Yes, you can sue for medical malpractice in Ontario. The harder question, after almost two decades of practice in this area, is not whether the law gives you a right of action. It is whether your particular situation supports a claim that is worth bringing.
Most patients who call my office have a story that is genuinely difficult. They or a loved one have suffered a bad medical outcome, sometimes a catastrophic one, and they are looking for an explanation and accountability. The answer they are usually hoping for is yes, this was malpractice, and yes, the law has a remedy. The honest answer in many cases is more complicated.
This post is intended as a candid threshold assessment for patients who are wondering whether they have a claim. It is a companion to my more comprehensive overview, Suing for Medical Malpractice in Ontario: What You Need to Know, which sets out the legal process in detail. The purpose here is narrower: to help you assess, before you spend significant time and emotional energy, whether your situation is likely to fit the legal framework.
Bad care is not the same as medical malpractice
This is the most important distinction I draw with prospective clients. I often agree, after listening to a story, that the care described was not what it should have been. I sympathize. The communication may have been poor, the discharge rushed, the diagnosis delayed, the outcome worse than anyone expected. None of that, on its own, supports a malpractice claim.
A medical malpractice claim requires three things, and all of them must be present:
- The care fell below the standard a reasonable practitioner would have provided in the circumstances (breach of the standard of care)
- The substandard care caused a worse outcome than would have occurred with reasonable care (causation)
- The worse outcome produced compensable harm (damages)
If any of these is missing, the claim cannot succeed regardless of how strongly you feel about what happened. For a deeper discussion of each element, including how each is proven through expert evidence, see the foundational post linked above.
The element that defeats most claims is the second one: causation. Many cases involve clear breaches of the standard of care that nevertheless did not cause the outcome the patient experienced, because the underlying disease was already advanced, because the alternative treatment would not have produced a better result, or because the chain of events from the breach to the harm cannot be proven on a balance of probabilities. Two recent Ontario decisions in which causation defeated otherwise strong cases on standard of care are Knight v Lawson and Johnson v Lakeridge Health.
The third element, damages, also defeats some cases. Where the breach has caused only psychological upset that does not rise to the level of a recognized mental injury, and no physical harm, a claim will not succeed even where the breach is admitted. The Court of Appeal made this point clearly in Bothwell v London Health Sciences Centre.
Even where all three elements are present, a claim may not be economically viable
Medical malpractice litigation in Ontario is unusually expensive. The reasons are structural:
- Specialized expert evidence is required for every element of the claim, and qualified medical experts charge substantial fees for chart review, written reports, and trial testimony. Expert costs of one hundred thousand dollars or more by the time of trial are routine in complex cases.
- Defendant physicians are represented by the Canadian Medical Protective Association, a well-funded mutual defence organization that vigorously contests claims and has no settlement mandate where a defence can be mounted.
- The settlement rate in medical malpractice claims is much lower than in civil litigation generally. Approximately ninety-nine percent of civil lawsuits settle. In my experience and in the broader practice, the figure for medical malpractice is closer to thirty percent. The balance go to trial or are abandoned.
The practical result is that even genuine cases are sometimes declined by experienced counsel, not because the merits are unclear but because the damages are not large enough to justify the cost of litigation. Where damages are modest and the litigation is likely to cost hundreds of thousands of dollars in disbursements alone, the math sometimes does not work.
This is one of the harder conversations I have with prospective clients. Plaintiffs of advanced age, with limited income loss and modest cost-of-care implications, can sometimes have valid claims that no contingency-fee firm can afford to take. The system has gaps, and this is one of them.
You may already be on a limitation clock
Medical malpractice claims in Ontario are subject to limitation periods under the Limitations Act, 2002. The basic rule is two years from the date the claim was, or ought to have been, discovered. There is also an ultimate limitation period of fifteen years from the act giving rise to the claim. For minors, the limitation clock generally does not run until the child turns eighteen.
The discoverability rule is critical. In medical cases, the patient often does not know at the time of the care that something has gone wrong. The two-year clock starts when the patient knew, or reasonably should have known, the material facts on which to base a claim. In practice, that is often when the worse outcome becomes apparent and the patient learns that an earlier intervention, or a different one, might have avoided it.
Discoverability has limits. It does not extend the period indefinitely, and once a reasonable patient would have started asking questions, the clock starts. If you suspect that something has gone wrong with medical care, the prudent approach is to assume the clock is running and act accordingly.
For more on the practical work of gathering records, which the limitations analysis depends on, see How to Get Your Medical Records in Ontario.
A regulatory complaint is not a substitute for a civil claim
If your goal is financial compensation, a complaint to the College of Physicians and Surgeons of Ontario, the College of Nurses of Ontario, or another regulator is not an alternative path to that goal. The regulatory colleges deal with professional conduct and competence; they do not order compensation for harm. A regulatory complaint also does not pause or extend the limitation period for a civil claim.
That said, regulatory complaints have their own value, particularly for patient safety, and many patients pursue them in addition to, or instead of, civil litigation. For a practical overview of the various regulatory routes, see A Patient’s Guide to Making Complaints About Health Care in Ontario. For the specific case of complaints to the CPSO, see Should I File a CPSO Complaint Against My Doctor?.
What to do if you think you have a claim
The single most useful thing you can do, if you are considering a malpractice claim, is to obtain a complete copy of the medical records as soon as possible. Without the records, no lawyer can give you a meaningful assessment of whether the care met the standard, whether any breach caused the harm, and whether the resulting damages are sufficient to support the litigation. With the records, the question becomes assessable.
For the practical mechanics of obtaining records under PHIPA, including the OHIP Personal Claims History tool that is useful for assembling a complete picture of who you saw and when, see How to Get Your Medical Records in Ontario.
Once you have the records, a consultation with an experienced medical malpractice lawyer is the most reliable way to find out whether you have a claim. The first conversation is free and strictly confidential. The earlier we look at the records, the better.
