GP Misdiagnosis Claim UK

What Counts as GP Misdiagnosis in Law

Not every wrong or delayed diagnosis is negligent. Medicine involves judgement, and a GP working with limited information in a ten-minute consultation may reach a reasonable conclusion that later turns out to be wrong. The law only compensates patients where the standard of care fell below what a reasonably competent GP would have provided in the same circumstances.

Typical patterns that lead to a valid GP misdiagnosis claim include:

• Failing to spot red-flag symptoms of cancer (for example persistent rectal bleeding, unexplained weight loss, a breast lump, or a changing mole) and not referring under the two-week-wait pathway
• Missing the signs of sepsis, meningitis, or a heart attack and sending the patient home
• Attributing chest pain, severe headache, or abdominal pain to a benign cause without appropriate examination or investigation
• Not arranging blood tests, imaging, or specialist referral where a reasonable GP would have done so
• Failing to act on abnormal test results or letters returned from hospital
• Misreading obvious clinical signs of a fracture, DVT, pulmonary embolism, or stroke

The claim can be brought against the GP practice (as the GP's employer or partnership) or, where NHS-commissioned care is involved, defended by NHS Resolution on behalf of the practice. If you saw a private GP, the claim is against that private provider and their medical defence organisation.

Proving a Claim: Bolam, Bolitho and Causation

Two hurdles must be cleared. Both are essential; failing either defeats the claim.

Breach of duty. The test comes from Bolam v Friern Hospital Management Committee (1957): a doctor is not negligent if they acted in accordance with a practice accepted as proper by a responsible body of medical opinion. Bolitho v City and Hackney HA (1997) added that the body of opinion must itself withstand logical scrutiny, so a court can reject expert evidence that has no defensible reasoning. In practice, your solicitor instructs an independent GP expert to review the records and give an opinion on whether the care fell below that standard.

Causation. Even where breach is proved, you must show that the breach made a real difference. In misdiagnosis cases this usually means demonstrating what would have happened with a correct or timely diagnosis. Would the cancer have been caught at a curable stage? Would earlier antibiotics have prevented amputation from sepsis? Would timely thrombolysis have avoided the stroke deficit? This second expert opinion, from a specialist in the relevant field (oncology, cardiology, neurology and so on), is often the harder part of the case.

If the harm would have happened anyway, or the delay made no material difference to the outcome, the claim fails on causation even where the GP clearly got it wrong.

What Compensation Covers

Damages fall into two categories.

General damages compensate for pain, suffering and loss of amenity. The Judicial College Guidelines (JCG), updated periodically, set out bracket ranges by injury type and severity. A misdiagnosis claim is valued by reference to the additional harm caused by the delay or error, not the underlying illness itself. For example, if a breast cancer diagnosis was delayed by nine months and that caused the disease to progress from a curable stage to one requiring mastectomy and chemotherapy, the general damages reflect the extra treatment, disfigurement, psychiatric impact and reduced life expectancy attributable to the delay.

Special damages cover measurable financial losses caused by the negligence, including:

• Past and future loss of earnings, and loss of pension
• Cost of private medical treatment, surgery, prosthetics or rehabilitation
• Care and assistance, whether paid or provided by family (valued at a reasonable rate)
• Aids, equipment and home adaptations
• Travel to hospital appointments
• In fatal cases, funeral expenses and dependency claims under the Fatal Accidents Act 1976

Where the injured person needs long-term care, a schedule of loss projects future costs across the rest of their life, often with input from care experts and forensic accountants.

Factors That Affect the Payout

Two claims with the same underlying diagnosis can settle for very different sums. The main variables are:

• Length of the delay: a two-week delay to a cancer diagnosis rarely changes prognosis; a nine-month delay often does
• Stage shift: whether the delay moved the illness from an early, curable stage to advanced or metastatic disease
• Treatment burden: extra surgery, chemotherapy, radiotherapy or amputation caused by the delay
• Prognosis: reduced life expectancy, permanent disability, infertility, or loss of a limb
• Psychiatric injury: a diagnosable condition such as PTSD, depression or adjustment disorder linked to the events
• Age and earnings: a younger claimant with a long working life ahead attracts larger future-loss awards
• Care needs: whether ongoing personal or nursing care is required, and at what level

The GP practice or NHS Resolution may also raise contributory arguments, for example that the patient failed to return when symptoms worsened, though these rarely succeed where the original advice reassured the patient there was nothing to worry about.

Time Limits and Date of Knowledge

The general rule under the Limitation Act 1980 is three years to issue court proceedings. In clinical negligence the clock runs from the later of:

• The date of the negligent act or omission, or
• The claimant's date of knowledge, meaning when they first knew (or reasonably should have known) that the injury was significant and attributable to the treatment received

Date of knowledge matters because patients rarely realise at the time of a missed diagnosis that anything has gone wrong. The three years may only start when the correct diagnosis is finally made and its connection to the earlier consultation becomes apparent.

Two important exceptions:

• Children: the three-year period does not begin until the child's 18th birthday. A parent or litigation friend can start a claim earlier on the child's behalf.
• Lack of mental capacity: limitation does not run while a person lacks capacity within the meaning of the Mental Capacity Act 2005. A litigation friend can bring proceedings on their behalf.

In fatal cases the estate has three years from the date of death, or from the date the personal representatives had the relevant knowledge.

NHS Complaint or Legal Claim?

These are two separate routes and they achieve different things.

An NHS complaint under the NHS complaints procedure is about explanations, apologies and service improvement. You raise it with the practice manager first, and if unresolved you can escalate to the Parliamentary and Health Service Ombudsman. There is no compensation at the end of it, and the timescale is normally 12 months from the event or from when you became aware of it.

A legal claim is about financial compensation for provable harm and loss. It runs alongside, not instead of, a complaint. Many claimants pursue a complaint first to get answers, then instruct a solicitor once they understand what went wrong.

You do not have to complain before you sue, and a complaint response is not a substitute for expert evidence. However, the practice's written response can be a useful document in later litigation, particularly where it admits errors or sets out what should have happened.

How the Claim Is Funded and Run

Most clinical negligence solicitors work under a Conditional Fee Agreement (CFA), commonly called no-win-no-fee. If the case loses, you pay no solicitor fees. If it wins, a success fee (capped by law at 25 per cent of past losses and general damages, excluding future losses) is deducted from the compensation. After-the-event (ATE) insurance is usually taken out to cover the risk of paying the defendant's costs if the claim fails.

The steps are broadly:

1. Free initial assessment and funding agreement
2. Obtaining full GP and hospital records
3. Independent GP expert report on breach of duty
4. Independent specialist report on causation and prognosis
5. Letter of Claim under the Pre-Action Protocol for the Resolution of Clinical Disputes; the defendant has four months to respond
6. Negotiation, mediation or Part 36 offers
7. Court proceedings if liability is denied or the offers are inadequate

The majority of clinical negligence claims settle without a trial, but preparing the case as if it will go to court is what secures a fair settlement.

This page is general information about English law and is not legal advice; speak to a qualified clinical negligence solicitor about your own circumstances.

Frequently asked questions