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6 March 2025

Challenges Of Pre-Existing Conditions In Ontario Car Accident Claims

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Nelligan Law

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Insurance companies often scrutinize these cases, trying to attribute injuries to prior health issues instead of the accident. Let's discuss how pre-existing conditions affect the compensation process and strategies...
Canada Ontario Litigation, Mediation & Arbitration

Navigating an Ontario car accident claim becomes more complex when pre-existing conditions are involved.

Insurance companies often scrutinize these cases, trying to attribute injuries to prior health issues instead of the accident. Let's discuss how pre-existing conditions affect the compensation process and strategies to manage these challenges effectively.

What Are Pre-Existing Conditions?

Pre-existing conditions are medical issues that existed before the car accident, such as back problems, joint disorders, or previous concussions. These conditions can complicate the assessment of injuries caused by a car accident.

Impact on Ontario Car Accident Claims

  1. Causation Challenges: Proving that the injuries are directly related to the accident is crucial. In some cases, the proof required is that the accident significantly worsened a pre-existing condition.
  2. Insurance Company Skepticism: Insurers may argue that the damages claimed are due to pre-existing conditions to reduce their liability.
  3. Compensation Reduction: If insurers can show that injuries are related to pre-existing conditions, compensation may be reduced.

Proving the Impact of the Accident

To overcome these challenges, it's crucial to establish a clear link between the accident and the injuries:

  • Medical Documentation: Keep comprehensive medical records that distinguish between pre- and post-accident conditions.
  • Expert Medical Testimony: Experts can provide credible testimony on how the accident aggravated pre-existing conditions or caused new injuries.
  • Consistent Medical Treatment: Continuity in medical treatment strengthens your claim by showing how the accident impacted your health.

Legal Strategies for Handling Pre-Existing Conditions in Ontario

  1. Full Disclosure: Be upfront about pre-existing conditions to avoid undermining your credibility.
  2. The "Thin Skull" Doctrine: In Ontario, this legal principle holds that a defendant is responsible for all injuries, even if the plaintiff was more vulnerable due to pre-existing conditions.
  3. Accurate Medical Assessment: Ensure that medical assessments clearly separate injuries caused by the accident from pre-existing issues.

The content of this article is intended to provide a general guide to the subject matter. Specialist advice should be sought about your specific circumstances.

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