How long do you have to make a medical negligence claim?
In many cases the standard limitation period is three years, but the point at which those three years begin can vary and important exceptions may apply.
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Diagnosis
Misdiagnosis Claims
A wrong diagnosis can lead to unnecessary treatment, delayed treatment of the real condition or a worse prognosis. Each case turns on what a competent clinician should reasonably have identified at the time.
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1
Incorrect diagnosis
2
Failure to consider an alternative diagnosis
3
Misreading test or scan results
Last updated 6 August 2026
Understanding the claim
What can amount to misdiagnosis?
A poor outcome alone does not prove negligence. The investigation considers what a reasonably competent healthcare professional should have done and whether any failure made a material difference to the outcome.
Incorrect diagnosis
This can justify investigation depending on the clinical circumstances, available evidence and harm caused.
Failure to consider an alternative diagnosis
This can justify investigation depending on the clinical circumstances, available evidence and harm caused.
Misreading test or scan results
This can justify investigation depending on the clinical circumstances, available evidence and harm caused.
Failure to act on red-flag symptoms
This can justify investigation depending on the clinical circumstances, available evidence and harm caused.
Inappropriate treatment following a wrong diagnosis
This can justify investigation depending on the clinical circumstances, available evidence and harm caused.
Failure to review a diagnosis when symptoms persist
This can justify investigation depending on the clinical circumstances, available evidence and harm caused.
Evidence
How a misdiagnosis claim may be investigated
Relevant evidence depends on the circumstances. Common sources include:
01
GP and hospital records
The evidence is considered alongside the chronology and appropriate independent expert opinion.
02
Test and imaging results
The evidence is considered alongside the chronology and appropriate independent expert opinion.
03
Referral history
The evidence is considered alongside the chronology and appropriate independent expert opinion.
04
Independent expert evidence
The evidence is considered alongside the chronology and appropriate independent expert opinion.
The process
What happens after an initial enquiry
- 01
Initial enquiry
Tell us what happened, when the treatment took place and how you were affected.
- 02
Early assessment
The key facts, limitation position and whether further investigation may be appropriate are considered.
- 03
Records & evidence
Relevant medical records, chronology and evidence of any financial losses may be obtained.
- 04
Expert review
Appropriate independent experts may address breach of duty, causation, condition and prognosis.
- 05
Claim & negotiation
Where the evidence supports a claim, the relevant defendant can be notified and liability or settlement discussed.
- 06
Resolution
The matter may conclude by agreement or, where necessary, through the court process.
Compensation
What can compensation take into account?
There is no reliable generic calculator for medical negligence. Where liability is established, compensation can reflect the individual injury and financial consequences supported by evidence.
- Pain, suffering and loss of amenity
- Past and future loss of earnings
- Care and assistance
- Rehabilitation and treatment
- Equipment, travel or accommodation needs
- Other reasonable losses caused by the injury
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Tell us what happened.
Questions answered
Misdiagnosis FAQs
Is every wrong diagnosis negligent?
No. Medicine can involve reasonable uncertainty. A claim normally requires evidence that the diagnostic process fell below an acceptable standard and caused harm.
Can I claim if the correct diagnosis was made later?
Potentially, where an avoidable diagnostic error caused a harmful delay or changed the treatment or outcome.
Related guidance
Useful medical negligence guides
How medical negligence claims work
A plain-English overview of breach of duty, causation, medical records, expert evidence and the main stages of a claim.
Read guide →
Can you claim for an A&E misdiagnosis?
Key considerations where emergency care failed to recognise, investigate or appropriately respond to a serious condition.
Read guide →Free initial enquiry
Talk to us about a potential misdiagnosis claim.
Tell us what happened and our team can explain the next steps.