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Key Takeaways
- A back problem you had before the crash does not bar your claim. California juries must award damages for any condition the crash made worse (CACI 3927).
- The at-fault driver takes you as they find you. If your back was more fragile than most, they still pay for the full harm they caused (CACI 3928).
- “Degenerative” on an MRI is not proof of an old injury. Disc degeneration shows up in 37% of 20-year-olds with no back pain at all.
- What wins these cases is a before-and-after comparison: what you could do, and what your records show, before the crash and after it.
- Gaps in treatment and missed appointments are the insurer’s favorite argument. Follow your doctor’s plan, and write down why if you can’t.
- You generally have two years to sue (Code Civ. Proc. § 335.1), but only six months to file a claim if a government vehicle or road was involved (Gov. Code § 911.2).
Yes, you can recover for a back injury after a car accident in California even if you had back trouble, arthritis or “degenerative disc disease” before the crash. The at-fault driver does not owe you for the condition you already had, but must pay for everything the crash added: new pain, a disc that herniated, a condition that went from quiet to disabling, and the treatment, lost work and limits on your life that follow.
That is the legal rule. The practical fight is proof, because back injuries are among the hardest to document. A 2015 review of 33 imaging studies, covering 3,110 adults who had no back pain, found disc degeneration in 37% of 20-year-olds, and more often with age (Brinjikji et al., American Journal of Neuroradiology). Wear on a scan is common even in young people with no pain. Insurers know that and use it.
Why a back injury is the hardest car accident injury to prove
A broken arm shows up on an X-ray the same day. A back injury usually does not, for four reasons:
- Symptoms can be delayed. Many people feel stiff the night of the crash and only realize days later that the pain is spreading into a leg or not going away.
- Soft tissue damage is often invisible on imaging. Strained muscles and sprained ligaments rarely show on an X-ray.
- Scans show age as well as injury. An MRI after the crash will often show wear that was already there, and the report may use the word “degenerative” whether or not the crash changed anything.
- Most people have some back history. An old chiropractor visit or a note in a physical becomes a reason to say the problem is old.
The common back injuries from a crash include muscle strains and ligament sprains, herniated or bulging discs, facet joint injuries, compression fractures of the vertebrae, and nerve root irritation that sends pain, numbness or tingling down an arm or leg. Our San Diego back and spine injury page covers the full range, including spinal cord injuries.
“Degenerative” on your MRI does not end your claim
When an adjuster sees “degenerative disc disease” or “spondylosis” in the radiology report, the usual position is that the crash caused nothing and you are simply getting older. The research says that reasoning proves too little. The findings it points to are common in people who feel fine.
The question is not whether your spine shows wear. It is whether you had symptoms and limits before the crash, and whether they changed after it. A 45-year-old with a disc bulge on an MRI who never missed a day of work, never saw a doctor for back pain and played soccer every weekend has a strong argument that the crash, not the bulge, is why they can no longer do those things.
A radiologist can compare any spine MRI from before the crash with the new one. A herniation that was not there before is direct evidence of change.
What California law says about a pre-existing back condition
Two jury instructions, both published by the Judicial Council of California in its Civil Jury Instructions (CACI), set the rules a jury follows.
Aggravation: you recover for what got worse
CACI 3927 tells the jury that you are not entitled to damages for a condition you had before the crash. “However,” it continues, if the condition “was made worse” by the defendant’s wrongful conduct, the jury “must award damages that will reasonably and fairly compensate” you “for the effect on that condition.” The word is must, not may.
The eggshell plaintiff rule: they take you as they find you
CACI 3928 goes further. The jury must decide the full amount that fairly compensates you for all damages caused by the wrongful conduct, “even if” you were “more susceptible to injury than a normally healthy person would have been,” and even if a healthy person would not have been hurt at all. California courts have stated the principle for decades: a person who causes an injury “takes the person he injures as he finds him.” The general damages statute points the same way. Civil Code section 3333 allows compensation for all detriment the wrongful act proximately caused, “whether it could have been anticipated or not.”
So a driver cannot argue that someone with a healthier spine would have walked away. The driver pays for the harm this crash did to this person.
| Before the crash | After the crash | What the claim can include |
|---|---|---|
| Wear on imaging, no symptoms, no treatment | Pain, radiating symptoms, treatment | Generally the full injury; the wear was never a problem |
| Occasional back pain, managed without regular care | Constant pain, injections or surgery | The increase: the new treatment, lost work and lost activities |
| Active treatment for the same area | Clearly worse: new findings, new limits | The worsening, measured against the documented baseline |
| Active treatment for the same area | No measurable change | Little or nothing for the back; other injuries still count |
| A condition that was likely to worsen anyway | Worsened sooner because of the crash | The acceleration; how much is a question for medical experts |
How to prove the crash made it worse
Aggravation cases are won on a clear before-and-after picture. The evidence that builds it:
- Your prior records, honestly disclosed. The insurer will get them anyway. Records that show a quiet period, such as no back visits for three years, are often your best evidence.
- Prompt medical care after the crash, with every symptom reported, including the ones that seem minor, and a clear history of when each started.
- A treating doctor’s opinion on cause. The strongest causation evidence often comes from a physician who explains, in the chart, why the new findings and symptoms are consistent with the crash.
- New imaging compared with old imaging, where any exists.
- Proof of your life before. Work attendance, gym or league records, photos, and people who can describe what you did before and what you can’t do now.
- The crash itself. Photos of the vehicles, the police report and repair estimates help answer a “low-impact crash” argument.
If you were partly at fault for the crash, that reduces your recovery but does not end it. Our post on how comparative fault works in California car accident cases explains the math.
The insurer’s usual defenses, and how they are answered
“There was a gap in treatment.” Under CACI 3930, you cannot recover for harm the defense proves you could have avoided with reasonable effort, and insurers argue that a gap means you healed or didn’t care. The jury judges your choices by what was reasonable for you at the time, including whether you could make the effort or expense without undue risk or hardship. If you stopped therapy because you couldn’t get time off or your insurance ran out, write that down when it happens.
“It was a minor crash.” Bumper damage is not a medical measurement. Your doctor, not a repair estimate, explains the injury.
The defense medical exam. If you file a lawsuit, Code of Civil Procedure section 2032.220 lets the defendant demand one physical examination by a doctor it chooses, within 75 miles of your home and without painful or intrusive tests. Section 2032.510 lets your attorney or the attorney’s representative attend and audio-record what is said. That doctor works for the defense.
The recorded statement. The other driver’s insurer will often ask for one. You are not required to give it, and a casual “my back has always been a little sore” can follow you for the whole claim.
Other California rules that affect a back injury claim
- Insurance limits. For policies issued or renewed since January 1, 2025, California’s minimum bodily injury liability coverage is $30,000 per person and $60,000 per accident (Veh. Code § 16056). A back injury needing surgery can exceed that. Your own uninsured and underinsured motorist coverage is required on California policies unless you waived it in writing (Ins. Code § 11580.2), so check your declarations page.
- If you were driving uninsured. Civil Code section 3333.4 bars an uninsured owner or driver from recovering pain and suffering for a car crash, with narrow exceptions. Medical bills and lost wages remain recoverable.
- Deadlines. Two years to file a lawsuit for personal injury (Code Civ. Proc. § 335.1); six months to present a claim if a city, county or state vehicle, employee or road defect was involved (Gov. Code § 911.2).
If you were hurt while driving for work, the back injury is also a workers’ compensation claim, and a claim against the other driver can run alongside it. Rideshare passengers face their own insurance layers; see our guide to Uber and Lyft accidents.
What to do this week
- See a doctor if you haven’t, and describe every symptom, including numbness, tingling, weakness or pain that travels into a leg or arm. Loss of bladder or bowel control, or new leg weakness, needs care right away.
- Tell the doctor about your back history plainly, and describe how this pain is different.
- Start a short daily log: pain level, what you couldn’t do, missed work, and any appointment you had to skip and why.
- Gather proof of before: a list of past providers, any old imaging, and the names of people who know what your normal days looked like.
- Keep the crash evidence: photos, the police report number, the other driver’s insurance, and repair estimates.
- Don’t give a recorded statement or sign a medical release for the other driver’s insurer until you understand what it covers.
For broader steps, see our San Diego car accident page, our explainer on what qualifies as a personal injury, and our post on whiplash injuries.
Frequently asked questions
Talk to a San Diego back injury attorney
Banker’s Hill Law Firm has represented injured people across San Diego County since 1991. Maxwell Agha and our team handle car accident claims where the insurer blames an old back problem, in English or Spanish, and we work with your doctors to show what the crash changed.
We work on a contingency fee basis, which means you pay no attorney fees unless we recover compensation for you. There are no upfront costs and no out-of-pocket fees.
If you hurt your back in a crash, call (619) 230-0330 or contact our San Diego office. We also serve Chula Vista and the South Bay.
This article is general information about California law and is not legal or medical advice. Reading it does not create an attorney-client relationship. How a pre-existing condition affects your claim depends on your medical history and the facts of the crash, so speak with an attorney and your doctor about your situation.
