Your past accidents will probably come up. Insurers share claim information through industry databases, so the adjuster on your new claim will often know about a 2019 rear-end collision before your first phone call. If a lawsuit is filed, the defense will ask about prior accidents, injuries and claims in written discovery and in your deposition. Prior accidents do not bar a claim, and a prior injury to a different body part rarely matters. A prior injury to the same body part is the defense’s main argument, and the case is won or lost on the medical records that show what the new crash changed.
What decides these cases is the comparison between before and after. A client who had neck pain from a 2019 crash, finished physical therapy in 2020, and had no treatment for four years before being hit on the 118 has a strong case for the new injury: the records show a gap and then a return of symptoms. A client who was in the middle of treatment for a lumbar injury when the second crash happened has a harder case, because the defense will argue the second crash added nothing. California law allows recovery for aggravation of a pre-existing condition, so the second client still has a claim, but it is measured by the difference the new crash made, and that requires a doctor willing to say what the difference was.
Do prior accidents affect my personal injury claim?
They can, but they do not defeat it. The defense uses prior accidents to argue that your current symptoms come from an old injury, or that you are a frequent claimant. California law allows full recovery for a new injury and for the aggravation of a pre-existing one. The answer to a prior-injury argument is the medical record: what your condition was before the new crash, what changed after, and a treating doctor’s opinion tying the change to the new event. Hiding a prior accident is the only way to turn it into a serious problem.
How the insurer finds out
Insurers report claims to shared databases that track bodily injury claims by name and date of birth. The adjuster pulls that index at the start. They also obtain your medical records with your authorization or through subpoena, and a record from an orthopedist in 2019 noting “MVA, cervical strain” is in the file. In a lawsuit, the standard form interrogatories ask directly about prior injuries, claims and lawsuits in the past ten years, and the deposition covers it in detail.
Assume the defense knows. The only question is whether your answers match what they know. A prior claim disclosed up front, with records, is a fact the case absorbs. A prior claim discovered by the defense after a deposition denial is a credibility problem that can cost more than the prior injury ever would have.
The pre-existing condition rule
California’s jury instructions tell jurors that a defendant who causes an injury is responsible for the harm caused even if the plaintiff was more susceptible to injury than an ordinary person, and that a defendant who aggravates a pre-existing condition is responsible for the aggravation, though not for the condition as it was before. This is the “eggshell plaintiff” rule, and it cuts in the injured person’s favor. A 58 year old with degenerative discs who is rear-ended on Topanga Canyon and now needs an epidural injection is entitled to recover for the injection and the pain, even though a 25 year old might have walked away.
The practical difficulty is proof. The defense’s doctor will read the old MRI, note the same degenerative findings, and say nothing changed. Your treating doctor has to be able to point to something specific: a new disc protrusion, a new symptom, a documented change in function, a return of pain after a long symptom-free period.
What the defense will argue
Three arguments appear in nearly every prior-accident case. First, that the current injury is the old one, unresolved. Second, that your treatment after the new crash was for the old condition. Third, that you are a serial claimant, usually said with less subtlety. The third argument is not admissible in the form the defense would like; prior claims cannot be used to argue you are the kind of person who makes claims. They can be used to attack your credibility if your account of the prior injury differs from the records.
The first two arguments are factual and are answered with records and a doctor’s opinion. If your prior case settled, the settlement itself is usually not admissible, though the injury is.
What to do now
Tell your attorney about every prior accident, injury, claim and workers’ compensation case, including ones you think are irrelevant. The attorney will get the old records before the defense does and will know what they say. Tell your treating doctors about prior injuries to the same body part; a chart that says “no prior neck problems” when the defense has a 2019 MRI is the problem to avoid. Then be specific in your own account about what is different now: a symptom you did not have, an activity you could do before and cannot now, a change in frequency or intensity.
Common mistakes
Denying a prior accident in a deposition or interrogatory. Telling the new doctor you were never hurt before. Assuming a prior injury to the same body part means the new case has no value. Not getting the old records early. Settling a prior case while a new injury is developing without telling either attorney. And letting the adjuster’s reference to your “claims history” set the number.
Questions people ask next
What if my prior accident was to a different body part? It is largely irrelevant. A knee injury in 2020 has nothing to say about a shoulder injury in 2026, and the defense gets little from it.
Will my prior settlement amount come out? Usually not. The fact of the prior injury and treatment is discoverable; the settlement amount generally is not admissible.
What if I was still treating for the old injury when the new crash happened? You can still recover for what the new crash added. The case needs a doctor to describe the aggravation, and it should be set up that way from the first visit after the new crash.
Manoukian Law Firm handles personal injury cases throughout Los Angeles County, and the attorney, Vaheh Manoukian, works each case personally, including getting the old records first and building the before-and-after comparison. If you have had prior accidents and were hurt again, call (818) 818-5031 for a free consultation.
