Diagnostic Errors: The #1 Silent Killer in Pennsylvania Healthcare
By Ben Gobel on May 5, 2026
When people think about medical malpractice, they often picture surgical mistakes or medication errors. In reality, diagnostic errors are one of the most common and dangerous forms of medical mistakes in the United States, including here in Pennsylvania.
A diagnostic error occurs when a medical condition is missed, delayed, or incorrectly identified. These mistakes can prevent patients from receiving the treatment they need at the right time, allowing serious conditions to worsen.
For many families, the consequences of a diagnostic error can be life-altering. At Ogg, Murphy & Perkosky, P.C., we help patients and their families review what happened, understand their legal options, and take steps to protect their health and their rights moving forward.
What Is a Diagnostic Error?
A diagnostic error happens when a healthcare provider fails to correctly identify a patient’s condition on time. This can occur in several ways, including:
- Misdiagnosis: A doctor identifies the wrong condition
- Delayed diagnosis: The correct diagnosis is made, but only after a harmful delay
- Failure to diagnose: A medical condition is completely missed
These errors can affect both common and rare conditions. In many cases, patients seek care multiple times before the correct diagnosis is finally made.
Diagnostic errors are especially dangerous because treatment decisions depend entirely on the accuracy of the diagnosis.
Conditions Most Commonly Misdiagnosed in Pennsylvania
Some medical conditions are more frequently misdiagnosed than others. These conditions often share symptoms with less serious illnesses, making them harder to detect without thorough evaluation.
Commonly misdiagnosed conditions include:
- Cancer
- Stroke
- Heart attacks
- Infections such as sepsis
- Blood clots
- Neurological conditions
For example, symptoms like fatigue, headaches, chest discomfort, or dizziness may be attributed to minor issues when they actually signal a serious medical problem.
When warning signs are overlooked, patients may lose valuable time that could have prevented severe complications.
Why Diagnostic Errors Happen
Diagnostic mistakes rarely occur because of a single factor. In many cases, they result from a combination of medical, administrative, and communication failures.
Some of the most common causes include:
- Incomplete Medical Evaluations – A physician may fail to order the proper tests or imaging needed to confirm a diagnosis.
- Misinterpreted Test Results – Laboratory results, scans, or pathology reports may be misread or overlooked.
- Communication Breakdowns – Important information about symptoms, medical history, or follow-up care may not be properly shared between providers.
- Overlapping Symptoms – Many serious illnesses present with symptoms that resemble less dangerous conditions.
- Rushed Medical Decisions – Busy emergency rooms and overloaded healthcare systems can sometimes lead to incomplete assessments.
Even experienced healthcare providers can make mistakes. However, when a diagnostic error occurs because a provider failed to meet the accepted standard of care, it may constitute medical malpractice.
The Consequences of a Misdiagnosis in Pennsylvania
The impact of a diagnostic error can be severe, particularly when treatment is delayed.
Patients may experience:
- Progression of a disease that could have been treated earlier
- The need for more aggressive medical treatment
- Permanent injury or disability
- Additional medical expenses
- Emotional distress and reduced quality of life
In the most tragic cases, delayed or missed diagnoses can lead to preventable deaths.
Because of these risks, diagnostic errors are often considered one of the most dangerous types of medical mistakes in modern healthcare.
How Medical Malpractice Laws Protect Pennsylvania Patients
Under Pennsylvania law, healthcare providers are required to follow an accepted standard of medical care when diagnosing and treating patients.
If a doctor fails to follow this standard and the patient suffers harm as a result, the patient may have the right to pursue compensation through a medical malpractice claim.
Compensation in these cases may include damages related to:
- Medical expenses
- Lost wages or reduced earning capacity
- Ongoing medical care
- Pain and suffering
- Long-term disability
Medical malpractice cases involving diagnostic errors often rely heavily on expert medical testimony to demonstrate how the diagnosis should have been made.
Because of the complexity of these claims, reviewing the facts with an experienced attorney can help patients understand whether negligence may have played a role.
Speaking With a Pittsburgh Medical Malpractice Lawyer
If you believe a delayed or incorrect diagnosis caused serious harm, it may be helpful to review your situation with a legal professional.
The attorneys at Ogg, Murphy & Perkosky, P.C. represent injured patients and families throughout Pittsburgh and across Pennsylvania. By reviewing medical records, consulting medical experts, and examining the timeline of care, our team can determine whether a diagnostic error may qualify as medical malpractice.
If you believe a misdiagnosis or delayed diagnosis caused serious harm, contact us today to discuss your situation and learn what options may be available.
Frequently Asked Questions
What is considered a diagnostic error in healthcare?
A diagnostic error occurs when a medical condition is misdiagnosed, diagnosed too late, or completely missed by a healthcare provider, resulting in delayed or incorrect treatment.
Are diagnostic errors common in the United States?
Yes. Studies suggest that millions of patients are affected by diagnostic errors each year. These mistakes are considered one of the leading causes of preventable medical harm.
Can a misdiagnosis be considered medical malpractice?
A misdiagnosis may qualify as medical malpractice if a healthcare provider failed to meet the accepted medical standard of care and the mistake caused harm to the patient.
How long do I have to file a medical malpractice claim in Pennsylvania?
In most cases, Pennsylvania law allows patients two years from the date the injury was discovered to file a medical malpractice claim. Certain exceptions may apply.
What evidence is used in diagnostic error cases?
Medical records, test results, physician notes, and expert medical testimony are often used to determine whether the diagnosis should have been made earlier.
What should I do if I suspect a misdiagnosis?
If you believe a diagnostic error caused harm, it is important to gather your medical records and speak with a qualified attorney who can review your case and explain your legal options.