Feb 2 2026 | Joseph Zayouna

How Catastrophic Injury Claims Are Built: The Evidence Checklist Every Ontario Family Needs

When a family member suffers a catastrophic injury in Ontario, the legal and insurance process that follows is among the most complex and consequential they will ever face. The difference between a successful catastrophic designation and a denied or delayed one is almost always the quality and completeness of the evidence gathered from the beginning of the claim.

This checklist is written for families navigating the aftermath of a serious accident involving a traumatic brain injury, spinal cord injury, severe orthopaedic trauma, or another condition that has permanently changed your loved one’s ability to function. It is designed to be practical and actionable from the first days after the accident, not months later when critical evidence may already be lost.

For a full explanation of what catastrophic impairment means in Ontario law and what benefit limits apply, visit the personal injury law page at zaylaw.com. For questions about accident benefits disputes and the Minor Injury Guideline, see our companion articles on Minor Injury Guideline disputes and independent medical exams in Ontario. For immediate legal help, contact our team at zaylaw.com/contact-us.

What Is Catastrophic Impairment in Ontario and Why Does the Designation Matter?

A determination of catastrophic impairment under the Statutory Accident Benefits Schedule (SABS) unlocks dramatically higher benefit limits for injured accident victims:

The catastrophic impairment criteria in Ontario are defined in the SABS and include, among other categories: paraplegia or quadriplegia; total loss of vision; loss of limb; severe traumatic brain injury meeting a defined clinical threshold; and severe impairment of physical and mental functions assessed under the American Medical Association Guides to the Evaluation of Permanent Impairment. The insurer will conduct its own assessment to contest the designation, which is why the quality of the claimant’s evidentiary record is decisive.

If the claim also involves a tort action against the at-fault driver, visit the car accident lawyer page at zaylaw.com/car-accidents for an overview of how tort and accident benefits claims interact.

The Catastrophic Injury Evidence Checklist: What to Gather from Day One

Section 1: Medical Records

Medical records form the foundation of a catastrophic designation application. Begin gathering and organising these as early as possible.

• Emergency room and hospital admission records from the date of the accident
• Surgical reports and operative notes from any procedures performed
• Intensive care and specialist consultation records from the acute phase of treatment
• All imaging reports: CT scans, MRI reports, X-rays, and any functional imaging
• Physiatry, neurology, orthopaedic, and rehabilitation medicine records
• Neuropsychological assessment reports (critical for traumatic brain injury claims; see zaylaw.com/brain-injury)
• Psychiatric and psychological assessment and treatment records
• All family physician records both before and after the accident date
• Discharge summaries from any inpatient rehabilitation facility
• Occupational therapy and physiotherapy records documenting functional limitations
• Speech language pathology records where communication or swallowing is affected

Section 2: Daily Symptoms and Function Log

A contemporaneous record of how the injured person’s symptoms and abilities change over time is powerful evidence. A log compiled from the earliest stages of recovery is far more persuasive than one compiled retrospectively months or years later.

• Daily pain levels on a consistent scale (0 to 10), with location and character of pain noted
• Sleep quality and duration each night; note wakings due to pain, nightmares, or other symptoms
• Cognitive symptoms: memory failures, word-finding difficulties, confusion, difficulty concentrating
• Emotional and psychological state: anxiety levels, panic episodes, flashbacks, mood changes, irritability
• Activities attempted and whether completed, partially completed, or abandoned due to symptoms
• Medications taken each day and any side effects affecting daily function
• Medical appointments attended and key points discussed
• Any falls, near-falls, or safety incidents related to the injury
• Observations by family members of changes in personality, behaviour, or independence

Section 3: Attendant Care and Caregiver Documentation

Attendant care benefits in catastrophic claims can be substantial. The foundation of these benefits is documented evidence of the care being provided, who provides it, and the time it requires.

• A daily log of all caregiving tasks performed, noting who performed each task and the time required
• Personal hygiene assistance: bathing, dressing, grooming, toileting
• Meal preparation and feeding assistance where required
• Medication administration and management
• Transportation to medical appointments: dates, destinations, and travel time
• Night-time supervision or assistance where required for safety
• Any professional home care or nursing visits: provider name, date, duration, and tasks performed
• Form 1 (Assessment of Attendant Care Needs) completed by a qualified occupational therapist; request this as early as possible as it establishes the formal basis for attendant care benefits

Section 4: Financial and Expense Records

Documenting the financial impact of a catastrophic injury begins immediately. Many expenses incurred in the early months are recoverable but only if contemporaneously documented.

• All prescription receipts and pharmacy records from the accident date forward
• Medical equipment and assistive device purchases: receipts, invoices, and any prescriptions or recommendations
• Home modification expenses: quotes, invoices, and supporting occupational therapist recommendations
• Vehicle modification expenses where applicable
• Private nursing and personal support worker invoices
• Transportation receipts for medical appointments: mileage logs, parking receipts, taxi or ride-share records
• Lost income documentation: pay stubs, employment records, T4s, and self-employment income records
• Cost of additional household help hired because the injured person can no longer perform household tasks
• Any out-of-pocket treatment costs not covered by the insurer during the claims period

Section 5: Witness Information

Witnesses who observed the accident, the immediate aftermath, or the ongoing impact of the injury on the claimant’s life can provide important corroborating evidence.

• Full names and contact information of all witnesses to the accident itself
• Names and contact information of first responders, paramedics, or bystanders who assisted at the scene
• Employers, colleagues, or supervisors who can speak to pre-accident capabilities and post-accident changes in work capacity
• Friends, neighbours, and extended family members who can describe observed changes in personality, memory, physical ability, or independence since the accident
• Any treating health professionals willing to provide collateral observations beyond formal clinical records

Section 6: Pre-Accident Baseline Documentation

Establishing what the injured person was capable of before the accident is as important as documenting what they cannot do after it. This baseline is used to measure the true extent of impairment.

• Pre-accident medical records, particularly specialist records or diagnostic imaging for direct comparison
• Employment records showing pre-accident income, position, duties, and performance
• Educational records if the injured person was a student at the time of the accident
• Records of pre-accident recreational, athletic, or volunteer activities
• Statements or affidavits from family members, friends, or colleagues describing the person’s pre-accident abilities and daily life

Section 7: Critical Legal Deadlines

• 7 days: Report the accident to your insurer; failure to report promptly can complicate benefits claims
• 30 days: Submit your Accident Benefits application (OCF-1) to the insurer; delay can affect benefit start dates
• 2 years: The general limitation period for commencing a tort action against the at-fault party in Ontario
• 2 years: The limitation period for most LAT applications relating to accident benefits disputes, running from the date of the insurer’s refusal or failure to pay
• As soon as possible: Application for catastrophic impairment designation; the sooner the application is made with supporting evidence, the sooner the higher benefit limits become available
• 104 weeks (2 years after the accident): Several benefit categories change at this point; your lawyer must anticipate these changes well in advance

What Happens After the Evidence Is Gathered?

The Formal Catastrophic Designation Assessment Process

Once sufficient medical evidence has been gathered, your legal counsel will coordinate the formal catastrophic impairment designation application. This typically involves retaining qualified assessors in the relevant specialties, including neuropsychologists for brain injury claims (zaylaw.com/brain-injury), physiatrists for physical impairment assessments, and psychiatrists or psychologists for mental and behavioural impairment assessments.

The insurer will respond with its own assessors. The competing assessments are submitted, and if the insurer denies the catastrophic designation, the matter proceeds to the LAT. At the LAT, the quality and completeness of your evidentiary record is decisive. The checklist above is the foundation of that record.

The Tort Claim: Pursuing Compensation Beyond Accident Benefits

In addition to accident benefits, a catastrophically injured person in Ontario typically has a tort claim against the at-fault driver or other responsible parties. Tort damages include compensation for pain and suffering, loss of income, future care costs, and other losses not covered by the accident benefits system.

The evidence gathered using the checklist above is relevant to both the accident benefits and the tort claim. Families who begin preserving evidence from the earliest stages of recovery put their legal team in the strongest possible position for both processes. The car accident lawyers at Zayouna Law Firm (zaylaw.com/car-accidents) handle both streams of a catastrophic injury file.

Frequently Asked Questions