Delayed Diagnosis

Delayed Diagnosis Claims & Compensation

You may be able to claim compensation if a delay in the diagnosis of your medical condition has caused you harm. Our expert lawyers can help you understand your rights.

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  • “Small but very effective and experienced team so every client benefits from the personal touch but also highly skilled litigation know-how. Capability of the team means they can handle all aspects of very complex cases as well as straightforward matters.”

  • “Osbornes Law is an established firm which handles a breadth of complex and high-value clinical negligence matters.”

Delayed Diagnosis Claims

The NHS is under pressure and, unfortunately, this has led to increased waiting times and delays in the diagnosis of serious illnesses like cancer. While guidelines are in place to ensure that suspected serious conditions are investigated promptly, sometimes things go wrong. For patients, finding out that their health outcomes may be worse as a result of a delayed diagnosis can be difficult to come to terms with.

As specialist medical negligence solicitors, we are very experienced in dealing with these types of claims. Our top-ranked team has secured significant compensation for clients who have suffered due to delayed diagnosis, including helping those affected by fast-progressing conditions like cancer, heart disease and pregnancy-related complications.

This page can help you understand:

  • The effects of a late diagnosis and how it can affect your life.
  • If you might be eligible to make a claim for compensation.
  • How we handle claims and gather evidence to support your case.
  • What compensation you could receive and how we determine the amount.

What is a delayed diagnosis?

A delayed diagnosis occurs when you learn that an illness or injury could have been diagnosed earlier, had the proper action been taken by a medical professional. This may mean you are a victim of:

  • Failure to conduct proper tests or investigations
  • Failure to refer you for further testing
  • Delays in receiving test results
  • Misinterpretation of test results
  • Not following up on abnormal results or symptoms
  • Failure to follow medical guidelines or protocols
  • Miscommunication between health professionals
  • Being ‘lost in the system’, where you are not advised of appointments you need to attend

What are the effects of a delayed diagnosis?

Early detection of an illness or injury almost always leads to a better outcome. Taking bowel cancer as an example, prompt diagnosis through screening provides for a survival rate of approximately 98%, compared to only 44% when diagnosed later through referral or emergency presentation. Less-invasive treatments are often available when the diagnosis is made early, and the chances of a full recovery are often higher.

In some cases, delayed diagnosis can lead to serious consequences such as:

  • Needing additional or more risky surgeries
  • Longer hospital stays and rehabilitation
  • Additional healing time and lost income due to lack of work
  • Development of secondary health problems
  • The advancement of cancer from an early stage to a more severe stage, or its spread to other parts of the body
  • Increased risk to life if serious infections such as sepsis or meningitis are not promptly identified and treated
  • Potential for permanent paralysis, for example, in cases where stroke symptoms are not addressed quickly enough.
  • Long-lasting effects on mental health, including conditions such as anxiety, depression, and post-traumatic stress disorder (PTSD).

Every delayed diagnosis can lead to a wide range of consequences, and no two cases are the same. Our lawyers take these claims very seriously. We work hard to help our clients secure the compensation, and answers, they deserve.

Am I eligible to make a delayed diagnosis claim?

Not all cases of delayed diagnosis will lead to a successful compensation claim. To have grounds for a claim, you will need to prove that:

  1. Your doctor or healthcare professional failed in their duty to provide an acceptable standard of medical care.
  2. This breach of duty caused harm or aggravated an existing condition.
  3. That harm could have been avoided had the proper steps been taken.

This may sound straightforward. However, some illnesses are extremely difficult to diagnose and it may not be immediately apparent that a mistake has been made. The tremors associated with Parkinson’s Disease can easily be mistaken as a symptom of old age, for example, and heart attacks can be mistaken for indigestion at their onset.

The test is not whether the medical professional objectively missed the signs of a serious medical condition or injury, but whether they failed to do what a competent healthcare professional would have done when presented with similar symptoms.

To prove this, we review your medical records, independent medical evidence, and the medical protocols that were in place at the time of your treatment, among other evidence.

How much compensation can I expect for a delayed diagnosis claim?

The impact of a delayed diagnosis will vary from person to person. When we handle your case, we will collect all the necessary evidence to ensure you get the full compensation you deserve, including an expert assessment of your prognosis and long-term care needs.

Compensation is there to help ease the challenges you face and support your recovery where possible. The funds you receive can cover a variety of costs, such as:

  • Private medical treatment
  • Rehabilitation expenses
  • Accessing palliative care, especially for conditions like terminal cancer
  • Replacing lost income
  • Making necessary changes to your home or car for accessibility
  • Traveling to additional medical appointments
  • Purchasing essential equipment like walking aids or breathing aids
  • Addressing the pain and emotional impact of your delayed diagnosis

Why work with Osbornes?

You have just one chance to make a claim, so securing the highest quality legal representation is crucial. Clients choose us for their delayed diagnosis claims because:

  • We are top-rated in legal directors and Trustpilot for our professional and understanding service.
  • We have qualified medical practitioners on our team with insider knowledge of NHS procedures.
  • We are members of the Action Against Medical Accidents and the Law Society’s panel for medical negligence solicitors, which ensures that the highest standards of legal practice are met.
  • We have years of experience handling a wide range of delayed diagnosis cases, and we have won significant settlements for our clients.

When you contact us, a member of our team will listen to your story and assess whether you have grounds for a delayed diagnosis claim. If we believe you do, we’ll offer free legal advice about what steps you can take next with no obligation to work with us.

If you choose to move forward with a claim, our no-win, no-fee agreement means you don’t have to pay any fees until your case is won. We take the financial risk for you so that you can focus on your recovery.

To speak with one of our solicitors, contact us by:

  • Filling in our online enquiry form; or
  • Calling us on 020 7485 8811

Delayed Diagnosis FAQs

How long must you wait until a diagnosis is "delayed"?

Medical professionals use specific guidelines to determine the urgency of referrals and specialist appointments. NHS guidelines say that patients referred for suspected cancer should have a diagnosis confirmed or ruled out within 28 days, for example. For special cases, such as suspected leukemia, referrals may need to happen within hours or days due to severity of symptoms.

Current guidelines and best practices vary based on the condition. These documents and some of the first things we will look at when evaluating your case.

Who do I sue for delayed diagnosis?

When you make a delayed diagnosis claim, you are suing the NHS or the private medical provider responsible for your care. This may be a specific private clinician or the institution where you received treatment. Our team will thoroughly investigate and determine who is at fault in your case.

How do I prove a delayed diagnosis claim?

When you start a claim with us, we will ask you detailed questions to work out what happened and determine if you have a valid claim. If you do, your solicitor will review your medical records and conduct a thorough investigation. We may consult independent medical experts to evaluate your case and provide a professional opinion on whether there was a breach of duty that caused harm.

You don’t have to worry about proving anything yourself—your solicitor will handle everything, and you can put your trust in them.

What if I need support during the process?

We know the idea of taking legal action can feel overwhelming, but we are here to make things as straightforward as possible. If you feel unable to manage the process alone, you can appoint a “litigation friend.” This person — often a family member — can help you through the claim alongside us. We will work closely with your litigation friend, keeping them informed and ensuring they understand your needs.

How long do I have to make a delayed diagnosis claim?

You have three years to make a claim. The time runs from the date you learn about the delayed diagnosis or when you became aware that the delay caused harm. However, there are exceptions, particularly for children or individuals unable to make legal decisions. It’s best to consult with us as soon as possible to clarify your specific situation.

Speak to us about a Delayed Diagnosis Claim

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    • Small but very effective and experienced team so every client benefits from the personal touch but also highly skilled litigation know-how. Capability of the team means they can handle all aspects of very complex cases as well as straightforward matters.

      Legal 500 2025

    • Osbornes is a very respected firm in the marketplace.

      Chambers UK 2024

    • They handle really complex cases very well

      Chambers UK 2024

    • The clinical negligence team are knowledgeable and professional in their approach and demonstrate a high level of skill in litigation work.

      Chambers UK 2024

    • Osbornes Law offers experience in obstetric and fatal claims as well as niche cauda equina cases.

      Chambers UK 2024

    • Osbornes Law is an established firm which handles a breadth of complex and high-value clinical negligence matters.

      Chambers UK 2024

    • Osbornes has a skilled team of solicitors advising clients on a wide range of clinical negligence matters.

      Legal 500 2024

    • Hard working, approachable, good knowledge of clinical negligence and clients’ specific conditions

      Legal 500 2024

    • A joy to work with and always 100% client focused at all times.

      Legal 500 2024

    • The clinical negligence team at Osbornes is much lauded for its ability to ‘represent the diverse range of London-based clients

      Legal 500 2024

    • “The team is very quick and efficient in responding."

      CHAMBERS UK 2023

    • "Obsbornes Law is always client-focused and works tirelessly to obtain the best outcomes for clients."

      CHAMBERS UK 2023

    • ‘They are ambitious for their clients and expect high standards from all who work with them.’

      Legal 500 2023

    • "Osbornes somehow combine the accessibility of a local firm, with the professional standards of a national or city outfit."

      Legal 500 2023

    • "Osbornes, is described as having ‘superb judgement and a medical knowledge that is second to none."

      Legal 500 2023

    • Stephanie has developed a particularly strong reputation for her handling of birth injury claims, as well as cases concerning surgical negligence and delays in surgery.

      Chambers UK

    • "An excellent firm which achieves fantastic outcomes for clients."

      Legal 500 2021

    • "Stephanie Prior takes on complex cases and gets excellent results. She has a background in medicine which serves her clients well and is a realistic but tough litigator."

      Legal 500 2021

    • "Stephanie Prior is hugely dedicated, adored by her clients, tenacious, efficient and extremely knowledgeable."

      Legal 500 2021

    • "Stephanie Prior is very good with troubled clients and is easily able to make them feel at ease."

      Legal 500 2021

    • "Stephanie shows sensitivity and deals with things in an understanding way."

      Chambers UK 2021

    • Osbornes provides a very intimate and personal client service which is increasingly rare in this sector.

      Legal 500 2020 - Clinical Negligence

    • The lawyers in the team are highly experienced and will drive cases very hard on behalf of their clients.

      Legal 500 2020 - Clinical Negligence

    • "Stephanie Prior has a realistic attitude to the complexities of the cases. She wins the trust of her clients and goes the extra mile to ensure they get the best outcomes."

      Legal 500 2020 - Stephanie Prior

    • "Stephanie Prior... manages a varied caseload, including obstetric claims, child and adult brain injury cases and fatal and non-fatal spinal cord injury cases."

      Chambers UK

    • "Stephanie is experienced, knowledgeable of all aspects of clinical negligence work, and strategic in running cases."

      Chambers UK

    • "An exceptional outfit. They take on difficult cases, fight hard and win."

      Chambers UK

    • "The team were extremely professional in putting my needs first. There was a joined-up approach to catering for the client, and all lawyers involved were briefed and constructive."

      Chambers UK

    • Stephanie Prior is always very professional and kind. Highly recommended.

      Medical Negligence Client

    • Quite simply excellent, with a highly competent and well-rounded team. They understand complex medical litigation and have been our lifesavers, and we will always owe them our immense gratitude.

      Medical Negligence Client

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