The insurance adjuster’s questions started friendly enough, but then the conversation shifted. "Have you ever had back pain before this accident? Have you ever seen a chiropractor? Have you ever been treated for headaches?" With each question, your heart sinks a little.
You are an active person; you have had aches and pains before. Now you worry that your honest answers will be used to deny the very real, very different pain you are feeling today. This is a deliberate strategy. Insurance companies want you to believe that your medical history makes your current injury worthless.
The law, however, says something very different. The truth is that how pre-existing injuries affect your case is not about erasing your claim; it is about clearly and honestly proving how the recent trauma made things worse.
What to know about your medical history:
- A pre-existing condition does not prevent you from filing a personal injury claim. The law recognizes that a negligent party is responsible for the full extent of the harm they cause, including the aggravation of a prior injury.
- Insurance companies will use your medical history as their primary tool to devalue your claim. Their goal is to argue your current pain is from your old condition, not the recent accident.
- A successful claim depends on clear medical evidence that distinguishes your prior condition from the new or worsened symptoms you are experiencing now.
- Complete honesty with your doctors and your legal team about your medical history is not a weakness; it is the foundation of a strong and credible case.
The Insurance Company's Playbook: Using Your Past Against You
From the moment you file a claim, the insurance adjuster begins an investigation. Their primary goal is not to assess your current well-being, but to find information that reduces their company's financial exposure. Your past medical history is the first place they will look.
The broad medical authorization
The adjuster will send you a form called “Authorization for Release of Medical Records." The form they send is almost always intentionally broad. It gives them the right to access your entire medical history, from childhood to the present day. They are not just looking for records related to your current injury.
They are on a fishing expedition. They search for any note in a doctor's file, from any point in your life, that mentions a similar complaint. Signing this document without legal review gives the opposing side a roadmap to your entire medical past, which they will use to build a case against you.
The "It's the same old pain" argument
Once they find a record of a prior injury, a back strain from five years ago or a minor sports injury from a decade ago, they will build their defense around it. Their argument will be simple: the pain you feel now is not from the recent car crash or fall.
It is just a flare-up of your old problem. They will use this argument to justify a lowball settlement offer or an outright denial of your claim, hoping you will get discouraged and give up.
The "Eggshell plaintiff" rule
Minnesota and Wisconsin law provides powerful protection for injured people with pre-existing conditions. This legal principle is often called the "eggshell plaintiff" rule. It is a simple but profound concept: a negligent party must take their victim as they find them.
Imagine a person taps two objects with the same amount of force. One is a sturdy coffee mug, and the other is a delicate eggshell. The mug is fine, but the eggshell shatters. The person who did the tapping is not responsible for just a "normal" amount of damage; they are responsible for shattering the eggshell.
The same principle applies to your injury. If you had a pre-existing back condition that made you more susceptible to injury, the at-fault driver does not get a discount on the harm they caused. That driver is responsible for the full extent of the damage, even if a healthier person might not have been hurt as badly.
The U.S. Centers for Disease Control and Prevention (CDC) provides extensive information on traumatic injuries, showing how any level of force can have a wide range of effects on different people.
Proving aggravation of a pre-existing injury
In most of these cases, the legal focus is on proving "aggravation." This means showing that the recent accident took a stable, manageable, or even dormant pre-existing condition and made it significantly worse.
An aggravation of a prior injury is a new, distinct harm. Your medical records and testimony can show this worsening in several ways.
- Increased pain: The pain is now more frequent, more intense, or located in a slightly different area than before the accident.
- New symptoms: You are now experiencing new types of symptoms, such as radiating pain, numbness, or weakness, that you did not have before.
- Greater limitations: Your old condition may have been a minor annoyance, but now you are unable to work, perform daily tasks, or enjoy your hobbies.
- Need for more treatment: Before the accident, your condition required no treatment, but now you need physical therapy, injections, or even surgery.
Proving this "before and after" picture overcomes the insurance company's defense and secures fair compensation. The claim is not for the old injury; it is for the new level of harm and suffering the at-fault party's negligence caused.
The Power of Clear and Honest Medical Evidence
Your medical records and your doctor’s opinion are the most powerful tools you have to prove your case. A successful outcome depends on creating a clear, medically supported narrative that separates your old injury from the new harm.
Full disclosure with your doctor
You must be completely honest with your treating physician from your very first visit after the accident. Inform them about your pre-existing condition and be specific about how your current symptoms differ.
This honesty does two things. First, your doctor can provide you with the best possible medical care. Second, it builds credibility. A medical record that acknowledges a prior condition and then clearly details the new symptoms is far more persuasive than a record that seems to hide the past. An insurance company will have a very difficult time arguing you are dishonest when you have been upfront from the beginning.
Distinguishing old from new with medical proof
Your doctor's medical opinion is a central piece of evidence. A report from your doctor that clearly states, "in my medical opinion, the recent car accident is the direct cause of the patient's herniated disc and the significant worsening of their underlying degenerative condition" is incredibly powerful.
Your attorney works with your doctor to obtain a detailed report that explains the medical science behind your aggravated injury in clear terms. Diagnostic imaging can also help tell the story. An MRI taken after the accident might show a new injury, like a disc herniation, that an MRI from a few years ago did not show.
Comparing old and new medical records is a key part of the legal process.
Your legal team will work with your doctors to assemble the proof. This evidence creates a complete picture for the insurance company.
- A detailed report from your treating physician linking the new trauma to your worsened condition.
- Side-by-side comparisons of pre-accident and post-accident diagnostic films.
- Testimony from you and your family about how your life and limitations have changed since the accident.
- Records from physical therapists that document your new functional deficits.
This wall of evidence makes it very difficult for an insurance company to argue that nothing has changed.
Don’t Trust an Algorithm with Your Minnesota Injury Case
An artificial intelligence tool can give you general information, but it cannot analyze decades of your personal medical history or the nuances of the eggshell plaintiff rule in Minnesota. It cannot depose your doctor or cross-examine the insurance company's medical examiner.
Relying on an AI for legal guidance in a case with this level of medical complexity may cause you to make irreversible errors. Always consult with a qualified personal injury attorney about your situation.
Frequently Asked Questions About Pre-Existing Injuries
What if I was actively treating for the old injury when the new accident happened?
This makes the case more complex, but it does not bar your claim. The focus will be on proving how the new trauma made your treatment plan more difficult, prolonged your recovery, or caused a significant setback. For instance, you may have been improving with physical therapy, but the crash caused a new level of injury that now requires surgery.
Does the eggshell plaintiff rule apply to pre-existing mental health conditions?
Yes, absolutely. If you had a pre-existing but stable condition like anxiety or PTSD, and a traumatic accident causes a severe worsening of your symptoms, the at-fault party is responsible for that psychological harm. The same legal principle applies to both physical and emotional injuries.
Will the insurance company get access to all of my medical records?
Their initial request will be for everything. However, a personal injury attorney can fight to limit their access to only the records that are relevant to the body parts injured in the accident. This is a legal battle over the scope of discovery that protects your privacy from an overly broad fishing expedition.
What if I don't remember every single detail of my past medical care?
That is normal. The insurance company may try to portray a forgotten doctor's visit from years ago as an attempt to hide something. However, the legal process allows for an honest "I don't recall." The focus will be on the documented medical records, not on a perfect memory of every ache and pain you have ever had.
Building Your Strongest Case
Your medical history is a part of your story, but it is not the end of it. You have the right to hold a negligent party responsible for the new harm they have caused you. The attorneys at Tyroler Leonard Injury Law are here to help you build a strong, credible, and honest case.
We will manage the complex process of gathering medical evidence, fight back against the insurance company's unfair tactics, and show the true and full extent of your injuries. For a free, no-obligation consultation, please call us at (952) 567-2488.