Two years ago, a knee injury made climbing stairs uncomfortable, but manageable. Then a distracted driver ran a red light. After the crash, the pain became sharper, physical therapy resumed, and doctors began reconsidering surgery that had previously seemed like a distant possibility. When the insurance company learned about the earlier injury, a new concern emerged: does a preexisting condition mean there's no personal injury claim?
In many cases, the answer is no. A preexisting medical condition doesn't automatically prevent someone from pursuing compensation after an accident. If the collision aggravated, accelerated, or worsened an existing injury or illness, a personal injury claim may still be available.
The focus is often on what changed after the accident, how those changes are supported by medical evidence, and how the applicable state's laws apply to the claim. Let's break down what this means and why a prior diagnosis isn't necessarily the end of the road.
Key Takeaways: How Preexisting Conditions Affect Personal Injury Claims
- A preexisting injury or medical condition does not automatically prevent you from pursuing a personal injury claim.
- Compensation may be available when an accident causes a new injury or aggravates, accelerates, or makes an existing condition symptomatic.
- Damages generally focus on harm caused by the accident, rather than pain or disability that would have existed regardless of it.
- Medical records from before and after the accident can help establish changes in symptoms, treatment needs, and physical limitations.
- The eggshell-plaintiff rule may protect people whose underlying medical conditions make them unusually vulnerable to serious injury, although the exact rules vary by state.
Understanding Preexisting Conditions in Personal Injury Cases
A preexisting condition is an injury, illness, physical condition, or impairment that existed before the accident involved in a personal injury claim. Some conditions are long-term and well documented, while others may have caused only occasional symptoms or no noticeable problems before the incident.
Common examples include:
- arthritis
- degenerative disc disease
- previous neck or back injuries
- prior knee or shoulder injuries
- healed fractures
- chronic joint pain
- osteoporosis
- previous surgeries
Having one of these conditions does not automatically prevent someone from bringing a personal injury claim. The important question is whether the accident caused a new injury, aggravated an existing condition, or caused an underlying condition to become symptomatic.
Preexisting health conditions are also extremely common. According to the Centers for Disease Control and Prevention, about three in four American adults have at least one chronic condition, and more than half have two or more. As a result, many people injured in car crashes, slip and falls, or other accidents already have some type of underlying medical condition before the incident occurs.
How Do Preexisting Conditions Affect a Personal Injury Claim?
A prior medical condition can make a personal injury claim more complicated, but it does not automatically prevent someone from recovering compensation. The central question is usually what changed because of the accident.
An accident may cause an entirely new injury, worsen an existing condition, cause a previously stable or asymptomatic condition to become symptomatic, or accelerate the need for treatment that might otherwise have occurred later.
For example, someone with occasional neck stiffness from an old sports injury may begin experiencing constant pain, numbness, or reduced mobility after a rear-end collision. A person with mild arthritis may develop severe knee pain after a fall, with medical evidence showing that joint replacement is now likely to be needed sooner than it otherwise would have been. Someone who previously recovered from a shoulder injury may suffer new tissue damage in a car accident and require additional treatment or surgery.
Signs that an accident may have caused new harm or aggravated a preexisting condition can include:
- increased pain or reduced mobility
- new symptoms
- additional medical treatment
- new diagnostic findings
- newly recommended surgery or surgery needed sooner than anticipated
- a longer recovery period
- lasting changes in physical function
Whether these changes can be attributed to the accident often depends on the medical evidence. The exact standards for proving causation and recovering compensation vary by state.
The Eggshell Plaintiff Rule and Preexisting Conditions
Personal injury law generally recognizes that a negligent party must take an injured person as they find them. This principle is commonly known as the eggshell plaintiff or eggshell skull rule.
Under this rule, a person does not lose the right to compensation simply because an underlying condition made them more vulnerable to serious injury. For example, if someone with osteoporosis suffers unusually severe fractures in an accident because their bones were more susceptible to injury, the responsible party generally cannot avoid liability simply because a healthier person might have suffered less harm.
A related but somewhat different issue arises when someone was already experiencing symptoms or limitations before the accident. In that situation, the claim generally focuses on the additional harm caused by the accident, such as increased pain, new limitations, additional medical treatment, or an accelerated need for surgery, rather than symptoms or limitations that would have existed regardless of the accident.
The precise rules for evaluating preexisting conditions, aggravation, and accident-related damages vary by state and depend on the facts and medical evidence in each case.
How Do You Prove an Accident Worsened a Preexisting Condition?
Proving that an accident aggravated a preexisting condition often requires showing a clear difference between the person's health before the accident and afterward. Medical records can be especially important because they help establish whether symptoms were absent, mild, intermittent, or stable before the incident and how the person's condition changed afterward.
One challenge is distinguishing accident-related harm from the natural progression of an existing medical condition. Depending on the circumstances, useful evidence may include:
- medical records from before and after the accident
- physician notes and opinions about causation
- X-rays, MRIs, and other diagnostic imaging
- physical therapy and rehabilitation records
- changes in medications or treatment recommendations
- surgical recommendations
- records showing new work restrictions or missed work
- documentation of changes in mobility and daily activities
A complete medical timeline often provides more context than any single examination or imaging study. For example, earlier records may show occasional back pain managed with conservative treatment, while records after an accident may document new radiating pain, neurological symptoms, increased treatment, or new physical limitations. That comparison can help medical providers evaluate whether the accident caused a meaningful change.
The timing and consistency of treatment can also matter. Seeking medical care promptly can help document when new or worsening symptoms appeared. A delay in treatment does not necessarily prevent a claim, but it may make causation more difficult to establish. Keeping recommended follow-up appointments and documenting changes in symptoms and treatment can provide a clearer picture of recovery.
Once the condition has stabilized, medical providers may also be better able to evaluate whether the accident caused lasting limitations or will require future treatment. The extent to which accident-related harm can be separated from the natural progression of a preexisting condition depends on the medical evidence and applicable state law.
How Insurance Companies Evaluate Preexisting Conditions
A preexisting condition does not automatically defeat a personal injury claim, but it can make questions about medical causation and damages more complicated. When a claim involves an earlier injury or medical condition, insurers often examine relevant medical history to determine how much of the person's current condition can be attributed to the accident.
Depending on the claim, insurers may review:
- prior medical records involving the same body part or similar symptoms
- records of previous accidents or injury claims
- earlier imaging studies
- relevant prescription and treatment history
- prior physical limitations or treatment recommendations
Disputes may arise over whether similar symptoms existed before the accident, how significantly the condition changed afterward, whether additional or future treatment is related to the accident, and whether natural degeneration or another medical condition contributed to the person's current symptoms.
This is why an accurate medical history can be important. A documented period of stability before an accident, for example, may help distinguish an earlier condition from a significant increase in symptoms or treatment afterward. Conversely, records showing active treatment immediately before an accident may require a closer analysis of what additional harm the accident caused.
Being open about relevant prior injuries is also important. Attempting to conceal an earlier condition can create credibility problems if those records later become part of the claim. The existence of a prior injury is not necessarily the problem; the key issue is accurately showing what changed because of the accident.
How Are Damages Calculated When a Preexisting Condition Is Involved?
The presence of a preexisting condition does not automatically determine the value of a personal injury claim. The focus is generally on the harm caused by the accident and how that harm affected the injured person's health, treatment needs, ability to work, and daily life.
Depending on the circumstances and applicable state law, recoverable damages may include:
- additional medical expenses caused by the accident
- future treatment related to an aggravated or accelerated condition
- lost wages
- diminished earning capacity
- pain and suffering associated with accident-related injuries or worsening symptoms
A defendant ordinarily is not responsible for pain, disability, medical expenses, or other losses that would have existed regardless of the accident. However, compensation may be available for additional harm caused when an accident aggravates an existing condition or accelerates its progression.
The eggshell plaintiff rule may also apply when an underlying vulnerability causes an accident to produce more serious consequences than it would have caused in a healthier person. Because the rules governing causation and the separation of preexisting and accident-related harm vary by state, medical evidence often plays an important role in determining which damages are attributable to the accident.
Common Mistakes to Avoid After an Accident
When a preexisting condition is involved, certain decisions can make it more difficult to show how an accident affected your health.
Common mistakes include:
- delaying medical care after new or worsening symptoms appear
- skipping recommended follow-up appointments
- failing to tell treating providers about relevant prior injuries or medical conditions
- discontinuing recommended treatment without discussing the decision with a healthcare provider
- assuming that a preexisting condition automatically prevents you from pursuing a claim
- posting about your injuries, physical activities, or recovery on social media without considering how those posts could be interpreted
Consistency is especially important in these cases. Medical records that accurately document your prior condition, new symptoms, treatment, and recovery can help provide a clearer picture of what changed after the accident.
Protecting Your Rights When a Preexisting Condition Is at Issue
A personal injury claim can become more complicated when an existing medical condition is part of the picture. Keeping accurate records and clearly documenting changes after the accident can help distinguish your prior health from accident-related harm.
Practical steps may include:
- keeping copies of medical records, bills, and treatment recommendations
- documenting changes in symptoms and physical limitations
- preserving records showing how your condition affects work and daily activities
- providing accurate information about relevant prior injuries and treatment
- considering legal advice before accepting a settlement that may affect your ability to recover compensation for future accident-related losses
Every case presents different medical and legal questions. The attorneys at Brandon J. Broderick, Attorney at Law, can review relevant medical history and evidence, evaluate how an accident may have affected a preexisting condition, and help pursue compensation for accident-related losses.
Frequently Asked Questions About Preexisting Conditions
Can I still file a claim if I had a preexisting condition?
In many cases, yes. A preexisting condition doesn't automatically prevent a claim. If the accident made an existing injury or illness worse, you may still have legal options. Medical evidence often helps show how your condition changed after the accident.
Do I have to disclose a prior injury or medical condition?
Relevant prior injuries and medical conditions generally should not be concealed when they relate to the injuries or damages being claimed. Medical records from before the accident may be important for comparing your condition before and after the incident. However, the scope of medical information an insurer or opposing party may obtain depends on the issues in the case and applicable state law.
Can an insurance company deny my claim because I had arthritis or another chronic condition?
Having arthritis or another chronic condition doesn't automatically end your claim. Insurance companies often look closely at medical records to determine whether the accident caused new problems or made an existing condition worse. Clear documentation from your healthcare providers can make a meaningful difference.
What if I didn't have symptoms before the accident?
That's not uncommon. Some medical conditions remain stable for years before an accident causes new pain or makes existing symptoms worse. Medical records and your doctor's evaluation can help explain what changed.
How can a personal injury attorney help if I have a preexisting condition?
Cases involving preexisting conditions often require a closer look at medical records and treatment history. An experienced personal injury attorney can help organize that evidence, work with your healthcare providers, and explain how it may affect your claim.
Brandon J. Broderick, Attorney at Law, Protects Your Interests
Insurance companies often focus on what happened before the accident. Your claim deserves equal attention to what happened afterward.
When a crash aggravates an existing condition, the right medical evidence can make the difference between a disputed claim and one supported by documented changes in your health. If you're unsure how a prior injury may affect your case, reach out to Brandon J. Broderick, Attorney at Law, for a free consultation and answers tailored to your situation.