Yes, a pre-existing condition can affect an Arizona personal injury claim, but it does not automatically prevent an injured person from pursuing compensation. The key question is whether the accident caused a new injury or worsened an existing condition and what evidence can establish that change.
At Whitney | Whitney | Baldridge | Atkinson, we look closely at the person’s health before the accident, the symptoms that followed, medical treatment, and the evidence connecting those changes to the incident.
Can You File a Personal Injury Claim If You Were Already Injured?
Having an existing injury or medical condition does not by itself eliminate a potential personal injury claim.
Arizona personal injury cases focus on the harm caused by the incident at issue. If an accident aggravates or worsens a condition that already existed, the additional harm may become part of the damages analysis.
Arizona’s civil jury instructions specifically recognize aggravation of pre-existing conditions when determining personal injury damages. They distinguish between the condition that existed before the incident and the additional harm caused by its worsening.
Our personal injury attorneys evaluate that distinction carefully because the medical history before and after an accident can become central to the claim.
What Is Considered a Pre-Existing Condition?
A pre-existing condition is generally a health problem, injury, or physical limitation that existed before the accident involved in the claim.
Examples might include prior back or neck problems, joint conditions, an earlier injury to the same part of the body, or another medical condition that affects the symptoms experienced after an accident.
The existence of the condition is not necessarily the central issue. Instead, the question often becomes whether the person’s condition changed because of the new incident.
A lawyer reviewing the claim may compare earlier medical records with records created after the accident to understand that difference.
How Do You Show That an Accident Made a Condition Worse?
Medical documentation can be particularly important when an insurer argues that symptoms existed before an accident.
Records from before the incident may establish the person’s previous condition, treatment history, symptoms, and physical limitations. Records created afterward may show new complaints, increased symptoms, additional treatment, or changes in the person’s abilities.
The timing of those changes can also matter.
For example, someone may have received occasional treatment for a back condition before a collision but experienced significantly different or more persistent symptoms afterward. The claim would need to address what changed rather than presenting the earlier condition as though it never existed.
A law office handling these cases may also review accident reports, photographs, witness information, employment records, and other documentation alongside medical evidence.
Why Should You Be Open About Your Medical History?
Accuracy is important.
Trying to hide an earlier injury can create credibility problems if an insurance company later obtains medical records showing prior treatment. A pre-existing condition does not automatically defeat a claim, so concealing it can create an unnecessary complication.
Instead, the medical history should be evaluated honestly.
At our law firm, we want to understand what a client’s condition was before the accident and what changed afterward. That allows us to evaluate the claim based on the actual evidence rather than leaving unanswered questions about earlier treatment.
Can an Insurance Company Blame Everything on the Previous Condition?
An insurance company may argue that current symptoms are related to a condition that existed before the accident rather than the accident itself.
That argument does not automatically resolve the issue.
The evidence may show that a person was relatively stable before the incident and required significantly different treatment afterward. Alternatively, medical records may show that some symptoms continued unchanged from before the accident.
Determining causation often requires reviewing both periods.
This is one reason local lawyers handling personal injury matters may request records that predate the accident. Those records can provide a baseline for evaluating the person’s health before the new injury occurred.
What Types of Evidence Can Help Establish Aggravation?
Several forms of evidence may help explain how a person’s condition changed.
Medical records are often central because they document symptoms, examinations, diagnoses, treatment, and provider recommendations. Diagnostic testing may also provide relevant information depending on the injury.
Other evidence can include:
- Records showing the person’s activity level before the accident
- Employment records documenting new work limitations
- Photographs showing visible injuries or physical changes
- Statements from people familiar with the person’s abilities before and after the incident
- Records showing changes in treatment following the accident
The goal is to establish a clear comparison rather than simply proving that the claimant had a medical condition.
How Common Are Injury-Producing Crashes in Arizona?
Arizona’s latest completed statewide crash data illustrates why accident-related injuries remain a significant issue.
The Arizona Department of Transportation reported that speeding was cited in crashes resulting in 20,722 injuries during 2024, representing 38% of all traffic injuries recorded statewide that year.
Vehicle accidents are only one source of personal injury claims, but these numbers demonstrate how frequently Arizona residents experience injuries in roadway incidents.
For someone who already has a medical condition, the question following an accident may therefore be not whether they were perfectly healthy beforehand, but whether the new incident caused additional harm.
Does Arizona’s Comparative Fault Rule Affect the Claim?
Pre-existing medical conditions and comparative fault are separate issues.
Arizona follows a comparative negligence framework in many negligence cases. Under Arizona law, damages may be reduced based on the claimant’s percentage of fault when comparative negligence applies.
A prior medical condition, however, is not the same as causing an accident.
The analysis should distinguish between responsibility for the incident and questions about how much of the person’s current condition resulted from it.
When Should You Speak With a Lawyer About a Pre-Existing Condition?
It can be useful to obtain legal guidance when an insurer disputes whether an accident caused new harm, requests extensive medical records, or argues that symptoms are entirely attributable to an earlier condition.
At Whitney | Whitney | Baldridge | Atkinson, we can review the accident, prior medical history, subsequent treatment, and other evidence to determine how a pre-existing condition may affect an Arizona personal injury claim.
If you were injured and are concerned about how an earlier condition could affect your case, contact Whitney | Whitney | Baldridge | Atkinson or call (928) 753-5295 to discuss your situation with our team.