The Medico-Legal Duties of a Surgeon: A Global Overview

Most surgeons learn medico-legal practice by absorption: a consent form here, a coroner's letter there, a colleague's story about a complaint. The result is a patchwork in which several different systems get compressed into one vague sense of legal jeopardy. The medico-legal duties of a surgeon are easier to meet once you can see which system is asking the question. A civil claim, a regulatory referral, a coroner's inquest and an employer's investigation follow different rules, apply different standards of proof, and can reach opposite conclusions about the same operation. This overview maps the four systems, the tests each applies, where jurisdictions diverge and what trainees in particular owe. The underlying law is summarised in the topic page on medicolegal principles and negligence.

Why orthopaedics carries more of this than most specialties

The numbers are concrete. In NHS Resolution's annual report and accounts for 2024/25 (opens in a new tab), orthopaedic surgery accounted for 11.5% of the 11,512 clinical claims received (excluding general practice indemnity), behind emergency medicine at 13.9%. By value it accounted for 3.9% of the £6.7 billion of claims received, because obstetric claims dominate cost. NHS Resolution paid out £3.1 billion in compensation that year across its schemes.

An analysis of NHS Resolution data from 1996/97 to 2023/24 by Gill and colleagues (opens in a new tab) found 22,606 orthopaedic claims, of which 14,702 settled for more than £2.2 billion in total. Surgical errors, failure or delay in treatment, and decision-making errors were the leading primary causes. The authors pointed to better consent and multidisciplinary decision-making as the main opportunities to reduce claims.

Four systems, not one

These do not track each other. A surgeon can be cleared by a regulator and still lose a civil claim, because the claim asks whether care on one occasion fell below a reasonable standard, while the regulator asks whether the surgeon is currently fit to practise. A coroner can make critical findings where no claim is ever brought. An employer can exclude a surgeon during an investigation that later exonerates them. Treating a good outcome in one channel as protection in another is a common and expensive mistake. The regulatory process is set out in fitness to practise processes and the inquest in the coroner's inquest for surgeons.

The negligence framework

Civil claims across the common-law world are built from four elements: a duty of care, a breach of that duty, causation linking the breach to harm, and damage the law recognises. Duty is rarely contested; it arises once a clinical relationship exists. The fights are over breach and causation.

Breach: the standard of care for treatment

For diagnosis and treatment, the traditional test asks whether the surgeon acted in accordance with a practice accepted as proper by a responsible body of practitioners in that field: Bolam v Friern Hospital Management Committee [1957] 1 WLR 582. Where genuine professional disagreement exists, following either school is not negligent. Bolitho v City and Hackney Health Authority [1998] AC 232 added that the body of opinion must itself withstand logical analysis, so "some surgeons do it this way" is a defence only if the reasoning holds up. In practice courts rarely reject expert opinion on this ground.

Australia put a similar rule into statute. Section 5O of the New South Wales Civil Liability Act 2002 (opens in a new tab) protects a professional who acted in a manner widely accepted in Australia by peer professional opinion as competent practice, unless the court considers that opinion irrational. Other states have equivalent provisions.

Breach: information is different

The most important change in modern medico-legal practice is that the standard for giving information is no longer set by the profession. It is set by reference to the patient.

The High Court of Australia got there first in Rogers v Whitaker (1992) 175 CLR 479. An ophthalmologist did not warn of a risk of sympathetic ophthalmia, about 1 in 14,000; the patient developed it and lost the sight of her good eye. The Court held that a doctor must warn of any material risk: one a reasonable person in the patient's position would attach significance to, or one the doctor knows or should know this patient would. Section 5P of the NSW Act keeps the duty to warn outside the peer-opinion defence.

The UK Supreme Court adopted the same test in Montgomery v Lanarkshire Health Board [2015] UKSC 11 (opens in a new tab), holding that the doctor must take reasonable care to ensure the patient is aware of material risks and of any reasonable alternative or variant treatments. The Court said materiality "cannot be reduced to percentages".

Two consequences are most often missed:

• A percentage is not a defence. Quoting a low incidence does not discharge the duty if the consequence would matter greatly to this patient. A 1% risk to fine motor function means something different to a violinist.
• Alternatives are part of the duty, including doing nothing. Failing to mention non-operative management, or a different implant or approach a reasonable patient would want to weigh, is a breach in its own right even if the operation was flawless.

The full comparison, and what a defensible consent conversation looks like, is in informed consent after Montgomery.

Causation

Causation is where many claims are won and lost. The default is the "but for" test: would the harm have occurred but for the breach? In consent cases this becomes a question about what the patient would have done if properly warned, which courts answer partly objectively to avoid pure hindsight. Canada's Reibl v Hughes [1980] 2 SCR 880 framed this as a modified objective test: what a reasonable person in the patient's particular position would have decided.

Where several causes contribute, some jurisdictions allow claims on a material-contribution basis rather than strict but-for proof. This matters in orthopaedics, where delayed-diagnosis cases often involve an evolving pathology and an argument about how much of the final deficit was avoidable.

How jurisdictions differ

The direction of travel is the same everywhere, away from professional paternalism and towards patient-centred disclosure, but the mechanics differ.

The United States is the outlier because there is no single national answer. A surgeon licensed in more than one state may be held to different standards in each, so establish the position in your state rather than assume it.

Accurate as of October 2026. Case law and statute change; confirm the current position in your jurisdiction before relying on it.

Duties that bind regardless of litigation

Professional standards. In the UK, the GMC's Good medical practice (the current edition came into effect on 30 January 2024) is the standard a fitness-to-practise panel measures you against. It is not law, but it is what the regulator will quote. Other regulators publish equivalents; know yours.

Candour after harm. Regulators now impose a professional duty to tell patients when something has gone wrong, apologise and explain what happens next. In England the organisation also has a statutory duty: regulation 20 (opens in a new tab) of the Health and Social Care Act 2008 (Regulated Activities) Regulations 2014 requires registered providers to notify the relevant person of a notifiable safety incident as soon as reasonably practicable, in person, and to provide reasonable support. Apologising is not an admission: section 2 of the Compensation Act 2006 (opens in a new tab) says an apology "shall not of itself amount to an admission of negligence or breach of statutory duty". The mechanics are in duty of candour explained.

Records. The clinical record is the primary evidence in all four systems, often years later when nobody remembers the case. A contemporaneous note of what was discussed, what alternatives were offered and what the patient said mattered to them is worth more than any later recollection. See defensible clinical documentation.

Indemnity. UK law requires doctors to have adequate and appropriate indemnity, and since 2015 the GMC can check it and refuse or remove a licence without it. NHS schemes indemnify NHS bodies for clinical negligence claims, but the GMC's guidance on insurance and indemnity (opens in a new tab) notes they do not give individual advice for criminal, disciplinary or fitness-to-practise matters, and do not cover private work. That gap is why defence-body membership matters even for salaried trainees. Cover options are compared in choosing medical indemnity cover.

What trainees owe

Trainees are held to the standard of the post they hold, and the habits formed in training are the ones that protect a consultant later.

Work within your competence and say when you have reached its edge. Knowing the limits of your training and calling for help when a case moves beyond them is a professional duty, not a weakness. Record that you sought senior advice, from whom, at what time, and what you were told. A note that reads "discussed with Mr X, on call consultant, 02:10; advised CT and review at 08:00" protects the patient and you.

Do not take consent you cannot answer for. The Royal College of Surgeons of England's consent guide (opens in a new tab) expects the person consenting to be trained and qualified to provide the treatment and to know its risks and alternatives. If you are asked to consent for an operation you cannot discuss, say so.

Hand over in a structure that leaves no ambiguity. Many adverse events trace back to a missed message rather than a technical error. Hand over face to face or in a structured written format, name the outstanding tasks and who owns them, and listen when nurses, physiotherapists or anaesthetists raise a concern.

Know who to call before you need them. Learn the out-of-hours route to the on-call consultant, the trust's legal or patient-safety team, and your defence organisation's advice line. Ask early rather than hope a problem resolves.

What to do when something goes wrong

The sequence matters, and the instinct to fix things privately is the wrong one.

1. Look after the patient first. Clinical stabilisation precedes everything.
2. Tell the patient. Early, plainly, in person, with an apology for what has happened. Do not speculate about cause before you know it.
3. Write a contemporaneous note. Facts, times, who was present, what was said. Never alter an earlier entry; add a dated, timed addendum. Altered records turn a defensible case into an indefensible one.
4. Report through the incident system. See incident reporting systems explained.
5. Contact your indemnity provider early, before writing any statement or attending any interview.
6. Do not investigate it alone. Formal analysis belongs in root cause analysis, designed to find system causes rather than an individual to blame.

The rest of this series

• Informed consent after Montgomery: how the standards compare, and the consent conversation
• Capacity and best-interests decisions: when a patient cannot decide
• Duty of candour: what it requires and how to do it well
• Never events: wrong site, wrong implant, retained items
• Serving as an expert witness: duties, pitfalls and how to start
• Fitness to practise: what happens after a referral
• Safeguarding: children and vulnerable adults
• The coroner's inquest: giving evidence
• Choosing indemnity cover: occurrence versus claims-made

The summary

Medico-legal risk in orthopaedics concentrates in a few places: consent conversations that were never really conversations, delayed diagnosis where the record cannot show what was considered, communication that stopped when the complication started, and notes written to look good rather than to be accurate. None is a technical surgical problem. All are addressed by habits that cost minutes.

The surgeons who handle this well are not the ones who know the most case law. They talk to patients properly before operating, write down what was said, ask for help at the edge of their competence, and pick up the phone early when something has gone wrong.

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This article describes legal and regulatory frameworks for educational purposes. It is not legal advice. Obligations vary by jurisdiction and change over time; take advice from your indemnity provider or a qualified lawyer on any specific situation.