Getting into an accident is a difficult experience. When you’re also dealing with a previous injury or a chronic medical issue, it can feel even more complicated. You might worry that an insurance company will use your medical history to deny or reduce your claim.
However, having a prior injury does not automatically prevent you from receiving fair compensation. In fact, Washington law on pre-existing conditions has specific protections for people in your exact situation, ensuring that at-fault parties are held responsible for the new harm they cause.
The core principle is that if someone’s negligence makes your old condition worse, they are accountable for that worsening. You deserve to be compensated for the new pain, additional medical treatments, and the ways your life has been further impacted.
If an accident worsened a prior injury, a knowledgeable Seattle personal injury lawyer can protect your rights and pursue full compensation—contact us today for a free consultation.

So, what exactly counts as a pre-existing condition in the eyes of the law? It’s any medical issue, injury, or ailment you had before the accident in question. It doesn’t have to be a severe or debilitating condition.
Common examples include:
Having one of these conditions can make you more vulnerable to injury. A minor fender-bender on I-5 might just be a nuisance for one person, but for someone with a pre-existing back problem, it could lead to a serious flare-up and significant pain. This is where Washington law steps in to protect you.
The most important legal concept that protects your claim is known as the “eggshell plaintiff” rule. Imagine a person whose skull is as fragile as an eggshell. If you negligently tap them on the head and their skull shatters, you can’t argue that you shouldn’t be responsible because a “normal” person wouldn’t have been hurt so badly. The law says you are responsible for the actual damage you caused.
This principle is a cornerstone of Washington law for pre-existing conditions. The official Washington Pattern Jury Instructions guide courts on this issue, stating that the defendant is responsible for the harm done even if the injured person was more susceptible to injury than a person in average health.
The phrase lawyers often use is that an at-fault party must “take the plaintiff as they find them.” This means they are responsible for the consequences of their actions, regardless of your prior health status.
This legal doctrine has a few key implications for your case:
This rule ensures that the law protects everyone, not just those in perfect health. It holds negligent parties accountable for the real-world impact of their actions on an individual’s life.
While the law is on your side, the practical challenge is proving that the recent accident—and not just the natural progression of your old condition—is the cause of your increased pain and new limitations. Insurance companies will look closely at this connection and may try to argue that your current symptoms are unrelated to the accident.
To build a strong case, you must clearly show how the accident made your condition worse. This is known as proving “aggravation.” This requires careful documentation and a consistent approach from the moment you seek medical care.
Your medical records are the most powerful evidence in a personal injury claim involving a prior injury. From your first doctor’s visit after the accident, you need to create a clear record of how things have changed.
Here are some essential steps:
Consistent and thorough medical records create a timeline that clearly connects your new or worsened symptoms to the accident.
Sometimes, the best way to show a change is with objective evidence. Diagnostic imaging can be incredibly helpful in these situations.
This type of objective evidence is much harder for an insurance company to dispute than subjective complaints of pain alone.
When an insurance adjuster sees a pre-existing condition in your medical history, they often view it as an opportunity to reduce the value of your claim. Their job is to protect their company’s bottom line, and they have common strategies for dealing with these types of cases. It’s important to be aware of them so you can be prepared.
They might try to:
Facing these tactics can be discouraging, but remember that the law provides a path to hold the at-fault party accountable. Having a legal advocate who understands these strategies can help level the playing field.

Under the Revised Code of Washington, at-fault parties are responsible for the damages they cause. When a pre-existing condition is involved, your compensation is focused on the worsening or aggravation of that condition.
You may be able to recover damages for:
It is essential to distinguish between the life you had with your managed condition before the accident and the life you have now. The compensation is meant to cover that difference.
Calculating pain and suffering is never simple, and it becomes even more nuanced with a pre-existing condition. The key is to demonstrate the change in your quality of life. For example, perhaps your old knee injury allowed you to enjoy walks around Green Lake, but after being rear-ended, you can no longer walk that distance without severe pain.
Your personal story, backed by testimony from family, friends, and medical providers, helps paint a picture of how the accident has impacted your daily existence. This difference in your ability to enjoy life and function day-to-day is the basis for your pain and suffering damages.
Here are answers to some common questions about how prior injuries can affect a personal injury claim.
You should always be truthful about your medical history when dealing with doctors and legal professionals. However, you are not obligated to give a recorded statement or provide unlimited access to your entire medical history to the other party’s insurance adjuster right away. It is often wise to consult with an attorney before releasing sensitive health information to ensure you only provide what is relevant to the accident.
Yes, an insurance company will likely request and review your past medical records to look for evidence of your pre-existing condition. They will use these records to argue that your current pain is not new. However, a knowledgeable attorney can use the same records to show a clear difference in your symptoms, treatment frequency, and functional abilities before and after the accident.
This is a very common situation. Many people have underlying conditions like degenerative disc disease that cause no pain or limitations until a traumatic event, like a car crash, “lights them up” and makes them symptomatic. In these cases, the at-fault party is responsible for the full extent of the new symptoms and the required treatment, as the condition was not affecting your life before their negligence.
The eggshell plaintiff rule applies to psychological conditions just as it does to physical ones. If an accident causes you to experience increased anxiety, depression, or PTSD, or if it aggravates a previously managed mental health condition, you may be entitled to compensation for your emotional distress and the cost of therapy or other mental health treatment.
Cases involving pre-existing conditions can be more complex, which sometimes means they may take longer to resolve. It requires more time to gather extensive medical records and potentially involve medical experts to build a strong case proving aggravation. This thorough preparation is often necessary to secure a fair settlement that fully accounts for your new level of harm.
If you were on disability, it can add a layer of complexity, but it doesn’t bar a claim. The focus will be on proving how the new accident has caused further limitations beyond those for which you were already receiving benefits. For example, perhaps you were able to perform some household chores before, but now you require assistance due to the worsened condition.
Dealing with a new injury on top of a pre-existing condition can feel frustrating and confusing. You may be in more pain than ever before, and the thought of fighting an insurance company is daunting. At Boohoff Law, P.A., we understand the challenges you face, and we are here to help you get through this. Our compassionate and skilled team has decades of combined experience advocating for clients just like you.
We will focus on your case so you can focus on your recovery. We will gather the evidence, consult with medical professionals, and aggressively negotiate to get you the compensation you deserve for the harm you have suffered. We are ready to take your case to trial if that’s what it takes to achieve a just outcome.
Contact us 24/7 at (877) 999-9999 or through our online form for a free, no-obligation consultation to understand the true value of your claim. We can meet you at home or in the hospital if you can’t come to us, and we are fluent in both English and Spanish. Remember our promise: No fees unless we win.
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