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Medical Negligence

Apr 29, 2026

Failure to Diagnose Medical Negligence

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Written by Katie Ferrier

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Failure to Diagnose Medical Negligence
Image Description: Failure to Diagnose Medical Negligence

Key Takeaways

Delayed diagnosis or medical errors may entitle you to medical negligence compensation against healthcare providers. Clinical negligence claims require proving breach of professional standards.

• Misdiagnosis claims require proof that a competent practitioner would have diagnosed the condition
• Delay in diagnosis must have caused material harm or prevented timely, less invasive treatment
• Expert medical evidence establishing breach of professional standards is essential for claims
• Medical Liability reform legislation governs negligence claim limitations and time periods

An unintentional delay is when there is sufficient information available, but it is for one reason or another overlooked

If there has been a delay in diagnosis, a misdiagnosis or a failure to diagnose and that failure has resulted in injury, you may be able to make a medical negligent claim for compensation.

A failure to diagnose is when there is no attempt to make a diagnosis.

What does delay mean?

Example: your test results show that you have cancer but your does not act on the information contained in the test and you suffer as a result of the delay.


What does misdiagnosis mean?

When an incorrect diagnosis was made before the correct diagnosis. Misdiagnosis can occur in one of three ways

  1. Underdiagnosing – when the given diagnosis is less serious than the correct diagnosis
  2. Over diagnosing – when the given diagnosis is worse than the correct diagnosis
  3. Incorrect diagnosing – completely wrong diagnosis

Example: you attend your doctor because you have a persistent sore throat, your doctor performs a check up and tells you that you simply have a sore throat. You like in pain for some years and subsequently find out that you have throat cancer, that is now too advanced for treatment.


How do I prove delay, misdiagnosis or a failure to diagnose?

The first step in establishing your claim for delay, misdiagnosis, or failure to diagnose is to look at the clinical notes.

This is because most diagnostic errors are evident from the treatment provider or medical professions notes.

What we look for:

  • The history taken – is it detailed or brief?
  • Legibility of the notes – if hand written and illegible this could be a source of confusion which leads to error
  • The systems in place – Are they complex and confusing?
  • Shift hand over – Errors or misrepresentations at hand over resulting in a different course of action
  • Lack of definite diagnosis
  • Whether there are any referrals
  • Numerous diagnoses
  • Extensive pathology, radiological or diagnostic testing such as scans
  • Where the notes come from
    • Emergency department
    • Hospitals
    • General practitioner
  • Assessment
  • Plans
  • Follow ups with the patients

How do I win my case?

You will need to prove using evidence that the doctor failed in their duty and had they had exercised due care and skill there would not have been a delay, misdiagnosis or failure to diagnose.

The law surrounding delay, misdiagnosis or failure to diagnose is complicated. For this reason, Garling & Co Lawyers offers a no obligation free case assessment so that you can better understand your rights and the prospect of success in your medical negligence / medical malpractice claim.

Thank you for reading our article. We hope it helped your understanding of Medical Negligence. For more information on timelines see our article on How long does a medical negligence claim take here. Should you have any further questions, please contact our office at (02) 8329 9500 or complete a free case assessment today.


Katie headshot
Image Description: Katie headshot
Written By Katie Ferrier Senior Associate
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Disclaimer

The information contained on this article is of a general nature only and is not intended to be legal advice. The law may have changed since the information was published. There is no intention to create a lawyer-client relationship and you should always seek legal advice about your own personal circumstances.

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