This comes up in almost every serious injury case I handle. A client comes in, they’ve been hurt in an accident, and somewhere in the conversation they mention they had a prior back injury, or a previous knee surgery, or some ongoing condition they’d been managing for years. And then they ask the question I always expect.
Does that mean I don’t have a case?
No. It doesn’t. But it does mean we need to handle things carefully.
The Eggshell Plaintiff Rule
Oklahoma, like every other state, recognizes what lawyers call the eggshell plaintiff doctrine. The idea is straightforward. You take the victim as you find them. If someone was already vulnerable because of a prior condition, and your negligence made that condition significantly worse, you’re responsible for the harm you caused. You don’t get a discount because the person you hurt wasn’t starting from perfect health.
So if you had a degenerative disc condition that was manageable before a car accident, and the accident turned it into something requiring surgery and permanent limitations, the at-fault driver is responsible for that outcome. Not for the underlying condition. But for what they did to it.
What the Insurance Company Will Do With It
Here’s where things get complicated, and I want to be direct about this.
Insurers will use your medical history aggressively. The moment they find a prior injury or condition related to the area of your body that was affected in the accident, they’ll argue that your current symptoms are just the pre-existing condition, not the accident. They’ll say you were already injured. They’ll say the accident didn’t cause anything new, it just aggravated something that was already there, and that aggravation is minimal.
That argument gets raised constantly. And without solid medical documentation distinguishing your pre-accident baseline from your post-accident condition, it can be effective.
Documentation Is Everything
The most important thing in a pre-existing condition case is establishing clearly what changed because of the accident. That requires a few things.
Your prior medical records actually help here, even though it might seem counterintuitive. They establish your baseline. What your condition was before the accident, how you were functioning, what treatment you were or weren’t receiving. That baseline is what you compare against your post-accident condition to show what the negligent party actually caused.
Your treating physician’s documentation matters enormously. A doctor who clearly notes the functional decline following the accident, who distinguishes between the underlying condition and the acute injury, and who connects your current limitations to the traumatic event rather than the pre-existing condition is providing the kind of evidence that holds up against an insurer’s aggravation argument.
Consistency in treatment is critical too. Gaps in medical care after an accident give insurers room to argue your injuries weren’t that serious. If they were serious enough to require treatment, treat them consistently and document everything.
The Aggravation Argument Cuts Both Ways
Something worth understanding: even if your only claim is aggravation of a pre-existing condition, that’s still a legitimate and often significant damages claim. An accident that takes a manageable chronic condition and turns it into something debilitating, that requires surgery, that ends a career, that fundamentally changes how someone can live their life, that’s real harm. Oklahoma law allows you to pursue compensation for that harm.
Under Oklahoma Statute Title 23, Section 61, injured parties are entitled to recover damages that fairly compensate them for the harm caused by the defendant’s negligence. Aggravation of a pre-existing condition is harm caused by the defendant’s negligence. Full stop.
The question is always how much the accident made things worse, not whether it made them worse at all.
What This Means for Your Case
If you have a pre-existing condition and you’ve been hurt in an accident, don’t assume it disqualifies you. It complicates things, yes. It means we need to be thorough about documentation and proactive about establishing your baseline. But complicated isn’t the same as impossible.
What it does mean is that you need someone who understands how these cases work and how to counter the arguments insurers will make about your medical history before those arguments gain traction.
Polchinski & Smith Personal Injury Lawyers works with injury victims throughout the Bethany area, including those with complex medical histories. If you’ve been hurt and you’re worried that a prior condition might affect your claim, talking with a Bethany personal injury lawyer is the right place to start.
