Does an Amputation Qualify as Catastrophic Impairment in Ontario After a Motor Vehicle Accident?

Yes. In Ontario, a person who suffers a trans-tibial or higher amputation of a leg in a motor vehicle accident meets the listed amputation test for catastrophic impairment under the Statutory Accident Benefits Schedule. An amputation of an arm, or another injury causing the total and permanent loss of use of an arm, also meets the listed test.

By Lane Foster, Personal Injury Lawyer

Last Updated: May 2026

The position is different for amputations involving toes, fingers, part of a hand or part of a foot. Those injuries can permanently change a person’s mobility, employment and independence, but they do not fall automatically within the specific amputation wording of the CAT definition. Depending on the full injury picture, another catastrophic impairment route can still apply.

This article addresses the catastrophic test under Ontario’s automobile accident benefits system. For information about compensation claims involving traumatic limb loss more broadly, see our page on Ontario amputation injury lawyers.

Ontario’s Criterion 2 Test for Amputation and Severe Limb Loss

“Catastrophic impairment” is a legal designation under Ontario’s accident benefits system. It is not simply a description of an especially serious injury. The injury must satisfy one of the tests in section 3.1 of the Statutory Accident Benefits Schedule, usually called the SABS.

For motor vehicle accidents occurring on or after June 1, 2016, Criterion 2 addresses severe impairment of mobility or use of an arm, as well as specified amputations. It includes:

• a trans-tibial or higher amputation of a leg;

• an amputation of an arm, or another impairment causing the total and permanent loss of use of an arm; and

• a severe and permanent alteration of one or both legs that results in the required score on the prescribed indoor mobility measure.

The statutory wording is found at section 3.1 of Ontario’s Statutory Accident Benefits Schedule.

Do Below-Knee and Above-Knee Amputations Qualify as CAT in Ontario?

Yes, where the amputation results from a motor vehicle accident governed by the SABS.

A below-knee amputation is medically described as a trans-tibial amputation. The SABS expressly identifies a trans-tibial or higher amputation of a leg as catastrophic impairment. An above-knee amputation is higher than that threshold and falls within the same wording.

This means that person with a qualifying leg amputation does not have to first establish a 55% whole-person impairment rating simply to prove that the listed amputation test has been met. The level of amputation itself falls within Criterion 2.

There is still a formal process to establish catastrophic impairment. Medical records must confirm the amputation level, the limb loss must result from the motor vehicle accident, and an application for determination of catastrophic impairment must be submitted to the accident benefits insurer.

Does an Arm Amputation Qualify as Catastrophic Impairment?

Yes, criterion 2 includes an amputation of an arm. It also recognizes that a devastating upper-limb injury does not always result in surgical removal of the arm. A person can qualify under this part of the test where another injury causes the total and permanent loss of use of an arm.

This wording can apply in situations where there are severe crush injuries, brachial plexus damage, vascular injury, extensive nerve damage or unsuccessful reconstruction. Surgeons may preserve the limb anatomically, but the injured person can still be left permanently without functional use of the arm.

A serious hand injury is different. A partial hand amputation or finger amputation can cause profound disability, particularly for someone who works with tools, machinery or fine motor skills. But the regulation refers to an arm amputation or total and permanent loss of use of an arm. Those claims require an analysis of the actual impairment and the correct statutory route rather than an assumption that Criterion 2 applies automatically.

Do Partial Foot, Toe, Hand or Finger Amputations Automatically Qualify as CAT?

No. They do not automatically meet the listed amputation wording merely because part of an extremity has been lost.

A partial foot amputation can seriously affect gait, balance, footwear, mobility and the ability to use a prosthesis. The loss of fingers or part of a hand can end a person’s ability to return to skilled manual work or perform ordinary tasks independently. Those losses can form the basis of significant compensation claims.

However, the direct Criterion 2 wording is narrower. For a leg amputation, it begins at a trans-tibial, or below-knee, amputation. For an upper limb, it refers to an amputation of an arm or total and permanent loss of use of an arm.

Where an injury falls outside that wording, the question becomes whether the person qualifies through another CAT route. One possible route is a physical impairment or combination of physical impairments resulting in 55% or more whole-person impairment under the required edition of the AMA Guides.

A person with a partial foot amputation, for example, might also have extensive nerve damage, repeated surgeries, chronic infection, serious walking restrictions and other permanent physical injuries arising from the same collision. That case requires a broader assessment than a direct trans-tibial amputation claim.

Is There a Waiting Period Before Applying for CAT Status After a Qualifying Amputation?

The SABS does not impose the same waiting restriction on a qualifying Criterion 2 amputation that applies to certain whole-person impairment routes.

The regulation contains a timing restriction for the 55% physical whole-person impairment test and the combined physical and mental or behavioural impairment test. Under those routes, an assessment generally cannot proceed until two years have passed since the accident, unless the required earlier medical opinion is available after at least three months.

Those restrictions are directed at the whole-person impairment routes. They are not stated to apply to Criterion 2.

Where a person has suffered a documented trans-tibial or higher amputation of a leg, an amputation of an arm, or another injury causing total and permanent loss of use of an arm, the CAT application can rely directly on Criterion 2 without waiting two years for a whole-person impairment assessment.

That timing can be critical in an amputation case. Prosthetic planning, rehabilitation, occupational therapy, attendant care, mobility equipment and accessible housing needs often arise well before the person’s longer-term medical condition has stabilized.

What If the Amputation Happens Later, After Surgeons First Try to Save the Limb?

Not every traumatic amputation happens at the collision scene or during the first emergency surgery.

A person may initially suffer a severe crush injury, open fracture, vascular injury, extensive tissue loss or serious infection. Surgeons may attempt reconstruction, vascular repair, skin grafting or other limb-salvage procedures before it becomes clear that the limb cannot be saved, or cannot be preserved without continued pain and repeated complications.

Where an amputation happens later, the central legal question is whether it resulted from the injuries caused by the motor vehicle accident.

If the medical evidence connects a later trans-tibial or higher leg amputation, or an arm amputation, to the collision injuries, Criterion 2 can still apply. An unsuccessful attempt to save the limb does not change the origin of the injury.

These claims often require careful collection of the full treatment history: emergency records, operative reports, orthopedic and vascular notes, infection or tissue-loss evidence, rehabilitation records and the clinical reasoning that led to the eventual amputation.

Delayed amputations still produce substantial losses before the surgery occurs. The injured person might have to endure repeated hospital admissions, extended inability to work, significant pain, unsuccessful rehabilitation and months of uncertainty before permanent limb loss becomes unavoidable.

Why CAT Status Matters After an Amputation

The consequences of limb loss continue long after the initial surgery.

An amputee can require a prosthesis, repeated fittings and replacements, physiotherapy, occupational therapy, chronic pain treatment, psychological treatment, mobility devices, home modifications, vehicle adaptation and attendant care. Some people experience phantom limb pain, neuroma pain, skin breakdown, an inability to tolerate a prosthesis or further surgery to the residual limb.

Catastrophic impairment determinations are important since they places the injured person in the highest medical, rehabilitation and attendant care category under Ontario’s accident benefits system.

Under the current SABS framework, a person determined to have sustained a catastrophic impairment can access up to $1,000,000 in combined medical, rehabilitation and attendant care benefits for an accident, subject to the statutory rules and any applicable optional coverage.4

CAT status does not mean that every proposed treatment or expense is automatically approved. Treatment plans, assessments and attendant care needs still have to be submitted and properly supported. But where an amputee qualifies as catastrophically impaired, the determination can materially change the resources available for recovery and long-term care.

For an overview of the other catastrophic impairment pathways in Ontario, see our Catastrophic Impairment in Ontario: Complete 2026 SABS CAT Guide.

How Is a CAT Application Made After an Amputation?

A person seeking a catastrophic impairment determination applies to the accident benefits insurer using an OCF-19: Application for Determination of Catastrophic Impairment.

In a direct amputation case, the application will typically rely on medical documentation confirming the motor vehicle accident, the nature and level of the amputation, the connection between the accident injuries and the limb loss, and the applicable catastrophic impairment criterion.

For a trans-tibial or higher leg amputation, or an arm amputation, hospital and operative records will often establish the central physical fact clearly. In a delayed amputation case, additional evidence explaining the attempted limb-salvage course and the relationship between the collision injuries and eventual amputation becomes particularly important.

Under section 45 of the SABS, the CAT assessment or examination is conducted by a physician, with assistance from other regulated health professionals where reasonably required. Once the insurer receives a completed application prepared and signed by the person conducting the assessment or examination, the insurer must respond within 10 business days by either accepting that the impairment is catastrophic or providing reasons for refusing the determination and advising whether it requires an insurer examination.

The appropriate CAT application form can be obtained from the Financial Services Regulatory Authority of Ontario’s OCF-19 page. FSRA has published separate forms for policies effective before July 1, 2026 and policies effective on or after July 1, 2026.

What Evidence Matters in an Amputation CAT Claim?

In a direct Criterion 2 claim, the level of amputation can establish the listed CAT route. But the case does not end once catastrophic impairment is recognized.

Serious amputation claims also require evidence demonstrating how the injury affects the person’s actual life: mobility, pain, personal care, prosthetic requirements, work, psychological health, household independence and future cost of care.

The important records commonly include hospital and surgical documentation confirming the amputation level, rehabilitation medicine evidence, prosthetic assessments, occupational therapy reports, physiotherapy records, chronic pain treatment records and future care evidence.

This evidence serves multiple purposes. It supports the accident benefits claim for necessary treatment and assistance. It can also support a separate lawsuit against responsible parties for income loss, future care expenses and the permanent effect of limb loss on the person’s life.

In a partial amputation or limb-salvage case, the evidence can also become necessary to determine whether another CAT route applies, including a whole-person impairment assessment or the total and permanent loss of use of an arm test.

Amputation is one of the most serious injuries that can result in a catastrophic impairment claim after a car accident. For information regarding representation in claims involving permanent, life-changing injuries and substantial long-term care needs, see our page on Ontario catastrophic injury lawyers.

Does CAT Status Apply to Every Ontario Amputation Claim?

No. The catastrophic impairment designation discussed in this article is part of Ontario’s automobile accident benefits system.

It applies where the qualifying impairment results from an automobile accident. That can include a driver or passenger who loses a limb in a crash, a motorcyclist whose injuries require amputation, a pedestrian struck by a vehicle or a cyclist injured in a collision involving an automobile.

Other amputation cases can be just as serious but involve a different legal route. An amputation caused by unsafe machinery, boating accidents, medical negligence or another incident that does not involve an automobile is not a SABS CAT claim merely because the injury is life-changing.

Those cases can still involve substantial compensation for prosthetic needs, future care, income loss, pain and suffering and permanent loss of function. The difference is that Ontario’s SABS catastrophic impairment application is tied to automobile accidents.

Does Fault Prevent an Amputee From Applying for CAT Accident Benefits?

No. Fault does not prevent an injured person from applying for Ontario accident benefits or a catastrophic impairment determination.

A driver, passenger, pedestrian, cyclist or motorcyclist who suffers a qualifying amputation in an automobile accident can pursue the accident benefits claim even where responsibility for the crash is disputed or the injured person caused the collision. The catastrophic issue is whether the impairment resulted from the accident and meets the SABS definition.

Fault remains important for a potential, separate lawsuit against an at-fault driver, vehicle owner, municipality, manufacturer or other responsible party. In many serious amputation cases, the injured person has both an accident benefits claim and a tort claim.

The accident benefits claim addresses benefits available through the automobile insurance system. The lawsuit addresses losses caused by the responsible party, including pain and suffering, income loss, future care expenses and other damages.

For more information about the no-fault benefits process, see our page on Ontario accident benefits lawyers.

Frequently Asked Questions About Amputation and Catastrophic Impairment in Ontario

Does a below-knee amputation qualify as catastrophic impairment in Ontario?

Yes. If it results from an automobile accident, a trans-tibial, or below-knee, amputation meets the listed Criterion 2 catastrophic impairment definition under the SABS for accidents occurring on or after June 1, 2016. The injured person must still complete the formal CAT determination process with the insurer.

Does an above-knee amputation qualify for CAT benefits?

Yes. An above-knee amputation is higher than a trans-tibial amputation and falls within the listed leg-amputation wording where it results from an automobile accident.

Does an arm amputation qualify as CAT?

Yes. Criterion 2 includes an amputation of an arm. It also includes another impairment causing total and permanent loss of use of an arm.

Does a partial foot or hand amputation automatically qualify as catastrophic impairment?

No. The direct amputation wording is narrower. A partial foot, toe, hand or finger amputation requires analysis under the correct statutory route and the full medical evidence. In a serious case, another catastrophic impairment pathway can still apply.

Can a later amputation qualify if doctors first tried to save the limb?

Yes. Where the medical evidence establishes that a later qualifying amputation resulted from injuries caused by the automobile accident, Criterion 2 still applies. A failed attempt to preserve the limb does not prevent the amputation from being linked to the collision.

Is there a two-year waiting period for a qualifying amputation CAT claim?

The two-year restriction can sometimes become an issue in whole-person impairment pathways, not to the direct Criterion 2 amputation wording. A qualifying leg or arm amputation can be assessed under Criterion 2 without waiting two years for a whole-person impairment assessment.

Can I apply for CAT benefits if I caused the accident?

Yes. Fault does not prevent an injured person from applying for statutory accident benefits or a CAT determination. Fault is separately relevant to any lawsuit against another responsible party.

Speak With an Ontario Amputation Injury Lawyer

A traumatic amputation after an automobile accident can fall directly within Ontario’s catastrophic impairment definition. But establishing CAT status is only one part of protecting the injured person’s future.

A serious amputation claim can involve prosthetic care, long-term rehabilitation, attendant care, loss of income, home or vehicle changes, future care planning and a separate claim against those responsible for the collision.

Foster Injury Law represents people across Ontario who have suffered amputations and other permanent, life-changing injuries. Learn more about these claims on our page about Ontario amputation injury lawyers, or contact us for a free consultation.

This article provides general information about Ontario personal injury and accident benefits law. It is not legal advice about a specific claim.