Duty of care negligence: what it means in a medical negligence claim

Published 13 April 2026

TL;DR

Duty of care negligence refers to the first of three elements a claimant must prove: that the clinician owed them a legal duty of care at the time of the treatment
In medical negligence, duty of care is almost never disputed: it arises automatically from the professional-patient relationship, whether the treatment is NHS or private
Breach of that duty of care is assessed by the Bolam test: the clinician must have acted in a way no responsible body of peers would have endorsed
Rare situations where duty of care negligence is contested include off-duty clinicians, independent contractors, and emergency roadside assistance
Once duty is established, the claimant must still prove breach and causation; all three elements are required for a successful claim

Duty of care negligence is the legal concept at the heart of any negligence claim. Before a court will consider whether a clinician made a mistake, it must first establish that the clinician owed the claimant a legal duty to take reasonable care. In most medical negligence claims, duty of care is straightforward and uncontested. Understanding it matters, however, because knowing why duty exists (and when it might not) helps clarify what a clinical negligence claim is actually about.

What is duty of care in negligence law?

Duty of care in negligence law is the legal obligation owed by one person to another to take reasonable care to avoid causing foreseeable harm. The modern law of negligence in England and Wales derives from Donoghue v Stevenson [1932] AC 562, in which the House of Lords established that a manufacturer owed a duty of care to the ultimate consumer of its product. Lord Atkin's "neighbour principle" (that you must take reasonable care to avoid acts or omissions that you can reasonably foresee would injure your neighbour) remains the foundation of negligence law.

For novel or disputed duty situations, courts apply the Caparo three-part test (Caparo Industries v Dickman [1990] 2 AC 605): the harm was foreseeable; there was sufficient proximity between the parties; and it is fair, just and reasonable to impose a duty.

In a medical negligence context, the Caparo test rarely needs to be applied. The professional-patient relationship creates a recognised duty of care that courts treat as established.

Why duty of care negligence is rarely disputed in medical claims

When a patient attends a GP surgery, presents at an emergency department, or is admitted to hospital, the professional-patient relationship is created at that point. That relationship automatically generates a duty of care. The NHS trust, the GP practice, or the private provider owes the patient a duty to exercise reasonable professional skill and care in providing treatment.

This duty arises regardless of whether the patient pays for treatment privately or receives it through the NHS. It applies to every registered healthcare professional who takes responsibility for the patient's care: doctors, nurses, midwives, physiotherapists, dentists, optometrists, and others.

Because the duty is so well-established, defendants in medical negligence claims almost never argue that no duty of care existed. The dispute is almost always about breach (did the treatment fall below the required standard?) and causation (did the breach cause the harm?). For a full explanation of how the Bolam test determines breach of that duty, see the Bolam test guide.

When is duty of care negligence actually disputed?

There are specific situations where whether a duty of care existed is a genuine legal question:

Off-duty clinicians: a doctor who stops at a road collision and provides emergency assistance is not in the same position as a doctor treating a patient in their professional capacity. The general position is that an off-duty clinician who voluntarily provides assistance owes a duty not to make things worse, but does not owe the full professional duty that applies in a treatment context. The law in this area is not entirely settled.

Independent contractors: a GP who works as an independent contractor to a practice, rather than as an employee, may expose the practice to vicarious liability if the relationship is sufficiently close and the work is an integral part of the practice's business. Whether vicarious liability attaches in a particular case depends on the specific contractual arrangements.

Referral decisions: a clinician who provides advice to another clinician (rather than directly to the patient) may argue that their duty runs to the referring clinician rather than the patient. Courts have generally resisted this argument where the advice foreseeably affects the patient's care.

Emergency telephone triage: NHS 111 and out-of-hours services owe a duty of care to patients who contact them. The precise scope of that duty and the standard it requires continues to be developed by the courts.

Duty of care negligence and the standard of care

Once a duty of care is established, the next question is whether that duty was breached. This is where the Bolam test applies. A clinician who owed a duty of care does not breach it merely because a bad outcome occurred. The clinician breaches their duty only when their conduct fell below the standard that any responsible body of practitioners in the same specialism would have accepted.

The standard of care required by the duty is not perfection. It is the standard of the reasonably competent professional. A GP is judged against the standard of a reasonably competent GP; a consultant neurosurgeon against the standard of a reasonably competent neurosurgeon in that sub-specialism. The duty of care negligence framework does not require any clinician to be the best in their field.

For consent, the standard is different. Following Montgomery v Lanarkshire Health Board [2015] UKSC 11, the duty to inform a patient of material risks before treatment is assessed by a patient-centred standard, not the Bolam test. A clinician can discharge their duty of care on treatment while breaching it on consent.

What happens after duty of care is established?

Establishing duty of care is only the first step. A claimant who proves that a duty existed must then prove:

Breach: the clinician's conduct fell below the Bolam standard. This requires independent expert evidence: a clinician in the same field who confirms that what was done fell outside what any responsible body of peers would have accepted.

Causation: the breach caused the harm claimed. This is assessed under the but-for test: would the harm have occurred even if the clinician had met the required standard? Causation must be proved on the balance of probabilities and is often the most difficult element to establish.

All three elements (duty, breach, and causation) must be proved. Proving duty of care and breach but failing on causation produces no entitlement to compensation. This is one reason why early expert review of all three elements is essential before a claim is pursued.

For a full explanation of medical negligence and the complete proof framework, see the main guide. For how a claim is built in practice, see the how to claim guide. For compensation ranges once all three elements are proved, see the compensation guide. For funding, see the funding guide.

This page provides legal information, not legal advice. If you believe a clinician has breached their duty of care to you, speak to a qualified solicitor who specialises in clinical negligence.