How Pre-Existing Conditions Affect Car Accident Injury Claims

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Car accidents are stressful enough on their own — but when you’re dealing with a pre-existing medical condition, things can quickly get complicated. Insurance companies often use your medical history as a reason to deny or reduce your compensation, even if the accident clearly made your condition worse.

But here’s the truth: having a pre-existing condition does not disqualify you from filing a claim — and in many cases, you’re entitled to compensation if your condition was aggravated by the crash.

In this article, we’ll break down everything you need to know about filing a car accident injury claim with a pre-existing condition. From understanding the legal framework to tackling insurance adjuster tactics, this guide will arm you with the tools to navigate your claim with confidence.

Understanding the Legal Framework

What Counts as a Pre-Existing Condition?

A pre-existing condition is any health issue or injury that existed before the car accident occurred. This includes chronic back pain, osteoarthritis, whiplash from a previous accident, herniated discs, degenerative spine conditions, or old fractures and joint injuries.

These conditions are part of your medical history, but if an accident worsens or aggravates them, you can still be compensated under personal injury law.

Legal Protection for Vulnerable Victims

Personal injury law recognizes a principle called the “eggshell plaintiff rule.” This means that defendants, or their insurance companies, must take the victim as they find them.

If a person is more vulnerable to injury due to a pre-existing condition, the at-fault party is still responsible for the aggravation of that condition.

How Pre-Existing Conditions Impact Your Car Accident Claim

Why Insurance Companies Focus on Your Medical History

Insurance companies will often review your medical records in great detail, looking for any prior injuries they can use to argue that your current pain or limitations were not caused by the accident.

Their goal is to minimize the payout or deny the claim entirely.

Example: Using Your Health Against You

For instance, you may have had mild osteoarthritis in your knee before the accident, but now you can’t walk without pain. The insurance company may argue that your arthritis is the reason for your symptoms, not the crash.

Conditions Most Likely to Be Challenged

Common conditions they scrutinize include degenerative disc disease, chronic whiplash, neck or shoulder injuries, soft tissue damage, and prior concussions or head injuries.

Even manageable conditions before the crash can be significantly worsened by the trauma of a car accident. That’s where proving aggravation becomes critical.

Proving the Accident Aggravated Your Condition

The Importance of Medical Documentation

To support your claim, you’ll need to show the difference between your condition before and after the accident.

This means providing pre-accident medical records showing stability or mild symptoms, post-accident records indicating worsened pain, new symptoms, or functional limitations, and doctor’s notes explicitly stating that the accident aggravated the pre-existing condition.

Imaging Evidence Helps Support Your Case

Imaging tests like MRIs, CT scans, and X-rays can also provide crucial evidence by comparing your condition before and after the crash.

These comparisons help draw a clear line between your former baseline and the current impact of the accident.

Always Be Transparent with Medical History

Always be honest about your medical history. If the insurer finds out you hid information, your credibility could be damaged, even if your claim is valid.

Watch for Biased Independent Medical Exams (IMEs)

Insurance companies may also request an Independent Medical Examination (IME) to assess your condition. These exams are conducted by doctors hired by the insurer, so they’re often biased.

If you’re required to attend one, consider having your own physician review the findings to counterbalance potential insurer bias.

Insurance Company Strategies — and How to Fight Back

Tactic 1: Claiming the Injury Was Unrelated

One common tactic insurers use is to claim the injury was unrelated. They might say, “Your back was already bad — the accident didn’t change that.”

This is especially common in cases involving degenerative conditions.

Tactic 2: Denial Due to “Non-Disclosure”

Another tactic is to deny the claim due to “non-disclosure.” If you failed to mention your old injuries when filing the claim, they might deny it altogether, even if the injury worsened.

They’ll label it an “undisclosed pre-existing condition.”

How to Fight These Tactics

To fight back, submit clear, chronological medical documentation. Have your doctor or specialist write a letter explaining the aggravation.

Work with a personal injury attorney who understands these tactics and can help you present a strong case.

Do’s and Don’ts When Filing Your Claim

What You Should Do

Disclose your full medical history early and clearly. Get treatment promptly and follow all medical advice. Document everything, including symptoms, treatments, and changes.

Consult a personal injury lawyer, especially if things get complicated.

What to Avoid

Don’t exaggerate or hide your prior conditions. Don’t delay medical care, as it weakens your case. And don’t accept the first settlement offer without legal advice.

Real-World Scenarios

When Whiplash Meets Cervical Degeneration

Imagine you already had mild cervical degeneration but were managing it well. After a rear-end collision, your neck stiffness turns into severe, chronic pain.

Imaging reveals increased disc bulging. This is a textbook example of an aggravated pre-existing condition.

Osteoarthritis and Increased Disability

Or consider someone with early-stage knee osteoarthritis who could walk and work normally. After being rear-ended, they’re now using a cane and have trouble standing.

The crash didn’t cause the arthritis — but it made it significantly worse.

Quick Guide: 5 Steps to Strengthen Your Claim

Gather all medical records before and after the crash. Ask your doctor to note changes in your condition clearly. Get updated imaging to show new damage or aggravation.

Keep a daily journal of your symptoms and limitations. Contact a personal injury lawyer to help you organize your claim.

Key Takeaways

You can file a car accident injury claim even if you had prior injuries. The key is to prove that the accident aggravated your pre-existing condition.

Always be transparent with your medical history and work with a lawyer if you’re unsure how to proceed. Insurance companies often use pre-existing conditions to try and reduce your compensation, but that doesn’t mean they’re right.

Frequently Asked Questions

Can I still file a personal injury claim if I had a pre-existing condition?
Yes, you absolutely can. Having a pre-existing condition does not prevent you from filing a car accident injury claim. In fact, the law allows you to seek compensation if the accident aggravated or worsened your prior condition. The key is to provide medical evidence showing that your condition was stable or manageable before the accident and that it became worse afterward.

Will the insurance company deny my claim because of my medical history? 

Insurance companies may try to deny your claim or reduce your settlement based on your pre-existing medical history. They often argue that your current symptoms are not related to the accident. However, if you can show that the accident directly aggravated your condition, you still have a strong case. Proper medical records and a detailed doctor’s evaluation can make all the difference.

What if I forgot to mention a previous injury when I first filed my claim?
Leaving out a past injury—intentionally or unintentionally—can complicate your claim. However, it doesn’t automatically mean your claim will be denied. If you disclose the information as soon as possible and work with an attorney, it may still be possible to recover compensation. Your credibility and transparency will be important factors in resolving the issue.

How do I prove that the accident made my condition worse?
To prove that your condition was aggravated by the accident, you’ll need documentation from before and after the incident. This includes medical records, imaging (like MRIs or X-rays), and physician notes. A written opinion from your treating doctor stating that the accident caused a significant worsening of your condition can be one of the strongest pieces of evidence.

Do I need to give the insurance company access to all of my medical records?
You should only provide records that are relevant to your current injury claim. Insurance adjusters may ask for broad access to your entire medical history, but this isn’t always necessary—and can sometimes be used against you. It’s best to consult with an attorney who can help determine which records are appropriate to release while protecting your privacy and the strength of your claim.

Contact The Epstein Law Firm, P.A., Today

If you’ve been in a car accident and your old injuries feel worse, don’t wait — you may be entitled to compensation.

Pre-existing conditions make the claims process more complex, but with the right legal guidance, you can build a strong case and protect your rights.

Contact The Epstein Law Firm, P.A., today to review your claim and get the compensation you deserve.