Insight

Understanding the Difference Between Misdiagnosis and Missed Diagnosis

While they sound similar, misdiagnosis and missed diagnosis mean very different things in a medical malpractice case.

Misdiagnosis or Missed Diagnosis?
Robert M. Marino

Robert M. Marino

April 11, 2019 09:47 AM

Misdiagnosis and missed diagnosis sound like the same thing. The two do share some key similarities. Both can lead to the needless pain and suffering of a patient. Also, both can lay the foundation for a medical malpractice lawsuit. When there is a missed diagnosis, the doctor gives the patient a clean bill of health when, in actuality, the patient is suffering from a disease or other medical condition. With a misdiagnosis situation, the doctor does in fact provide the patient with a diagnosis, but it is the wrong diagnosis. If a patient suffered as a direct result of a missed diagnosis or a misdiagnosis, they may have grounds for a medical malpractice case. Bringing a medical malpractice lawsuit can often feel like an uphill struggle. It is a complicated area of law and one rife with potential pitfalls. An attorney looking to take on a medical malpractice case must be fully aware of the difficulties that lie ahead and the amount of resources it may take to be successful.

The Difficulties in Proving Your Medical Malpractice Case

A missed diagnosis or a misdiagnosis can have catastrophic consequences for a patient. A missed diagnosis or misdiagnosis alone, however, is not enough to successfully bring a medical malpractice case. A patient must prove three important things in order to succeed in a medical malpractice case. These three things include:

  • A doctor-patient relationship existed;
  • The doctor was negligent; and
  • The doctor’s negligence caused injury to the patient.

Negligence generally comes down to whether the doctor deviated from the standard of care in evaluating the patient and arriving at a diagnosis. Medical malpractice cases involving an error in diagnosis is based on a standard set by comparing how another doctor in a similar medical specialty, under similar circumstances should have diagnosed the patient. In other words, in order to prove medical negligence, the patient must be able to show that the doctor failed to provide treatment with a level of skill and competency comparable to other professionals in the same or similar medical field.

To show negligence in a case of misdiagnosis or missed diagnosis, it is critical to understand the methodology the doctor employed in arriving at or failing to arrive at a diagnosis. Doctors use the differential diagnosis method to determine the condition of a patient. The doctor will take the patient’s history, including the patient’s complaints and symptoms, as well as a medical history. Based on that information, the doctor should perform a directed physical examination, which should lead the doctor to a list of all possible causes, ranked in order of which is most likely the case. The doctor will then perform appropriate tests and further evaluations to narrow down that list. The follow-up may include:

  • Asking more questions about symptoms
  • Performing further laboratory or radiological testing
  • Investigating the patient’s medical history
  • Referrals to specialists

In some cases, there may have been an error in one of the diagnostic tests. Whether the problem was caused due to faulty medical equipment or human error will need to be determined. Depending on the cause of the diagnostic error, the doctor may not be liable for medical malpractice. In these kinds of cases, a lab technician or other party may be responsible.

To prove that the doctor was negligent with regard to arriving at a correct diagnosis, the patient will need to show that either:

  • The doctor did not perform the differential diagnosis properly, which resulted in the missed or misdiagnosis; or
  • The doctor did not include all of the appropriate possibilities in the differential diagnosis list that a reasonably prudent physician should have considered under similar circumstances; or
  • The doctor failed to perform proper testing to rule in or rule out these possibilities and arrive at a definitive diagnosis.

Generally speaking, an expert witness will need to be called in to evaluate how the doctor employed the differential diagnosis method and whether the requisite standard of care was met.

If the patient is able to prove that the doctor was negligent, causation will still need to be addressed. Causation is another necessary, but potentially problematic, element of medical malpractice cases. It is not enough that an error in diagnosis occurred. The misdiagnosis or missed diagnosis must have directly caused harm to the patient and that, had he or she been properly diagnosed, the harm would have never occurred. Harm caused by misdiagnosis or missed diagnosis usually is due to the fact that the incorrect diagnosis led to the wrong type of medical treatment, or an absence of any treatment thus allowing the patient’s condition to get worse. The error in medical treatment may have led the patient to needlessly suffer continuing pain or it may even have caused further medical issues beyond the patient’s initial problems.

Causation can be one of the largest obstacles to overcome in a medical malpractice case. The patient must show that the suffering they endured was not just because he or she suffered from a medical condition, but that it was a direct result of the doctor’s error. The patient must show that he or she suffered in a way that would not have happened had a proper diagnosis been made. With someone already suffering a medical condition, it is necessary to show that pain was caused or exacerbated by an improper diagnosis rather than the condition itself just running its course.

Why Lawyers Don’t Take Medical Malpractice Cases

Many lawyers choose not to handle medical malpractice cases. Proof of medical malpractice can be very difficult to come by. There may be clear injuries, but then you still have to show that the injuries were a direct result of negligence. Proving causation is just one obstacle that stops attorneys from taking on medical malpractice claims. Even lawyers who choose to take on these types of cases tend to be extremely selective. This is so because medical malpractice cases are not only complicated, but require many resources in which most lawyers are not willing or able to invest. The professional liability insurers for medical professionals are prepared to defend malpractice cases with everything they have.

Not only can medical malpractice cases be intimidating to most lawyers, but they are very expensive. There are substantial upfront costs that need to be put forward to even begin investigating a potential medical malpractice case. Qualified medical experts are necessary to analyze and investigate medical records. There will be mountains of medical records and paperwork to sift through and the attorney will need to have a strong understanding of the medicine involved.

While taking on a medical malpractice case may be daunting, seeing positive results and changing the life of a client is within reach to those attorneys who have the right resources and knowledge base. The reward in successfully bringing this type of claim is helping the client achieve justice and a secure future.

-----------------------

Robert Marino became a lawyer because he wanted to give a voice to the voiceless. He does just that by focusing his practice on cases where people need help standing up to those who have injured them and he helps his clients protect their recoveries and benefits. His passion for the law extends to his role as an adjunct professor of law, where, for more than 15 years, he has been teaching future generations of lawyers. Rob’s practice areas include personal injury, labor law, trusts & estates, business law, medical malpractice, appellate law, and surrogate’s court.

Related Articles

One of the Greatest Ever...


by Justin Smulison

Steve Yerrid, a top catastrophic injury lawyer, has secured over 300 verdicts of $1M+ and has been recognized as "Lawyer of the Year" multiple times in Tampa.

Lawyer in blue suit poses in office for headshot

Pribanic Secures Milestone Verdict in Rural PA County


by Justin Smulison

Ten-time honoree Victor H. Pribanic secured one of 2023’s most notable verdicts in a Pennsylvania county that historically has not been empathic to plaintiffs.

Lawyer sitting at desk with notepad and laptop

Preventing Malpractice Issues in Pediatric Practice. A Lawyer's Perspective


by Sean M. Cleary

Despite medical breakthroughs and patient care, hospitals often act as a source of medical malpractice claims, leaving patients in dire need of legal counsel.

Sketch of doctor providing medical care to child

IN PARTNERSHIP

Salvi & Maher, LLP: Legal Leaders in Illinois and Wisconsin


by Justin Smulison

For more than 35 years, Salvi & Maher LLP has defended their clients throughout Illinois and Wisconsin in various areas of personal injury law, including medical malpractice, motor vehicle accidents, premises liability and trucking litigation.

Salvi & Maher Law Firm group in front of legal library and cases of books

6 Ways a Lawyer Can Help You With Your Medical Malpractice Claim


by Adam Malone

If you believe you have a medical malpractice claim, contact an experienced medical malpractice lawyer. Read on to learn how they can help with your claim.

Doctor in white lab coat showing x-ray to patient in blue scrubs

IN PARTNERSHIP

Protecting and Fighting for Florida’s Future


by Justin Smulison

Trial lawyer and Best Lawyers® “Lawyer of the Year” multiple times, Steve Yerrid discusses how his courtroom results have improved safety and life in Florida.

Lawyer in blue suit smiles for headshot photo

IN PARTNERSHIP

Salvi & Maher, LLP: Illinois and Wisconsin's Personal Injury Firm


by Justin Smulison

For more than 35 years, Salvi & Maher LLP has defended their clients throughout Illinois and Wisconsin in various areas of personal injury law, including medical malpractice, motor vehicle accidents, premises liability and trucking litigation.

Skyline of Chicago with green river and blue background

IN PARTNERSHIP

Emroch & Kilduff: Virginia's Personal Injury & Medical Malpractice Attorneys


by Emroch & Kilduff and Emroch & Kilduff

For over 40 years, the award-winning Virginia-based firm Emroch & Kilduff has worked to represent their personal injury clients in both state and federal courts.

Skyline with blur background and wide view of park

IN PARTNERSHIP

Needle & Ellenberg: Helping Victims of Medical Malpractice Receive Compensation Throughout Florida


by Needle & Ellenberg and Needle & Ellenberg

Needle & Ellenberg, P.A. discuss five common types of medical malpractice that can help determine if you have a potential claim.

Doctor with hand on face reviewing scan with another doctor in backdrop

What Exactly Does a Medical Negligence Lawyer Do?


by Best Lawyers

Medical negligence, known as malpractice, happens when healthcare professionals fail to provide the level of care that is required for their patient. In order to hire the right representation for you, here's a list of their key responsibilities.

Medical professional holds pill bottle standing over patient in bed

IN PARTNERSHIP

Leadership and Commitment


by Justin Smulison

Malone Law leader and 2016 Medical Malpractice Law – Plaintiffs “Lawyer of the Year” Adam Malone discusses how his success transcends the courtroom and helps strengthen public and legal communities.

Suited man standing with arm resting on table

Aim High and Fly


by Khalil Abdullah

From a silent victim of hometown segregation to Air Force captain and lawyer of consummate skill, Karen Evans exemplifies leadership—and vows always to help those who seek to follow her path.

Karen Evans' Leadership in the Airforce

Courtroom Mastery


by Justin Smulison

Victor H. Pribanic recalled the excitement of returning to the courtroom in late 2021 for a medical negligence case that could help set a new course for Pribanic & Pribanic’s trial advocacy.

Victor H. Pribanic Makes Return to Courtroom

New England's Best Lawyers 2022


by Best Lawyers

Our New England's Best Lawyers 2022 publication features top-ranked legal talent in New England.

New England's Best Lawyers 2022

Announcing the 2022 Best Lawyers: The Injury & Malpractice Issue


by Best Lawyers

Featuring the top legal talent from The Best Lawyers in America, Best Lawyers: Ones to Watch in America and “Lawyer of the Year” recipients for personal injury and medical malpractice as well as thought leadership from some of the nation’s top lawyers.

Best Lawyers Injury & Malpractice Publication

Georgia's Injury and Malpractice Leaders


by Justin Smulison

In 2021, Adam Malone recovered more than $38 million in settlements for catastrophically injured clients, while continuing his leadership roles outside the courtroom to enhance the profession for injury lawyers.

Malone Law Remain Leaders in Personal Injury

Trending Articles

2025 Best Lawyers Awards Announced: Honoring Outstanding Legal Professionals Across the U.S.


by Jennifer Verta

Introducing the 31st edition of The Best Lawyers in America and the fifth edition of Best Lawyers: Ones to Watch in America.

Digital map of the United States illuminated by numerous bright lights.

Unveiling the 2025 Best Lawyers Awards Canada: Celebrating Legal Excellence


by Jennifer Verta

Presenting the 19th edition of The Best Lawyers in Canada and the 4th edition of Best Lawyers: Ones to Watch in Canada.

Digital map of Canadathis on illuminated by numerous bright lights

Discover The Best Lawyers in Spain 2025 Edition


by Jennifer Verta

Highlighting Spain’s leading legal professionals and rising talents.

Flags of Spain, representing Best Lawyers country

Unveiling the 2025 Best Lawyers Editions in Brazil, Mexico, Portugal and South Africa


by Jennifer Verta

Best Lawyers celebrates the finest in law, reaffirming its commitment to the global legal community.

Flags of Brazil, Mexico, Portugal and South Africa, representing Best Lawyers countries

Presenting the 2025 Best Lawyers Editions in Chile, Colombia, Peru and Puerto Rico


by Jennifer Verta

Celebrating top legal professionals in South America and the Caribbean.

Flags of Puerto Rico, Chile, Colombia, and Peru, representing countries featured in the Best Lawyers

Prop 36 California 2024: California’s Path to Stricter Sentencing and Criminal Justice Reform


by Jennifer Verta

Explore how Prop 36 could shape California's sentencing laws and justice reform.

Illustrated Hands Breaking Chains Against a Bright Red Background

Tampa Appeals Court ‘Sends Clear Message,” Ensuring School Tax Referendum Stays on Ballot


by Gregory Sirico

Hillsborough County's tax referendum is back on the 2024 ballot, promising $177 million for schools and empowering residents to decide the future of education.

Graduation cap in air surrounded by pencils and money

Find the Best Lawyers for Your Needs


by Jennifer Verta

Discover how Best Lawyers simplifies the attorney search process.

A focused woman with dark hair wearing a green top and beige blazer, working on a tablet in a dimly

Paramount Hit With NY Class Action Lawsuit Over Mass Layoffs


by Gregory Sirico

Paramount Global faces a class action lawsuit for allegedly violating New York's WARN Act after laying off 300+ employees without proper notice in September.

Animated man in suit being erased with Paramount logo in background

The Human Cost


by Justin Smulison

2 new EU laws aim to reshape global business by enforcing ethical supply chains, focusing on human rights and sustainability

Worker wearing hat stands in field carrying equipment

Introduction to Demand Generation for Law Firms


by Jennifer Verta

Learn the essentials of demand gen for law firms and how these strategies can drive client acquisition, retention, and long-term success.

Illustration of a hand holding a magnet, attracting icons representing individuals towards a central

Social Media for Law Firms: The Essential Beginner’s Guide to Digital Success


by Jennifer Verta

Maximize your law firm’s online impact with social media.

3D pixelated thumbs-up icon in red and orange on a blue and purple background.

ERISA Reaches Its Turning Point


by Bryan Driscoll

ERISA litigation and the laws surrounding are rapidly changing, with companies fundamentally rewriting their business practices.

Beach chair and hat in front of large magnify glass

Best Lawyers Expands With New Artificial Intelligence Practice Area


by Best Lawyers

Best Lawyers introduces Artificial Intelligence Law to recognize attorneys leading the way in AI-related legal issues and innovation.

AI network expanding in front of bookshelf

Critical Period


by Armelle Royer and Maryne Gouhier

How the green-energy raw materials chase is rewriting geopolitics

Overhead shot of mineral extraction plant

The Litigation Finance Mass Tort Gold Rush


by Justin Smulison

Third-party litigation funding is transforming mass torts, propelling the high-risk area into a multi-billion-dollar industry

Gold coins with data chart backdrop