We’re going to be straight with you on this one, because a lot of websites will dance around the answer.
In most cases, no. Once you’ve settled a personal injury case in California, it’s done. The settlement agreement you signed almost certainly included a release of liability that closes the door on future claims — including injuries that get worse after the fact.
That’s a hard pill to swallow when you’re staring down a surgery you didn’t see coming or dealing with chronic pain that wasn’t part of the equation when you accepted the check. But understanding why this is the rule — and what narrow exceptions exist — can help you figure out what to do next.
When you settle a personal injury claim, you sign two things: the settlement agreement and a release of liability. That release typically covers “all known and unknown injuries” from the accident. You might have even signed a waiver of California Civil Code Section 1542, which would normally protect your right to claims you didn’t know existed at the time.
By waiving 1542, you essentially said: “I understand my condition might change, and I’m accepting this money anyway.”
California courts enforce these agreements. They’re treated as binding contracts. The whole system depends on finality — if insurance companies thought settled cases could be reopened every time someone’s condition changed, they’d never agree to settle anything. And the court system would collapse under the weight of cases being relitigated years later.
Is it fair? Not always. But it’s how it works.
There are a handful of situations where a court might allow a settled case to be reopened. But these are genuinely rare, and proving them requires serious evidence.
If the other side actively deceived you to get you to settle for less, a court may void the release. We’re not talking about them being tough negotiators. We’re talking about intentional, provable lies.
Examples:
This is a high bar. You’d essentially be filing a new lawsuit alleging fraud, and you may have to give back the settlement money to undo the deal.
If both sides were operating under a fundamental misunderstanding about your injuries when the settlement was reached, a court could potentially set it aside under Civil Code §1689(b)(1).
The classic example: both parties thought you had a minor concussion. But medical scans that existed at the time — but were never reviewed — actually showed a severe brain injury. Both sides got it wrong based on incomplete information.
The critical distinction: this only applies to facts that were wrong at the time of settlement. An injury that was minor at settlement but genuinely worsened afterward doesn’t qualify. The mistake has to be about what was already true — not what happened later.
If you were pressured into signing under extreme circumstances — threats, undue influence, or signing while you were mentally incapacitated — a court might throw out the agreement. This is very rare in practice.
If your case is still open and your condition is getting worse, you’re in a completely different — and much better — position. You haven’t signed anything away.
This is exactly why good lawyers tell you to wait.
The smartest move in any personal injury case is to hold off on settling until you’ve reached maximum medical improvement (MMI). That’s the point where your doctor says your condition has stabilized — you’ve recovered as much as you’re going to, or at least enough to predict what the future looks like.
Settling before MMI is gambling. You’re guessing at what your injuries will cost over the long run. And if you guess wrong, there’s no do-over.
Once you hit MMI, your attorney can accurately calculate:
Insurance companies push for fast settlements on purpose. They know the case gets more expensive for them the longer you wait. They want you to sign before you know the real number.
Don’t let them rush you. The two-year statute of limitations in California gives you time — use it wisely.
Different rules entirely. California workers’ compensation law allows injured workers to petition to reopen their case within five years of the date of injury if their condition worsens. This is far more generous than the rules for personal injury settlements.
If your injury happened on the job, talk to an attorney about your options — even if your workers’ comp case was already resolved.
If there’s one thing to take from this article, it’s this: the time to protect yourself is before you settle, not after.
A fair settlement accounts for every possible outcome — including the possibility that things get worse. That means:
Insurance companies are counting on your impatience. They’re counting on your bills and stress making you say yes too soon. Don’t give them that advantage.
Whether you’re still negotiating, considering a settlement offer, or dealing with a worsening condition after the fact — we can help you understand where you stand.
At DP Injury Attorneys, we don’t let our clients settle before they’re ready. We push back on lowball offers, we wait for the medical picture to clear, and we make sure the number on the table actually covers what our clients are going through.
If you’re facing a settlement decision or your injuries are getting worse, talk to us first.
Contact us for a free consultation. No fee unless we win.
Arthur Paul D’Egidio is the Managing Partner of DP Injury Attorneys, a San Diego personal injury law firm. With more than 12 years of experience in California injury law, he has dedicated his practice to representing clients in a wide range of personal injury matters, including car accidents, workers’ compensation, slip and falls, catastrophic injury, and wrongful death cases.
Arthur received his Juris Doctor from the Thomas Jefferson School of Law and is a member of the State Bar of California as well as the San Diego County Bar Association. He has received numerous accolades for his work, including being named a Super Lawyer for seven straight years by Thomson Reuters and a “Top 40 Under 40” by the National Trial Lawyers.
