What counts as medical negligence in the UK?
Short answerFor a UK clinical negligence claim to succeed, the patient must show two things: that the care received fell below the standard of a reasonably competent practitioner in that field (breach of duty), and that this failing caused harm they would not otherwise have suffered (causation). The categories below are the most commonly seen in practice.
Misdiagnosis & delayed diagnosis
When a condition is missed, identified incorrectly, or diagnosed too late, treatment is delayed and outcomes worsen. Common examples include missed cancer diagnoses, undiagnosed sepsis, missed strokes and heart attacks, and delayed identification of meningitis. The harm often lies not in the original illness, but in the lost opportunity to treat it earlier.
Surgical errors
Surgical negligence covers mistakes made before, during or after an operation. This can include operating on the wrong site, retained surgical instruments or swabs, nerve or organ damage from avoidable error, anaesthetic mistakes, and inadequate post-operative monitoring leading to preventable infection or bleeding.
Birth injuries & maternity negligence
Maternity claims are among the most serious. They include cerebral palsy caused by oxygen deprivation, Erb's palsy from shoulder dystocia mismanagement, fourth-degree tears that go unrepaired, undiagnosed pre-eclampsia, and stillbirth where appropriate monitoring would have changed the outcome.
Medication & prescription errors
Errors include prescribing the wrong drug or dose, failing to check for allergies or interactions, dispensing mistakes by pharmacists, and continuing medication that should have been reviewed. Even small dosing errors can cause serious harm, particularly with anticoagulants, insulin and chemotherapy.
GP negligence
General Practitioners are usually the first point of contact. Negligence can arise from failure to refer for specialist investigation, missed red-flag symptoms, inadequate examination, or incorrect medication advice — including in telephone and online consultations.
A&E and hospital negligence
Emergency departments are high-pressure environments, but errors in triage, missed fractures on X-rays, failure to admit a deteriorating patient, or premature discharge can all amount to negligence when the standard of care falls below what is reasonably expected.
Dental negligence
Dental claims include misdiagnosed gum disease and oral cancer, nerve damage during extractions, poorly placed implants, incorrect orthodontic treatment, and failure to obtain proper informed consent before invasive procedures.
Cosmetic surgery negligence
Cosmetic procedures — surgical and non-surgical — must still meet a recognised standard of care. Claims arise from botched surgery, inadequate aftercare, scarring, infection, and failure to warn of realistic risks before treatment.
Care home & nursing negligence
Pressure sores, falls from inadequate risk assessment, malnutrition, dehydration, and medication errors in residential or nursing care can all give rise to claims, particularly where a duty of care to a vulnerable adult has been breached.
Mental health negligence
Failures in mental health care include inadequate suicide risk assessment, premature discharge of detained patients, and failure to follow safeguarding procedures under the Mental Health Act 1983.
Frequently asked questions
What is the most common type of medical negligence in the UK?
Misdiagnosis and delayed diagnosis are consistently among the most common categories — particularly missed cancer, undiagnosed sepsis, missed strokes and delayed identification of meningitis. The harm is usually caused by the lost opportunity to treat the condition earlier.
Is failing to obtain informed consent a type of negligence?
Yes. Following Montgomery v Lanarkshire Health Board (2015), failing to warn a patient of material risks or reasonable alternatives to a proposed treatment can amount to negligence even where the procedure itself was performed competently.
Can I claim if a private clinic, not the NHS, was negligent?
Yes. The same legal tests for breach of duty and causation apply to private healthcare providers, including private hospitals, dentists, and cosmetic clinics. Claims are usually defended by the provider's medical defence insurer rather than NHS Resolution.