuit, you generally have no obligation to see the other driver's doctor.
How long do I have to file?
Generally two years from the injury under Code of Civil Procedure section 335.1.
Herniated Disc After a Crash? Geller Legal Can Help.
Disc injuries are where insurers push hardest on the degeneration argument. A well-documented claim built around your treating doctors puts that argument in context.
Geller Legal | Personal Injury Attorneys gathers the records, prior imaging, and medical opinions that connect your injury to the crash, and values the claim with future care in mind. Learn more about our California car accident practice.
We serve injured clients throughout California, with offices in Walnut Creek, Oakland, and Los Angeles. If you were diagnosed with a herniated disc after a crash, call us at 213-770-4870 for a free, confidential consultation with Attorney Michael Geller.