Delayed Diagnosis Claims

If a delay in diagnosing your condition allowed an illness to progress and caused avoidable harm, and you need clear legal advice, our solicitors, with over 22 years of experience in clinical negligence claims in England and Wales, can help.

Last reviewed: July 2026

A delayed diagnosis claim compensates a patient for harm caused when a GP, hospital doctor or specialist failed to identify a condition within a reasonable time, allowing it to worsen. In England and Wales, the claim depends on proving both that the delay fell below the standard expected of a responsible clinician and that earlier diagnosis would, on the balance of probabilities, have led to a materially better outcome. Delayed diagnosis affects conditions ranging from fractures and infections to strokes, sepsis and cancer, and the consequences can range from prolonged pain to permanent disability or death. We understand how unsettling it is to learn that a delay, rather than the illness itself, caused the harm you or your family are now living with.

Law Lane Solicitors advises clients and their families in clinical and medical negligence claims from our offices in Stratford, High Holborn, and Croydon. Founded in 2015, we are regulated by the Solicitors Regulation Authority and hold a Law Society of England and Wales accreditation in Personal Injury. Our commitment to getting the best results for our clients is evidenced by our average of 4.95 out of 5 based on over 1,200 reviews.

What does our delayed diagnosis service cover?

Delayed diagnosis claims arise across primary and secondary care, wherever symptoms are misread, tests are not arranged, or results are not acted upon. Our team advises and acts on the following matters:

Delayed sepsis diagnosis claims, where a failure to recognise and treat sepsis promptly caused organ damage, amputation or death.
Delayed stroke diagnosis claims, where a failure to identify stroke symptoms in time prevented access to thrombolysis or thrombectomy within the treatment window.
Delayed fracture and orthopaedic diagnosis claims, including missed fractures on X-ray leading to malunion or long-term disability.
Delayed infection diagnosis claims, where a failure to identify and treat an infection allowed it to spread, causing sepsis or permanent organ damage.
Delayed diagnosis of cardiac conditions, including missed heart attacks and undiagnosed cardiac disease leading to avoidable deterioration.
Failure to refer claims, where a GP or hospital clinician did not refer a patient to a specialist within a timeframe that current guidance required.
Claims arising from delayed or misread test results, including blood tests, scans and biopsies that were not reviewed or communicated in time.

Why choose Law Lane for delayed diagnosis claims?

Our Medical Negligence Solicitors specialise in highly complex compensation claims. Proving a delayed diagnosis claim means showing both that a reasonably competent clinician would have diagnosed the condition sooner and that earlier diagnosis would have changed the outcome. A clinician is not negligent if the care given accorded with practice accepted as proper by a responsible body of medical opinion, so the first stage of the claim requires expert evidence establishing that the delay fell outside that standard. Our team includes a former GP and former nurse acting as in-house medical consultants, bringing direct clinical knowledge to the assessment and management of claims. This dual medical/legal expertise means we can spend more time evaluating the merits of a medical negligence case and take on highly complex matters that other law firms often must refuse due to lack of in-house expertise.

Get in touch

Our clinical negligence team is ready to advise you and your family on your claim today. We understand the shock and distress a misdiagnosis can cause, and we act with the urgency and sensitivity that these cases deserve. Please contact us on 020 7870 4870 or email: clinicalnegligence@lawlanesolicitors.co.uk. You can also attend our free, no-obligation 30 minute consultation, held every Thursday between 11am and 1pm.

Law Lane Solicitors is proud to be accredited under The Law Society’s Immigration and Asylum Accreditation.

Got any questions?

* Required

"*" indicates required fields

Frequently Asked Questions – Delayed Diagnosis Claims

What is a delayed diagnosis claim?

A delayed diagnosis claim is a clinical negligence claim brought where a clinician failed to identify a condition within the timeframe that a responsible body of medical opinion would consider reasonable, and that delay caused avoidable harm. The claim requires evidence that the delay was itself negligent and that earlier diagnosis would have led to a better outcome. Both elements must be established, since a delay that made no difference to the outcome does not give rise to compensation.

How do I prove earlier diagnosis would have made a difference?

Proving that earlier diagnosis would have made a difference requires expert medical evidence addressing what treatment would have been available at the earlier point and what outcome that treatment would likely have achieved. This is known as causation, and it is often the most contested part of a delayed diagnosis claim. We instruct experts in the relevant specialty to address this question directly, using your full medical records.

Can I claim if the delay led to a permanent disability?

Yes, compensation for a delayed diagnosis claim covers permanent disability resulting from the delay, including future care costs, loss of earnings and the cost of any equipment or adaptations you now need. General damages are also payable for pain, suffering and loss of amenity. We work with medical and financial experts to quantify these losses fully.

What if the delay happened at my GP surgery rather than in hospital?

A delayed diagnosis claim can be brought against a GP practice in the same way as against a hospital, since GPs owe the same duty of care to diagnose and refer patients appropriately. Many delayed diagnosis cases in fact arise from primary care, where symptoms were not investigated or a referral was not made promptly. We assess claims against GPs, hospitals, and combinations of both where more than one clinician contributed to the delay.

Can I Make a Claim for Someone Who Has Died?

If your loved one has died due to a late or incorrect diagnosis, you may be able to make a Fatal Medical Negligence Claim. We know how distressing these types of cases are and will leave no stone unturned to get answers and justice for you and your family.

How much does an initial consultation cost?

We offer a fixed-fee initial consultation for delayed diagnosis matters. At that meeting, we review your medical history, advise on the legal basis of a potential claim, and explain funding options including conditional fee agreements.

You can also attend our free, no-obligation 30 minute consultation, held every Thursday between 11am and 1pm. Please contact us on 020 7870 4870 or email clinicalnegligence@lawlanesolicitors.co.uk to arrange this.