Case snapshot
At a glance
- Case
- Can a Car Accident Cause a Catastrophic Mental Impairment in Ontario?
- Court / Tribunal
- ONLAT
- Citation
- 2026 CanLII 115058 (ON LAT) ↗
- Date
- October 27, 2026
- Area of law
- Motor Vehicle Accident
- Key issue
- Whether a rear-end collision causing progressive physical and psychological symptoms met the threshold for a catastrophic mental and behavioural impairment under Criterion 8 of the Statutory Accident Benefits Schedule.
- Outcome
- The Licence Appeal Tribunal found that the applicant sustained a catastrophic impairment and awarded attendant care benefits of $2,934.75 per month going forward, along with one approved occupational therapy treatment plan and interest on overdue benefits. No s. 10 award was made because the applicant made no submissions on it.
- Why it matters
- This decision illustrates how the LAT weighs competing psychiatric assessments and a post-accident medical incident when deciding whether an injured person qualifies for the expanded benefits that flow from a catastrophic impairment designation.
Legal principle
The rule from this case
Under Criterion 8 of Ontario's Statutory Accident Benefits Schedule, a person sustains a catastrophic impairment from a mental or behavioural disorder if they have an extreme impairment in any one of four functional domains — activities of daily living, social functioning, concentration/persistence/pace, and adaptation — or a marked impairment in at least three of those four domains. The burden is on the injured person to prove this on a balance of probabilities. On causation, the LAT applied the "but for" test: the accident need not be the only cause of the impairment, but it must be a necessary cause. Pre-existing conditions do not automatically break the chain of causation. Where the treating family physician's notes do not address a later medical incident at all, and other specialists do not identify it as a new cause, the LAT may treat that incident as part of the progression of accident-related injuries rather than an intervening event.
Important limits
What this does not mean
This decision does not mean that every person who develops anxiety, PTSD, or chronic pain after a collision will automatically qualify as catastrophically impaired. The finding depended on a detailed review of years of clinical notes, competing psychiatric assessments, and evidence of marked functional deterioration across multiple domains. A single domain of marked impairment, or impairments that remain in the moderate range, would not meet the Criterion 8 threshold. The ruling also does not mean that attendant care benefits will be paid retroactively simply because entitlement is established. The LAT confirmed that an applicant must separately prove that attendant care expenses were actually incurred — for example, by hiring a paid provider or showing that a family caregiver suffered an economic loss. In this case, where that proof was absent, attendant care was payable only from the date of the decision onward, not from the date care was first needed.
What Does “Catastrophic Impairment” Mean for a Mental Health Claim in Ontario?
A catastrophic impairment designation unlocks a higher tier of accident benefits. For mental and behavioural impairments, the test under Criterion 8 of Ontario’s Statutory Accident Benefits Schedule requires proof of either an extreme impairment in one functional domain or marked impairments in at least three of four domains: activities of daily living, social functioning, concentration, persistence and pace, and adaptation.
In Gibbs v Intact Insurance Company, 2026 CanLII 115058 (ON LAT), the Licence Appeal Tribunal found that a person injured in a March 12, 2022 rear-end collision on Highway 401 had reached that threshold. Both psychiatrists, and the parties, agreed she had a marked impairment in activities of daily living and a moderate impairment in concentration, persistence and pace. The case turned on social functioning and adaptation, where the panel preferred the applicant’s psychiatrist, Dr. Liu, and found marked impairments in both domains.
How Did the Panel Handle the Causation Dispute?
Causation was the central battleground in this case. The insurer argued that a medical incident on April 4, 2024 — about two years after the accident — broke the chain of causation. On that day she had a spontaneous flare-up of back pain that impaired her ability to move and required an ambulance to hospital. The insurer said that incident, rather than the collision, was the primary cause of her current physical and psychological impairments.
The panel applied the “but for” test, as confirmed by the Divisional Court in Sabadash v. State Farm et al., 2019 ONSC 1121. Under that test, the accident must be a necessary cause of the impairment, though not the only one. Dr. Khalil’s family-physician notes did not address the April 4, 2024 incident at all. The only record of it was the emergency department record from that day, plus a brief April 11, 2024 pain-clinic note that she had fallen from her bed and attended the emergency department. An orthopedic surgeon, a pain medicine specialist, and a neurologist likewise did not identify the incident as a new or significant cause. The panel concluded the incident was part of the progression of her accident-related impairments, not an intervening event.
The panel was also not persuaded that a subsequent collision on August 19, 2022 materially contributed to her current impairment.
Why Did the Panel Prefer One Psychiatrist’s Opinion Over the Other?
Both sides retained psychiatrists to assess the four functional domains. Dr. Liu, for the applicant, found a marked impairment in activities of daily living, social functioning, and adaptation, and a moderate impairment in concentration, persistence and pace. Dr. Jwely, for the insurer, rated activities of daily living as marked and the other three domains as moderate.
The panel preferred Dr. Liu and found marked impairments in social functioning and in adaptation. Dr. Jwely’s own report recorded that she isolates herself, has significant conflict with family members, has limited intimacy with her partner, and has severe difficulty interacting with strangers and forming new relationships. The panel had difficulty reconciling those findings with his moderate social-functioning rating. Dr. Liu acknowledged her pre-existing PTSD but noted that she had remained functional before the accident and that her functioning deteriorated afterward.
She kept working as a transit station collector for about two years after the accident and stopped on April 5, 2024. The panel also let the insurer rely on late-served insurer examination reports dated July 10, 2026, because the delay in the psychiatry examination was mainly due to repeated rescheduling at the applicant’s request.
What Happened With the Attendant Care Claim?
The panel found the applicant needed attendant care — help with bathing, dressing, grooming, and footwear — as a result of her accident-related impairments. The insurer’s occupational therapist testified that if the deterioration after April 4, 2024 was related to the accident, the attendant care benefits in dispute would be reasonable and necessary. Once the panel resolved causation in the applicant’s favour, it awarded $2,934.75 per month.
However, the panel awarded attendant care only from the date of the decision onward, not for the period before the hearing. She had not shown that the expenses were incurred under section 3(7)(e) of the Schedule. She did not hire a provider, and there was no evidence that her husband, who provided the care, suffered an economic loss. She gave no evidence that the expense went unincurred because the insurer unreasonably withheld payment, so the panel could not deem it incurred under s. 3(8).
What About the Treatment Plans for Social Work and Occupational Therapy?
The panel approved an occupational therapy re-assessment plan of $1,995.51, finding it reasonable given the applicant’s ongoing functional limitations and the time elapsed since the prior assessment.
The panel denied the unapproved balances of both social work plans. Those balances related to the hourly rate ($145 proposed against $112.22 approved), 90-minute sessions where 60 minutes were approved, time for form completion and report writing, planning time, and, on the February 2025 plan, treatment proposed before an assessment. The applicant made no submissions on these points, so she did not meet her burden of proving the additional amounts were reasonable and necessary.
Questions and Records to Discuss With a Lawyer
- What documentation exists of your symptoms and functional limitations from the date of the accident to the present, including clinical notes, referral letters, and specialist reports?
- Has any treating or assessing professional addressed whether a subsequent injury or medical event was a new cause of your condition, or part of an ongoing progression?
- If a family member is providing care, is there any record of the economic impact that caregiving has had on their employment or income?
- Have any treatment plans been partially denied, and were the specific reasons for denial addressed at the time or preserved for dispute?
- What is the current status of your insurer’s examination reports, and were they served within the timelines set out in any case conference order?
If you have questions about your own accident benefits claim or a potential catastrophic impairment designation, the team at UL Lawyers is available to discuss your situation. Our Ontario motor vehicle accident lawyers work with injured people across the province, including those navigating complex accident benefits disputes at the LAT. You are welcome to reach out through /connect to share the details of your circumstances.
This article is automated commentary on a public court decision and is for general information only — not legal advice. Decisions rely on facts unique to each case. If you are affected by a similar issue, contact a lawyer for advice specific to your situation.
FAQ
Frequently asked questions
Under the AMA Guides used for Criterion 8 assessments, a marked impairment significantly impedes useful functioning, while a moderate impairment is compatible with some but not all useful functioning. You need marked impairments in at least three of four domains — or an extreme impairment in one domain — to qualify as catastrophically impaired on a mental or behavioural basis.
Not automatically. Ontario's "but for" causation test allows for pre-existing conditions as long as the accident was a necessary cause of the current level of impairment. In the Gibbs decision, the panel accepted the evidence of the applicant's psychiatrist, who acknowledged her pre-existing PTSD but noted that she remained functional before the accident and that her functioning deteriorated afterward.
Entitlement and payment are two separate questions under Ontario's accident benefits rules. Even if you are entitled to attendant care, you must also show the expense was actually incurred — meaning you received the service and paid, promised to pay, or the provider suffered an economic loss. If a family member provided unpaid care and no economic loss is documented, retroactive payment may not be available.