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Your Ontario Accident Claim Was Denied. Here Is What to Do Next.

A denial from your insurer is not the end. Ontario has a formal dispute process — but there are strict deadlines. Here is exactly what to do after a denial.

Insurer Disputes·5 min read
Trust & transparency: This article is for general information only and is not legal advice. Ontario Accident Review is not a law firm and does not provide legal advice.

You filed your accident benefits claim. You did what you were supposed to do. And then your insurer sent a letter telling you the claim is denied. It is a stressful, frustrating moment — and one that many people accept as final when it isn't.

A Denial Is Not the Final Word

Ontario law provides a formal dispute resolution process for accident benefit denials, handled through the Licence Appeal Tribunal — Automobile Accident Benefits Service (LAT-AABS). you may be able to challenge your insurer's decision, subject to applicable rules and deadlines.

Step 1: Note the Date of the Denial Letter

Accident-benefit disputes are time-sensitive. Note the denial-letter date and any deadline language immediately, and consider getting qualified legal advice about whether a LAT-AABS application deadline applies.

Step 2: Understand Why You Were Denied

  • Read the denial letter carefully. The most common reasons include:
  • Your injury was classified as a minor injury under the Minor Injury Guideline (MIG)
  • The insurer argues the treatment is not reasonable and necessary
  • An independent medical examination (IME) concluded your injuries are less severe than claimed
  • You missed a procedural deadline (late notice, incomplete forms)
  • The insurer disputes whether your condition pre-dates the accident

Step 3: Request an Internal Review (Optional)

Within 10 business days of a denial, you can request an internal review from your insurer. This is an informal process where the insurer reconsiders the decision. It can sometimes resolve clear-cut errors without formal proceedings. However, an internal review does not pause your 2-year LAT-AABS deadline — the clock keeps running regardless.

Step 4: Consider LAT-AABS if the Dispute Continues

If you and your insurer disagree about your entitlement to accident benefits or the amount payable, you may be able to apply to LAT-AABS, subject to applicable rules and deadlines. Official source: https://tribunalsontario.ca/lat-aabs/

If your claim has been denied or your benefits have been reduced, a private review can help you understand what your options are and whether the denial is likely worth challenging.

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