Most bad outcomes in medicine are not malpractice. That is the first thing every patient should understand, and it is also the hardest thing to accept when you or someone you love has been seriously harmed.
Medicine carries inherent risk. Surgeries have known complications. Diagnoses can be genuinely difficult. Patients respond to treatment in unpredictable ways. None of those things, on their own, mean a doctor or nurse did anything wrong.
Malpractice, in legal terms, requires two specific findings. First, that the care provided fell below the standard a reasonable practitioner would have provided in the circumstances. Second, that this failure actually caused the harm suffered. Both must be proven, almost always through expert evidence, and the bar is set deliberately high.
After more than two decades of investigating these cases across Ontario, certain patterns recur. Below are five signs worth taking seriously. None of them prove malpractice on their own, but in combination they should prompt a conversation with a lawyer.
1. A serious outcome that was not a known, disclosed risk
Before any procedure of consequence, a physician should walk you through the realistic risks. If you suffered a serious complication that was never mentioned, or that the treatment team now describes as “very rare” or “unusual,” the gap between what you were told and what happened is worth examining. The same is true where the consent conversation was rushed, generic, or did not really happen at all.
2. A diagnosis that was missed, delayed, or repeatedly dismissed
Some of the most serious cases I see involve patients whose symptoms were brushed aside on multiple visits before someone finally took them seriously. Cancers, strokes, cardiac events, infections, and ectopic pregnancies are common categories. If you went to your family doctor or the emergency department repeatedly with the same complaint, were sent home each time, and were eventually diagnosed with something that should have been caught earlier, that history matters. See more on misdiagnosis and emergency room delay.
3. A candid concern raised by another treating clinician
Doctors and nurses do not casually criticize each other’s work. When one does, often quietly, often after the fact, it carries real weight. Comments like “this should have been picked up sooner” or “you should not have been discharged” are unusual enough that they should be written down word for word, with the date and the name of the person who said them, and shared with a lawyer.
4. Red flags in the medical records
Sometimes the warning signs are not in what was said to you but in what is missing from the chart. Abnormal test results that were never followed up. A specialist consult that was ordered but never booked. Vital signs trending the wrong way overnight without escalation. A discharge note that does not match what actually happened. Patients rarely see these things, but they are often the spine of a hospital negligence or surgical error case once the records are reviewed by a lawyer and a medical expert.
5. A formal disclosure of harm
Ontario physicians have a professional duty to disclose harm to patients when something has gone wrong. Some take it seriously. If a doctor, hospital, or risk management team has formally told you that an error occurred, an adverse event happened, or a “critical incident review” is underway, that is a meaningful signal. It does not establish liability on its own, and Ontario’s Apology Act, 2009 prevents an apology from being treated as a legal admission, but it tells you the institution itself has identified something worth examining.
What does not necessarily mean malpractice
It is just as important to understand what these signs are not.
A bad outcome that was a properly disclosed risk of treatment is usually not malpractice. A difficult bedside manner is not malpractice. A long wait in a busy emergency department is rarely malpractice on its own. A second opinion that disagrees with the first is not malpractice. A treatment that did not work is not malpractice if the decision to try it was reasonable.
These distinctions matter because pursuing a claim that does not meet the legal test is expensive, exhausting, and almost always unsuccessful. A good medical malpractice lawyer will tell you the truth about your case early, even when the truth is hard to hear.
If you are not sure
If something about your care feels wrong and you cannot quite explain why, the most useful first step is usually to request a complete copy of your medical records. You are entitled to them. A lawyer experienced in medical malpractice can review the records and tell you, often within a single consultation, whether there is something worth investigating further.
For more on the legal process itself, see Suing for Medical Malpractice in Ontario: What You Need to Know. If your concerns are about the conduct of a healthcare provider rather than compensation, A Patient’s Guide to Making Complaints About Health Care in Ontario walks through the regulatory and complaints process.
The first conversation is free and strictly confidential. The earlier we look at the records, the better.
