Medical malpractice is almost always addressed through civil litigation and professional regulatory discipline. The civil framework provides compensation to injured patients and their families where the standard of care has been breached and the breach has caused harm. The regulatory framework, operating through bodies like the College of Physicians and Surgeons of Ontario and the College of Nurses of Ontario, addresses professional accountability through cautions, suspensions, conditions on practice, and (in serious cases) revocation. In rare and exceptional circumstances, however, surgical or perioperative errors can give rise to criminal liability under the Criminal Code. These cases are important not because they are common (in Canada they are vanishingly rare), but because they illustrate the outer boundary between negligence and conduct that the criminal law considers sufficiently serious to warrant criminal sanction.
This post is a foundational reference for understanding that boundary. The framework presented here is the framework of Canadian criminal law, which is the framework that applies to physicians practising in Ontario and across Canada. The post includes brief reference to United States cases for illustrative purposes only. US criminal law operates on different doctrinal frameworks (with significant variation across the 50 states) and the US cases discussed in this post have no binding force in Canada. The US discussion is included because the volume of US prosecutions creates a larger evidence base for understanding the patterns of fact that prosecutors and courts tend to find sufficient to warrant criminal sanction, and because the US patterns can illuminate by comparison the framework of restraint that Canadian courts and prosecutors apply.
In two decades of medical malpractice practice, I can count on one hand the number of times the question of criminal liability has been a serious consideration in any of the cases I have evaluated. The framework is calibrated to keep the criminal law as the last resort, applied only where the conduct goes substantially beyond what the civil and regulatory frameworks adequately address. Understanding the framework matters, however, because it affects how families and physicians think about the most serious cases and because it occasionally enters the public discussion when a particularly egregious case is reported.
The Canadian framework — criminal negligence and the marked and substantial departure standard
A brief overview of the Canadian framework is useful for the analysis.
The Criminal Code framework. Criminal liability for medical conduct in Canada operates principally under the criminal negligence framework in the Criminal Code:
- Section 219 defines criminal negligence as showing wanton or reckless disregard for the lives or safety of others by an act or omission where the person has a duty to act
- Section 220 addresses criminal negligence causing death
- Section 221 addresses criminal negligence causing bodily harm
The framework treats criminal negligence as a separate offence from manslaughter and from ordinary criminal liability. The framework operates with its own structure of mens rea, actus reus, and required severity of conduct.
The “marked and substantial departure” standard. The Supreme Court of Canada has articulated the framework for criminal negligence in a series of decisions including R v Tutton, [1989] 1 SCR 1392, R v Beatty, 2008 SCC 5, and R v JF, 2008 SCC 60. The framework requires that the conduct constitute a marked and substantial departure from the conduct of a reasonably prudent person in the circumstances. The framework operates with two components:
- The conduct must depart from the standard of care expected of a reasonable person
- The departure must be marked and substantial, not merely a minor deviation
The framework distinguishes criminal negligence from civil negligence by the severity of the departure required. Civil negligence is established where the conduct falls below the standard of care; criminal negligence requires that the conduct fall substantially and markedly below that standard. The framework reflects the principle that criminal sanction is reserved for the most serious conduct.
The mens rea framework. Canadian criminal negligence operates on an objective foresight standard. The framework asks whether a reasonable person in the accused’s position would have foreseen the risk of harm from the conduct. The framework does not require subjective awareness of the risk; it asks whether the risk was reasonably foreseeable. The objective foresight standard is calibrated through the framework of the marked and substantial departure: only where the conduct is sufficiently extreme that a reasonable person would have foreseen the risk and refrained does the framework support criminal liability.
The medical context. In the medical context, the framework operates with particular care. Medicine is a profession that requires clinical judgment under conditions of uncertainty. The framework recognizes that clinical decisions made in real time, under pressure, with incomplete information, are inherent to the practice of medicine. The framework does not criminalize clinical judgment errors. The criminal law is reserved for conduct that goes well beyond clinical judgment, into the territory of recklessness or substantial disregard for basic safety obligations.
The framework’s evolution. The framework has been refined through case law over many decades. The Supreme Court of Canada’s decision in R v Roy, 2012 SCC 26 (which addressed dangerous driving causing death, applying the same marked and substantial departure framework) consolidated the framework and emphasized that the criminal law does not punish conduct that falls within the range of human error, even where the consequences are tragic.
Why criminal prosecutions of medical conduct are rare in Canada
Several structural reasons explain the rarity of criminal prosecutions of medical conduct in Canada.
The framework treats medicine as a profession requiring judgment. The framework recognizes that medicine involves clinical reasoning under uncertainty. The framework does not lightly criminalize the exercise of clinical judgment, even where the judgment turns out to have been incorrect in hindsight.
The civil framework provides effective accountability. Where a patient has been harmed by a breach of the standard of care, the civil framework provides a route to compensation and a public accountability function (through reported decisions). The framework recognizes that the civil regime addresses the substantive concerns in the great majority of cases.
The regulatory framework provides protective response. Where the conduct raises concerns about the physician’s continued capacity to practise, the regulatory framework provides cautions, suspensions, conditions, and (in serious cases) revocation. The framework recognizes that the regulatory regime addresses the protective function effectively.
The marked and substantial departure threshold is high. The criminal framework requires that the conduct fall well outside the range of what reasonable clinical practice would tolerate. The framework is calibrated to exclude clinical errors, isolated lapses, and even some patterns of substandard care that warrant civil liability and regulatory discipline.
Prosecutorial discretion supports the framework. Crown prosecutors operate with discretion about which cases to charge and prosecute. The framework supports declining prosecution where the conduct, however serious in civil or regulatory terms, falls within the framework of recognized clinical activity and does not meet the marked and substantial departure threshold.
Published data confirms the rarity. A review published in the Canadian Medical Association Journal documented that over a span of approximately 25 years, only a handful of Canadian healthcare providers faced charges of criminal negligence causing death, with very few resulting in conviction. The framework operates as a meaningful filter against criminalization of medical conduct.
The Canadian record — historical and recent
A small number of cases illustrate the pattern of fact that has supported criminal charges or convictions in Canada.
Historical example: anesthesia abandonment. A historical case from Saskatchewan involved an anesthetist who was convicted of criminal negligence causing bodily harm after a patient suffered catastrophic brain injury when the oxygen supply was interrupted while the physician was absent from the operating room. The framework was satisfied not by a technical clinical error but by a fundamental breakdown in basic patient monitoring and safety. The pattern of fact (abandoning a patient during anesthesia; failing to maintain monitoring; ignoring the foundational safety framework that anesthesia practice requires) was qualitatively different from a clinical judgment error.
This case has been the subject of detailed analysis in the academic literature on the medical-legal interface in Canada. The framework illustrated by the case is the framework’s typical application: criminal liability arising not from a technical error in clinical practice but from a profound failure of the basic safety framework that the practice requires.
Recent example: acquittal after manslaughter charge. More recently, criminal charges were laid in Quebec against an anesthesiologist following the death of a patient after surgery. The physician was ultimately acquitted on all charges. The acquittal is illustrative of the framework’s operation: even where the criminal process is engaged, the marked and substantial departure standard operates as a meaningful protective threshold. Acquittal where the conduct falls within the framework of recognized clinical activity is consistent with the framework’s principles.
The Canadian experience suggests that criminal liability is most likely to arise not from a technical surgical error but from a profound failure of basic safety obligations. The recurring patterns include:
- Abandoning a patient during a critical phase of care
- Failing to maintain monitoring of vital signs
- Ignoring obvious clinical risks
- A complete breakdown in foundational safety practices
These patterns sit qualitatively apart from the framework of clinical practice that the civil and regulatory regimes typically address.
The United States — a different framework, useful for comparison
The framework in the United States operates differently. US criminal law is a matter of state law in most respects, with substantial variation across the 50 states in the specific standards and the patterns of prosecution. The US discussion in this post is included only as comparative material; the US framework has no binding force in Canada, and Canadian readers should focus on the Canadian framework articulated above.
The US has seen a greater number of criminal prosecutions arising from surgical care than Canada, though these cases remain rare relative to the volume of US medical malpractice litigation. The patterns that have given rise to criminal charges in the US illuminate by comparison the framework of restraint that Canadian prosecutors and courts apply.
The Duntsch case. Perhaps the most well-known US case is that of a Texas neurosurgeon convicted in 2017 of intentionally injuring a patient and sentenced to life imprisonment after a series of catastrophic surgical outcomes across multiple patients. The prosecution framed the case not as mere incompetence but as conduct that knowingly placed patients at extreme risk of harm. The case is notable in the comparative analysis because the prosecution charged and proved an intentional offence rather than negligence-based liability, reflecting the prosecution’s view that the conduct went beyond what negligence frameworks would adequately address. The fact pattern (multiple patients catastrophically harmed across a short period; documented warnings about the surgeon’s practice that were not acted upon; clinical decisions that were qualitatively outside the range of recognized clinical reasoning) was qualitatively extreme even by the standards of criminal medical prosecutions.
The pattern of US cosmetic surgery cases. US prosecutors have brought criminal charges in several cases arising from cosmetic surgery procedures performed in non-accredited facilities with inadequate monitoring equipment, without appropriate anesthesia personnel, and with patient outcomes including death. In one California case, a cosmetic surgeon was convicted of involuntary manslaughter following a patient’s death during a liposuction procedure. The appellate framework upheld the conviction, pointing to multiple systemic safety failures. The pattern of fact (procedure performed in a setting lacking the safety framework of an accredited facility; absence of appropriate monitoring; absence of appropriate anesthesia personnel; foreseeable risk to the patient that was not addressed) reflected the framework that US prosecutors and courts have applied to support criminal charges.
The pattern of delayed emergency response. In a more recent case from Colorado, a plastic surgeon was convicted of attempted reckless manslaughter after failing to call emergency services for hours when a patient went into cardiac arrest during surgery. The pattern of fact (the patient required emergency intervention; the framework of emergency response was not engaged; the delay was substantial and unjustified by any clinical reasoning) reflected the framework’s typical pattern.
The pattern of wrong-site or wrong-organ surgery. There are also ongoing prosecutions in the US arising from wrong-site or wrong-organ surgery. A surgeon in Florida has been charged with manslaughter following the death of a patient after allegedly removing the wrong organ during surgery. The pattern of fact (a foundational surgical safety framework, the universal protocol for site marking and patient identification, was apparently not engaged; the consequence was catastrophic) reflects the framework that US prosecutors have considered sufficient to support criminal charges.
What these cases have in common
Across jurisdictions, the fact patterns that give rise to criminal liability tend to share common features. Whether the framework is Canadian (marked and substantial departure under the Criminal Code) or US (varying state-by-state standards), the patterns that prosecutors and courts have considered sufficient for criminal sanction share several characteristics:
A complete breakdown in basic patient safety practices. The framework that criminal sanction addresses is not technical error in clinical practice. It is breakdown of the basic safety framework that clinical practice requires. The framework distinguishes between a clinical judgment that turns out to be incorrect (which the civil and regulatory regimes typically address) and a failure to engage with the basic safety framework at all.
Conduct that is reckless or shows disregard for obvious risks. The framework requires more than negligence. The conduct must reflect disregard for risks that a reasonable clinician would have appreciated and addressed. The framework treats this disregard as qualitatively different from clinical error.
Failure to respond appropriately to a life-threatening complication. Several of the cases discussed above involve a failure to engage with the emergency response framework when a critical clinical situation arose. The framework treats the failure to engage with the emergency framework as qualitatively different from clinical error in the emergency response itself.
Systemic deficiencies that go far beyond a single error. The framework is typically engaged where the conduct reflects a pattern of disregard for the safety framework, not an isolated incident. The framework recognizes that even profound clinical errors arising from genuine clinical reasoning are different in kind from conduct that reflects systematic disregard for foundational safety practices.
Settings that lack the framework of accredited clinical practice. Several US cases involve procedures performed in settings that lacked the safety framework of accredited clinical facilities. The framework treats the choice to perform high-risk procedures in inadequately resourced settings as a meaningful factor in the criminal analysis.
Canadian courts have been careful to distinguish between unfortunate outcomes (even those caused by negligence) and conduct that is so dangerous that it becomes a matter of public safety and criminal law. The framework operates to preserve the criminal law as the last resort.
The interface with civil malpractice and regulatory discipline
For Ontario patients and families, the framework of criminal liability for medical conduct interacts with the parallel frameworks of civil malpractice and regulatory discipline in several important ways.
Most cases proceed only through civil and regulatory frameworks. The framework for criminal liability is reserved for the most serious cases. The framework for civil malpractice addresses the great majority of cases where patients have been harmed by substandard care, providing compensation and a public accountability function. The framework for regulatory discipline addresses the professional accountability dimension through cautions, conditions, suspensions, and revocation. For more on the civil framework, see Suing for Medical Malpractice in Ontario: What You Need to Know. For more on the framework for regulatory complaints, see A Patient’s Guide to Making Complaints About Health Care in Ontario.
The three frameworks can apply in parallel. Where the conduct is sufficiently serious, the same underlying events can give rise to criminal proceedings, civil proceedings, and regulatory discipline. The frameworks operate independently, with different procedural rules, different standards of proof (beyond reasonable doubt for criminal; balance of probabilities for civil and regulatory), and different remedies. Where a criminal conviction is obtained, the framework permits the conviction to be referenced in civil and regulatory proceedings as evidence of the underlying conduct, though the specific weight depends on the framework of the particular proceeding.
Criminal proceedings typically resolve first. Where the same conduct gives rise to both criminal proceedings and regulatory discipline, the framework typically supports the criminal proceedings being resolved first. The framework preserves the accused’s fair trial rights and produces an evidentiary record that can be referenced in subsequent proceedings. A recent example in the broader regulatory case law illustrates the pattern: a regulatory discipline hearing held more than ten years after the underlying conduct because of the timing of criminal proceedings, with the framework treating the criminal conviction as evidence in the subsequent regulatory analysis.
Civil litigation can proceed alongside or after criminal proceedings. The civil framework operates independently of the criminal framework. A civil claim does not require criminal charges to have been laid or to have resulted in conviction. A civil claim can be filed and proceed regardless of the criminal framework’s engagement. Where criminal proceedings result in conviction, the civil framework may reference the conviction, but the civil claim continues to operate on its own framework of standard of care, causation, and damages.
Regulatory accountability does not require criminal liability. The framework for regulatory discipline operates on the substantive content of the conduct against the professional standards framework. The framework does not require criminal proceedings or a criminal conviction. Where the conduct falls below the professional standards, the regulatory framework can produce findings of professional misconduct and impose sanctions regardless of the criminal framework’s involvement.
What this means for patients and families in Ontario
For patients and families in Ontario who have experienced a catastrophic surgical outcome, several practical observations follow from the framework above.
Criminal liability is not the typical route. The framework for criminal liability is reserved for the most extreme cases. The vast majority of catastrophic surgical outcomes do not result in criminal proceedings, even where the underlying care was substandard. The framework that typically addresses these cases is civil litigation and (where appropriate) regulatory discipline.
Civil litigation can produce meaningful outcomes. Where the framework supports a civil claim, the framework can produce compensation for the harm caused and a degree of accountability for the underlying conduct. The framework for evaluating these claims operates on the standard of care, causation, and damages dimensions discussed in the foundational explainer linked above.
Regulatory complaints provide an accountability route. Where the framework supports a regulatory complaint, the regulatory framework can produce findings of professional misconduct and protective sanctions. The framework operates independently of the civil framework and does not require the resources of civil litigation.
Criminal investigation typically follows the most extreme cases. Where conduct rises to the level of the marked and substantial departure standard, the framework for criminal investigation may be engaged. The framework typically arises through the Office of the Chief Coroner, hospital reporting frameworks, or police investigation arising from specific reports. The decision to investigate and charge is within Crown discretion.
Patient families have a right to pursue all available frameworks. The framework of accountability for the most serious cases can include civil litigation, regulatory complaint, and (where appropriate) criminal investigation. The frameworks operate independently and the engagement of one does not preclude the others.
Conclusion
Criminal prosecution of surgical error remains the exception, not the rule. In Canada in particular, it is extraordinarily rare. The framework reflects the principle that the criminal law is the last resort, applied only where the conduct goes substantially beyond what the civil and regulatory frameworks adequately address.
This framework is calibrated to keep medicine functioning as a profession. The framework requires clinicians to make decisions under uncertainty, sometimes with incomplete information, sometimes under pressure, sometimes with outcomes that are tragic regardless of the decisions made. The criminal law’s restraint reflects the framework’s understanding that criminalizing clinical judgment errors would undermine the practice of medicine itself.
Where conduct crosses the line from negligence into recklessness or a marked and substantial departure from basic safety standards, however, the consequences may extend beyond civil liability and regulatory discipline. The framework recognizes that some conduct is qualitatively different from clinical error and that the criminal law is reserved for that category of conduct.
For families considering a catastrophic surgical outcome, the framework most likely to be relevant is the civil framework, often accompanied by a regulatory complaint. The criminal framework, while important to understand, is engaged only in the most extreme cases. The framework for evaluating which routes are appropriate for a particular case depends on the specific facts, the nature of the underlying conduct, and the protective considerations going forward.
